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Implementation Details
Writing rules and understanding alerts for Snort, a network intrusion detection system
Applies to the practice:
"Identify data that characterize systems and aid in dectecting signs of suspicious behavior"
Applicable Technologies:
Solaris 2.x; UNIX operating system and derivatives
Snortis a lightweight network intrusion detection system created by Martin Roesch (see http://www.snort.org).Snortis based on the libpcappacket capture library, commonly used in may TCP/IP traffic sniffers and analyzers. According to theSnortweb site, the program "can perform protocol analysis, content searching/matching, and can be used to detect a variety of attacks and probes, such as buffer overflow, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts, and much more"
Snorthas a real-time alerting capability, with alerts being sent tosyslog, a separate "alert" file, or as a WinPopup message via Samba's smbclient.
This implementation covers the basic steps to obtain and install theSnortintrusion detection system on your computer. We examine how to writeSnortrules and describe how you can validate generated alerts. This document does not cover basic or advanced use of theSnortsystem, customization of the installation, configuration of the logging and alerting system, or answer such questions as where to deploySnortin your network environment. For details on these subjects, ports to other operating systems, plug-ins for reporting, and pre-built rule sets, consult theSnortweb site.
Effort EstimatesTime to retrieve the necessary archive files from the distribution site will vary depending on connection speed. The expected time is a minute or less with a high speed connection. Building and installing Snort usually takes a minute or two, depending on machine performance.
System PrerequisitesSnort can be built and installed on many UNIX systems. The following list is taken from the Snort web site:
Snort is known to compile and run on:
Sparc: SunOS 4.1.x, Solaris, Linux, and OpenBSD
x86: Linux, OpenBSD, FreeBSD, NetBSD, and Solaris
M68k/PPC: Linux, OpenBSD, NetBSD, Mac OS X Server
Snort should also compile on:
AIX, IRIX, HPUX, Tru64
Software Prerequisites
To build and runSnort, you need internet access to retrieve the software and the following software tools:
*.An MD5 cryptographic checksum program (refer to Using MD5 to verify the integrity of file contents).
*.GZIP to uncompress the downloaded files ( ftp://ftp.gnu.org/gnu/gzip/).
*.A C compiler; either the Sun C Computer or the free GNU C Compiler ( ftp://ftp.gnu.org /gnu/gcc/).
*.libpcap library installed, see the implementation Installing libpcap to support network packet capturing tools on systems running Solaris 2.X.
Downloading and Verifying
Download the following files into the same directory and verify their checksums with an MD5 checksum program.
File to Download
MD5 Checksum
http://www.snort.org/Files/snort- 1.6.3.tar.gz
Source distribution for UNIX
5d628b08c0bf42af3affc9fcfca7ea69
http://www.snort.org/Files/snort- 1.6.3-sol-2.6-sparc-local
Pre-compiled distribution for Solaris 2.6
ca491ade76253700860a6e2ac9259874
If the computed cryptographic checksum of the download files does not correspond to the information given above, verify that:
*.your downloaded filenames match those listed
*.your checksum program computes MD5 message digests
Building
The pre-compiled Solaris 2.6 distribution may be installed using thepkgaddprogram. If you are unfamiliar withpkgadd, or distrust supplied packages and wish to examine the source code, we recommend installing the program using the following procedure.
Unpack theSnortsource distribution.
The compressed file can be uncompressed using the GNUgunziputility and unpacked using the systemtarcommand:
# gunzip -c snort-1.6.3.tar.gz| tar xvf -
This creates a directory namedsnort-1.6.3. Change to this subdirectory because all remaining operations are performed there.
You should review the INSTALL file to ensure that there are no other prerequisites before compiling the program. Additionally, configure-time switches are listed in this file, which allow such configurations as ‘flexible-response’ and SMB alerting.
Now, configure and make the program with
# /bin/sh ./configure
# /usr/ccs/bin/make
Testing Before Installation
Test theSnortsystem.
To test the correct operation ofSnort, executeSnortwith the following options from the install location, as follows:
# ./snort –c ./snort-lib –v –i hmex
You should receive output to the terminal similar to that produced by tcpdump(i.e., date and time stamp, unresolved source IP, source port, unresolved destination IP, destination port, and other protocol specific information).
Installation
Now install the program and manual pages with the following command. You should check the file ownerships and file protections once they have been copied to ensure that they cannot be modified or executed by unprivileged accounts, and that they reflect the security policy of your organization.
# /usr/ccs/bin/make install
Create a Directory for Snort Log Files
Create a separate directory where theSnortlog and alert files will be stored. Note that this directory will contain connection information that may expose potential intrusions and attempted attacks of your network. We recommend that you restrict access to this directory as shown below. We further recommend that you store this directory within the/vardirectory because/varusually contains other log information:
# /bin/mkdir /var/adm/snort
# /bin/chmod 700 /var/adm/snort
Testing After Installation
Test theSnortsystem.
TestSnortby following procedures similar to those under the "Testing Before Installation" section. To get help on command line options toSnort, issue the following from the command line:
# ./snort -?
Writing Rules
SnortRules
Snortallows you to write rules describing
*.well-known and common vulnerability exploitation attempts
*.violations of your security policy
*.conditions under which you think a network packet(s) might be anomalous
Through the use of an easy-to-understand and lightweight rule-description language,Snortrules can be both flexible and robust; written both for protocol analysis and content searching and matching.
Two basic guiding principles must be kept in mind when writingSnortrules:
*.Rules must be completely contained on a single line.
*.Rules are divided into two logical sections, therule headerand therule options. The rule header contains the rule's action, protocol, source and destination IP addresses and CIDR (Classless Inter-Domain Routing) block, and the source and destination ports information. The rule option section contains alert messages. It also contains information about which parts of the packet you should inspect to determine if you should take the rule action.
An example rule:
alert tcp any any -> 192.168.1.0/24 111
(content:"|00 01 86 a5|"; msg: "mountd access";)
[Example 1 - SampleSnortRule]
This rule describes an alert that is generated when Snort matches a network packet with all of the following attributes:
*.TCP packet
*.Sourced from any IP address on any port
*.Destined for any IP address on the 192.168.1.0 network (24 describes the CIDR block and netmask used) on port 111.
The text up to the first parentheses is therule header:
"alert tcp any any -> 192.168.1.0/24 111"
The section enclosed in parenthesis is therule options:
"(content:"|00 01 86 a5|"; msg: "mountd access";)"
The word(s) before the colons in therule optionssection are calledoption keywords. These keywords may appear once, as with ‘content’ in Example 1 above, or multiple times, as shown in Example 2 below:
alert tcp any any -> any 21 (content:"site exec"; content:"%"; msg:"site
exec buffer overflow attempt";)
[Example 2 - SampleSnortRule]
The above rule illustrates an FTP vulnerability. The keyword "content" appears twice because the two strings that "content" describes are not concatenated but appear at different locations within the packet(s). For this rule to be violated, the content of a packet(s) must contain both character strings, "site exec" and "%".
Therule optionssection is not specifically required by any rule; it is used for the sake of making tighter definitions of packets to collect or to issue an alert.
Elements of an individual rule are treated as forming a logical AND statement. The complete collection of rules in aSnortrules library file (i.e., snort-lib) are treated as forming a larger logical OR statement.
Basics in WritingSnortRules
Rule Actions:
Therule headercontains the information that defines the "who, where, and what" of a packet, as well as what to do when a packet occurs with all the attributes indicated in the rule. The first field in a rule is the rule action. The rule action tellsSnortwhat to do when it finds a packet that matches the rule criteria. There are three available actions inSnort- alert, log, and pass.
alert- generates an alert using the selected alert method, and then log the packet
log- logs the packet
pass- drops (ignore) the packet
Protocols:
The next field in a rule is the protocol. There are three IP protocols thatSnortcurrently analyzes for suspicious behavior, TCP, UDP, and ICMP. In the future there may be more, such as ARP, IGRP, GRE, OSPF, RIP, and IPX.
IP Addresses:
The next portion of the rule header deals with the IP address and port information. The keyword "any" may be used to define any address.Snortdoes not have a mechanism to provide host name lookup for the IP address fields in the rules file. The addresses are formed by a straight numeric IP address and a CIDR block. The CIDR block indicates the netmask that should be applied to the rule's address and any incoming packets that are tested against the rule. A CIDR block mask of /24 indicates a Class C network, /16 a Class B network, and /32 a specific machine address. For example, the address/CIDR combination 192.168.1.0/24 would signify the block of addresses from 192.168.1.1 to 192.168.1.255. Any rule that used this designation for, say, the destination address would match on any address in that range. The CIDR designations give us an easy way to designate large address spaces with just a few characters.
In Example 1 (above), the source IP address was set to match for any computer communicating, and the destination address was set to match on the 192.168.1.0 Class C network.
A negation operator can be applied to IP addresses. This operator tellsSnortto match any IP address except the one indicated by the listed IP address. The negation operator is indicated with a "!". For example, an easy modification to the initial example is to make it alert on any traffic that originates outside of the local network with the negation operator as shown in Example 3.
alert tcp ! 192.168.1.0/24 any -> 192.168.1.0/24 111
(content: "|00 01 86 a5|"; msg: "external mountd access";)
[Example 3 - Example IP Address Negation Rule]
This rule's IP addresses indicate "any TCP packet with a source IP address not originating from the internal network and a destination address on the internal network".
Port Numbers:
Port numbers may be specified in a number of ways, including "any" ports, static port definitions, ranges, and by negation. "Any" ports is a wildcard value, meaning literally any port. Static ports are indicated by a single port number, such as 111 for portmapper, 23 for telnet, or 80 for http. Port ranges are indicated with the range operator ":". The range operator may be applied in a number of ways, such as in Example 4.
log udp any any -> 192.168.1.0/24 1:1024
Log UDP traffic coming from any port and destination ports ranging from 1 to 1024.
log tcp any any -> 192.168.1.0/24 :6000
Log TCP traffic from any port going to ports less than or equal to 6000.
log tcp any :1024 -> 192.168.1.0/24 500:
Log TCP traffic from privileged ports less than or equal to 1024 going to ports greater than or equal to 500.
[Example 4 - Port Range Examples]
The negation operator, "!", may be applied against any of the other rule types (except "any", which would translate to none). For example, if for some reason you wanted to log everything except the X Windows ports, you could do something like the rule in Figure 5.
log tcp any any -> 192.168.1.0/24
!6000:6010
[Example 5 - Example of Port Negation]
Direction Operator:
The direction operator "->" indicates the orientation, or "direction", of the traffic that the rule applies to. The IP address and port numbers on the left side of the direction operator designate traffic coming from the source host, and the address and port information on the right side of the operator designate destination host. There is also a bi-directional operator, which is indicated with a "<>" symbol. This tellsSnortto consider the address/port pairs in either the source or destination orientation. This is handy for recording and analyzing both sides of a conversation, such as telnet or POP3 sessions. An example of the bi-directional operator being used to record both sides of a telnet session is shown in Example 6.
log ! 192.168.1.0/24 any <> 192.168.1.0/24 23
[Example 6 -Snortrules using the Bi-directional Operator]
In Example 6, any traffic on any port originating from outside the internal network (192.168.1.x) with a destination of the internal network on the telnet port (23) is logged. Reciprocally, any telnet traffic originating from the internal network with a destination outside the internal network to any port is logged. Therefore, both sides of a telnet connection are logged.
Snort Alerting
SnortAlerts and How We Trust Them
Alerting, part of the Alerting and Logging subsystem, is activated at run-time through the use of command-line options. In this section, we do not discuss these options, as they are detailed in documentation on the Snortweb site. Instead, we describe how you, the system administrator, can verify that aSnort-generated alert is valid.
To fully trust an intrusion detection system alert, you must be able to examine three complementary data points: a rule representing behavior you know or suspect of being anomalous, an alerting message warning you of a rule violation or of particular behavior, and a network packet (or series of packets) causing the rule violation. In lieu of having all three components, you must be able to relate the network packet to at least one of the following:
1.the alerting message (of the proposed intrusion or intrusion attempt)
2.the rule violated (of the proposed intrusion or intrusion attempt)
If neither of these relationships occur, you are precluded from characterizing the security event as a positive or negative. The network packet(s) is a critical point-of-examination, and without the actual, tangible packet(s) we cannot investigate whether a rule is violated or an alerting message displays a positive occurrence of violation to our security policy. Therefore, becauseSnortallows you to configure various levels of alerting and logging, we recommend thatSnortbe set up to log the offending packets causing the rule violation and to record the alerts, in separate files.
SnortAlerts and Logs
WhenSnortinspects a network packet and detects a match between a rule (describing a violation) and the network packet,Snortsends an alerting message to the user-defined facility and/or logs the packets causing the rule violation. The alerts
"may either be sent to syslog, logged to an alert text file in two different formats, or sent as WinPopup messages using the Samba smbclient program. The syslog alerts are sent as security/authorization messages that are easily monitored with tools such as swatch[SWT93]. WinPopup alerts allow event notifications to be sent to a user-specified list of Microsoft Windows consoles running the WinPopup software. There are two options for sending the alerts to a plain text file; full and fast alerting. Full alerting writes the alert message and the packet header information through the transport layer protocol. The fast alert option writes a condensed subset of the header information to the alert file, allowing greater performance under load than full mode. There is a fifth option to completely disable alerting, which is useful when alerting is unnecessary or inappropriate, such as when network penetrations tests are being performed."
Similarly, logging can be set up to
"log packets in their decoded, human-readable format to an IP-based directory structure, or in tcpdumpbinary format to a single log file. The decoded format logging allows fast analysis of data collected by the system. The tcpdump format is much faster to record to the disk and should be used in instances where high performance is required. Logging can also be turned off completely, leaving alerts enabled for even greater performance improvements."
To put this into perspective, let’s examine the logging and alerting areas of a system. For this discussion, the system sends alerts to thesyslogfacility and the offending network packet(s) to an IP-based directory structure. All alerts are logged viasyslogto a file called "alerts" in the file /var/adm/snort/alerts. Any alerting message found in this file will have corresponding offending network packets logged in the same directory as the alert file but under the IP address of the source packet.
Using the rule in Figure 1, from above:
alert tcp any any -> 192.168.1.0/24 111
(content:"|00 01 86 a5|"; msg: "mountd access";)
WhenSnortinspects and matches the above rule to an offending network packet(s), an alerting message is sent tosyslogstating that a "mountd access" violation has occurred. This message is recorded in the file/var/adm/snort/alertsand the actual network packet(s) causing the alert is recorded in a file based on the source IP address of the offending packet(s), (i.e./var/adm/snort/a.b.c.d).
Some problems may occur when filtering log entries into an IP-named file. For one, multiple alerts may involve one IP address. Under this condition, the offending packets violating each unique rule are sent to the same IP-named file; and mapping the specific alert to the offending packet(s) then demands a search and locate approach that could be time consuming.
SnortIntegration with Other Administrative/Security Tools
Snort's output can be used in concert with the output of other security tools to do the following:
1.corroborate a security event that happened by returning the process and user information of the event
2.identify discrepancies when processes that are reported by programs such asntopandtcpdump.
Tripwire Configuration
The following is thetripwireconfiguration for theSnortprogram once installed. Only a few files, theSnortexecutable,Snort(8) man page, and the snort alert file, require monitoring bytripwire. In addition, files necessary to implement the software (i.e.,libpcap) and the/var/log/snort/directory should be monitored.
The following files should not change, as any changes are unexpected:
@@define BINARY E+pinugsamc1-023456789
/usr/local/bin/snort @@BINARY
/usr/local/man/man8/snort.8 @@BINARY
/var/log/snort/alerts @@BINARY
Acknowledgements
The author would like to thank the developers ofSnortand the author(s) of theSnortweb site. Many of the examples and some documentation were reproduced in part and can be directly attributed to the developer's information as posted on the Snort web site ( http://www.snort.org/). The section entitled "Basics in Writing Snort Rules" was taken in part from the web document " Writing Snort Rules: How to write Snort rules and keep your sanity" by Martin Roesch.
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HACK
#86Write Your Own Snort Rules
Customize Snort for your own needs quickly and easily by leveraging its flexible rule engine and language
[ Discuss ( 0)| Link to this hack]
One of the best features of Snort is its rule engine and language. Snort's rule engine provides an extensive language that enables you to write your own rules, allowing you to extend it to meet the needs of your own network.
A Snort rule can be broken down into two basic parts, the rule header and options for the rule. The rule header contains the action to perform, the protocol that the rule applies to, and the source and destination addresses and ports. The rule options allow you to create a descriptive message to associate with the rule, as well as check a variety of other packet attributes by making use of Snort's extensive library of plug-ins.
Here's the general form of a Snort rule:
actionprotosrc_ipsrc_portdirectiondst_ipdst_port (options)
When a packet comes in, its source and destination IP addresses and ports are then compared to the rules in the ruleset. If any of them are applicable to the packet, then the options are compared to the packet. If all of these comparisons return a match, then the specified action is taken.
Snort provides several built-in actions that you can use when crafting your rules. To simply log the packet that matches a rule, use thelogaction. Thealertaction generates an alert using the method specified in your configuration file or on the command line, in addition to logging the packet. One nice feature is that you can have very general rules and then create exceptions by writing a rule that uses thepassaction. This works especially well when you are using the rules distributed with Snort, but are frequently getting false positives for some of them. If this happens and it's not a security risk to ignore them, you can simply write apassrule for it.
The last two built-in rule actions are used together to dynamically modify Snort's ruleset at runtime. These are theactivateanddynamicactions. Rules that use thedynamicaction are just like alogrule, except they will be considered only after they have been enabled by anactivaterule. To accomplish this, Snort enforces the use of theactivatesandactivated_byrule options in order to know whatdynamicrules to enable once anactivaterule has been triggered. In addition,dynamicrules are required to specify acountoption in order for Snort to limit how many packets the rule will record.
For instance, if you wanted to start recording packets once an exploit of a SSH daemon on 192.168.1.21 was noticed, you could use a couple of rules similar to these:
activate tcp any any -> 192.168.1.21 22 (content:"/bin/sh"; activates:1; \
msg:"Possible SSH buffer overflow"; )
dynamic tcp any any -> 192.168.1.21 22 (activated_by:1; count:100;)
These two rules aren't completely foolproof, but if someone were to run an exploit with shell code against an SSH daemon, it would most likely send the string/bin/shin the clear in order to spawn a shell on the system being attacked. In addition, since SSH is encrypted, strings like that wouldn't be sent to the daemon under normal circumstances. Once the first rule is triggered, it will activate the second one, which will record 100 packets and then stop. This is useful, since you might be able to catch the intruder downloading or installing a root kit within those first few packets and be able to analyze the compromised system much more quickly.
You can also define custom rule actions, in addition to those that Snort has built-in. This is done with theruletypekeyword:
ruletype redalert
{
type alert
output alert_syslog: LOG_AUTH LOG_ALERT
output database: log, mysql, user=snort dbname=snort host=localhost
This custom rule action tells Snort that it behaves like thealertrule action, but specifies that the alerts should be sent to the syslog daemon, while the packet will be logged to a database. When defining a custom action, you can use any of Snort's output plug-ins, just as you would if you were configuring them as your primary output method.
Snort's detection engine supports several protocols. Theprotofield is used to specify what protocol your rule applies to. Valid values for this field areip,icmp,tcp, andudp.
The next fields in a Snort rule are used to specify the source and destination IP addresses and ports of the packet, as well as the direction the packet is traveling. Snort can accept a single IP or a list of addresses. When specifying a list of IP address, you should separate each one with a comma and then enclose the list within square brackets, like this:
[192.168.1.1,192.168.1.45,10.1.1.24]
When doing this, be careful not to use any whitespace. You can also specify ranges of IP addresses using CIDR notation, or even include CIDR ranges within lists. Snort also allows you to apply the logical NOT operator (!) to an IP address or CIDR range to specify that the rule should match all but that address or range of addresses.
As with IP addresses, Snort can accept single ports as well as ranges. To specify a range, use a colon character to separate the lower bound from the upper bound. For example, if you wanted to specify all ports from 1 to 1024, you would do it like this:
1:1024
You can also apply the NOT operator to a port, and you can specify a range of ports without an upper or lower bound.
For instance, if you only wanted to examine ports greater than 1024, you would do it this way:
1024:
Similarly, you could specify ports less than 1024 by doing this:
:1024
If you do not care about the IP address or port, you can simply specifyany.
Moving on, the direction field is used to tell Snort which IP address and port is the source and which pair is the destination. In earlier versions of Snort you could use either->or<-to specify the direction. However, the<-operator was removed since you can make either one equivalent to the other by just switching the IP addresses and port numbers. Snort does have another direction operator in addition to->, though. Specifying<>as the direction tells Snort that you want the rule to apply bidirectionally. This is especially useful when using log rules or dynamic rules, since you can log both sides of the TCP stream rather than just one direction.
The next part of the rule includes the options. This part lets you specify many other attributes to check against. Each option is implemented through a Snort plug-in. When a rule that specifies an option is triggered, Snort will run through the option's corresponding plug-in to perform the check against the packet. Snort has over 40 plug-ins—too many to cover in detail in this hack. Here are some of the more useful ones.
The single most useful option ismsg. This option allows you to specify a custom message that will be logged in the alert when a packet matching the rule is detected. Without it, most alerts wouldn't make much sense at first glance. This option takes a string enclosed in quotes as its argument.
For example, this specifies a logical message whenever Snort notices any traffic that is sent from 192.168.1.35:
alert tcp 192.168.1.35 any -> any any (msg:"Traffic from 192.168.1.35";)
Be sure not to include any escaped quotes within the string. Snort's parser is a simple one and does not support escaping characters.
Another useful option iscontent, which allows you to search a packet for a sequence of characters or hexadecimal values. If you are searching for a string, you can just put it in quotes. In addition, if you want it to do a case-insensitive search, you can addnocase;to the end of all your options. However, if you are looking for a sequence of hexadecimal digits, you must enclose them in|characters.
This rule will trigger when it sees the digit 0x90:
alert tcp any any -> any any (msg:"Possible exploit"; content:"|90|";)
This digit is the hexadecimal equivalent of the NOP instruction on the x86 architecture and is often seen in exploit code since it can be used to make buffer overflow exploits easier to write.
Theoffsetanddepthoptions can be used in conjunction with thecontentoption to limit the searched portion of the data payload to a specific range of bytes.
If you wanted to limit content matches for NOP instructions to between bytes 40 and 75 of the data portion of a packet, you could modify the previously shown rule to look like this:
alert tcp any any -> any any (msg:"Possible exploit"; content:"|90|"; \
offset:40; depth:75;)
You can also match against packets that do not contain the specified sequence by prefixing it with a!. In addition, many shell code payloads can be very large compared to the normal amount of data carried in a packet sent to a particular service. You can check the size of a packet's data payload by using thedsizeoption. This option takes a number as an argument. In addition, you can specify an upper bound by using theoperator. Upper and lower bounds can be expressed with<>.
For example:
alert tcp any any -> any any (msg:"Possible exploit"; content:"|90|"; \
offset:40; depth:75; dsize: >6000;)
This modifies the previous rule to match only if the data payload's size is greater than 6000 bytes, in addition to the other options criteria.
To check the TCP flags of a packet, Snort provides theflagsoption. This option is especially useful for detecting portscans that employ various invalid flag combinations.
For example, this rule will detect when the SYN and FIN flags are set at the same time:
alert any any -> any any (flags: SF,12; msg: "Possible SYN FIN scan";)
Valid flags areSfor SYN,Ffor FIN,Rfor RST,Pfor PSH,Afor ACK, andUfor URG. In addition, Snort lets you check the values of the two reserved flag bits. You can specify these by using either1or2. You can also match packets that have no flags set by using0. There are also several operators that theflagsoption will accept. You can prepend either a+,*, or!to the flags, to match on all the flags plus any others, any of the flags, or only if none of the flags are set, respectively.
One of the best features of Snort is that it provides many plug-ins that can be used in the options field of a rule. The options discussed here should get you off to a good start. However, if you want to write more complex rules, consult Snort's excellent rule documentation, which contains full descriptions and examples for each of Snort's rule options. The Snort User's Manual is available at http://www.snort.org /docs/writing_rules/.
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Write Your Own Snort Rules - O'Reilly Media
Customize Snort for your own needs quickly and easily by leveraging its flexible rule engine and language. ... One nice feature is that you can have very general rules and then create exceptions by ...
oreilly.com/pub/h/1393
Writing rules and understanding alerts for Snort
Snort is a lightweight network intrusion detection system created by Martin Roesch (see http://www. snort .org). Snort is ...
www.cse.sc.edu/../i042.14.html
3.2 Rules Headers - SNORT Users Manual 2.9.6
You can then use the rule types as actions in Snort rules. This example will create a type that will log to just tcpdump:.
manual.snort.org/node29.html
Writing Snort Rules - USSRBack
All of the elements in that make up a rule must be true for the indicated rule action to be taken. When taken together, the ...
www.ussrback.com/../snort_rules.htm
[PDF] Working with Snort Rules - Pearson
mation about these signatures is used to create Snort rules. As men- tioned in Chapter 1, you can use honey pots to find ...
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PAPER - 1 : FINANCIAL REPORTING
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4/30Auction II: Combinatorial Auctions
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IBM WebSphere Commerce
WebSphere Commerce
Developer(s) IBM
Stable release7.0 with fix pack 5 ( 7.0.0.6) / 6/29/2012
Operating system Cross-platform
Type Internet application
License Proprietary
Website Official website
IBM WebSphere CommerceAKA WCS (WebSphere Commerce Suite) is a software platform framework for e-commerce, including marketing, sales, customer and order processing functionality in a tailorable, integrated package. It is a single, unified platform which offers the ability to do business directly with consumers ( B2C), with businesses ( B2B), indirectly through channel partners ( indirect business models), or all of these simultaneously. WebSphere Commerce is a customizable, scalable and high availability solution built on the Java- Java EEplatform using open standards, such as XML, and Web services.
Versions
It all started back in 1996, [ 1 ]with a product calledNet.Commerce(V1.0, V2.0, V3.1, and V3.2). In 2001 Net.Commerce was renamed toWebSphere Commerce Suite, releasing versions V4.1 and V5.1. In 2002WebSphere CommerceV5.4 was released, followed by V5.5 in 2003, V5.6 in 2004 and V5.6.1 in 2005. The latest major release versions are:
*.In 2006Version 6.0 [ 2 ]
*.In 2009Version 7.0 [ 3 ]
There are three editions of WebSphere Commerce software. Each edition provides an increasing set of functionality in comparison: [ 4 ]
*.Express [ 5 ]
*.Professional [ 6 ]
*.Enterprise [ 7 ](note: previously known as Business Edition)
Since WebSphere Commerce is a highly customizable solution, IBMprovides an integrated development environment which is used to build and test customizations, extend business logic, change the look and feel of the store and tools, and create a new logic to meet business requirements. The developer platform used for developing and customizing the solution is called IBM WebSphere Commerce Developer. So there are also 3 editions of the developer environment, matching their runtime environments (e.g. WebSphere Commerce Developer Express, WebSphere Commerce Developer Professional, and WebSphere Commerce Developer Enterprise). [ 8 ]
As with other IBM products that are also customizable, WebSphere Commerce Developer toolkit runs within IBM Rational Application Developer for WebSphere Software (RAD)as the foundation of Java IDE, and RAD extends Eclipseenvironment with visual and other development features. [ 9 ]
A specific WebSphere Commerce version uses a specific version of RAD, for example:
*.WebSphere Commerce Developer V6 is based on RAD V6.
*.WebSphere Commerce Developer V7 is based on either IBM Rational Software Architect(RSA) or RAD V7.5.
Migration
Migrating to a new version of WebSphere Commerce is done by WebSphere Commerce Migration Wizard, an interactive wizard that guides the user through each phase of the migration process, performing various tasks. [ 10 ]
Primary components of the solution
As with most Web applications, WebSphere Commerce has 3 main components:
*.A database
*.An application server (Java EE)
*.A web server
Databases which are supported with WebSphere Commerce V7 are: [ 11 ]
*. IBM DB2on various platforms (i.e. Windows, AIX, Solaris, Linux, IBM i), provided with the product
*. Oracle
*. Apache Derby(for developer only), provided with the WebSphere Commerce Developer product.
Application server which is supported with WebSphere Commerce is IBM WebSphere Application Server, is also provided with the product.
Supported Web servers are:
*. IBM HTTP Server, provided with the product
*. Microsoft Internet Information Services (IIS)
*. Sun Java System Web Server
*.IBM HTTP Server for i5/OS
Operating Systems
The following operating systemsare supported for WebSphere Commerce V7: [ 12 ]
*. IBM AIX Version 7.1 (64–bit), IBM AIX Version 6.1 (64–bit), IBM AIX Version 5.3 (64–bit)
*. Linux on IBM Power Systems, Linux on System x and other Intel based processor systems, Linux on System z
*. Red Hat Enterprise Linux
*. SUSE Linux Enterprise Server
*. (Oracle) Solaris 10 for SPARC
*. Microsoft Windows Server 2008 (32 and 64–bit operating system), Microsoft Windows Server 2003 (32 and 64–bit operating system)
*. IBM i V7.1 and IBM i V6.1
WebSphere Commerce Developer V7 supported operating systems: [ 13 ]
*. Windows 7 (since Fix Pack 7.0.0.2), Windows Vista, Windows XP, Windows Server 2003, Windows Server 2008
Enhancements (new features)
Additional featuresare continuously provided through Enhancements.
In addition to the features that are already provided within WebSphere Commerce base product, some additional new features are provided regularly by WebSphere Commerce Enhancements or so called Feature Packs. These enhancements are delivered as installable packages, some sample reference applications or documented solutions.
WebSphere Commerce Feature Packs include new features (so called enhancements). These enhancements add some new functionality or features to the base product. Feature Pack differs from a fix pack, which is a set of correction fixes to the base code. Fix Packs and Feature Packs within a certain release are cumulative. [ 14 ]
Feature Pack contains multiple features that are installed as one package, and can be enabled individually. A feature provides a functional extension to the existing base product functionality.
WebSphere Commerce V7 enhancements at a glance
Deliver a Smarter Shopping Experience
WebSphere Commerce V7.0 Feature Pack 5.0 is cumulative, and it consolidates capabilities of Feature Pack 4.0, 3.0, 2.0 and 1.0 in addition to some new capabilities.
WebSphere Commerce V7 Feature Pack 5:
*.Order management enhancements
*.Commerce enhancements (Aurora starter store, Coshopping, Page Layout tool, integrated search and enhanced business user tooling)
*.Complete order life cycle coverage and Sterlingintegration
WebSphere Commerce V7 Feature Pack 4:
*.Starter stores optimized for mobile devices
*.Facebook integration allows shoppers to click and share
*.Programming model enhancements
WebSphere Commerce V7 Feature Pack 3:
*.Tighter analytics, configurator, and order management integration
*.Precision marketing triggers
*.Integrated search solution enhancements
*. SEOenhancements
*.Enhanced business user tools
*.Customer benefits
WebSphere Commerce V7 Feature Pack 2:
*.Product Subscription
*.Search
*.Social bridging
*.Co-shopping
*.Service provider [ 15 ]
*.Pricing
*.Analytics
*.Foundational leadership [ 16 ]
WebSphere Commerce V7 Feature Pack 1:
*.Foundation
*.Management Center
*.Starter store enhancements
*.Social Commerce
*.Remote widgets [ 17 ]
*.Digital wallet
*.IBM Gift Center for the Madisons starter store
See also these pages for someFurther information:
*. What's new
*. New IBM Commerce solutions deliver enhanced cross-channel selling and order management capabilities
WebSphere Commerce V6 enhancements at a glance
Transforming the Online Shopping Experience with Web 2.0 and SOA
Customer empowerment (Feature Pack 1, Feature Pack 2 and Feature Pack 5)
WebSphere Commerce V6 Feature Pack 1
*.Coremetrics for IBM WebSphere Commerce auto tagging utility (i.e. enhanced Web analytics)
*.Coremetrics Tag Library support for WebSphere Commerce versions 5.6 and 5.6.1
*.Coremetrics reports for WebSphere Commerce
*.WebSphere Commerce and content management system integration with WebSphere Portal 5.1.0.4
*.Enhanced search and navigation by integrating to IBM OmniFind Discovery Edition
WebSphere Commerce V6 Feature Pack 2
*.WebSphere Commerce Web 2.0store solution (note: replaced by Feature Pack 5 Madisons store solution)
*.WebSphere Commerce integration with sitemaps
*.Reports for IBM Sales Center for WebSphere Commerce [ 18 ]
*.Reports for e-mail campaigns
*.WebSphere Commerce and content management system integration with WebSphere Portal6.0
*.Contract terms and conditions
WebSphere Commerce V6 Feature Pack 5
*.Madisons store
Web 2.0 starter store with a streamlined purchasing process (note: this starter store replaces the Feature Pack 2 Web 2.0 store).
*.Buy Online, Pickup In-Store
Cross-channel support by using Distributed Order Management (DOM) solution integration. [ 19 ] [ 20 ]
Front-office integration (Feature Pack 2)
*.WebSphere Commerce Portal integration
IBM Management Center for WebSphere Commerce (Feature Pack 3, 3.0.1, and 4)
*.IBM Management Center for WebSphere Commerce business user tool
Back-office integration using SOAenhancements (Feature Pack 1)
*.Improved Service Orientation and Web servicessupport for back-office integration, including JCA adapters for Web Services, reference applications and pre-defined Web Services for integration with Enterprise Resource Planning (ERP) and Order Management Systems (OMS)
*.WebSphere Commerce and SAP system integration
*.WebSphere Commerce and Sterling Customer Order Management PCA (Sterling COM PCA) integration
Paymentech plug-in for WebSphere Commerce (Feature Pack 2)
*.Paymentech plug-in for WebSphere Commerce
*.Compliance with Payment Card Industry (PCI) Security Standards
See also these pages for someFurther information:
*. What's new
*. Enhancements for version 6.0
Solutions
WebSphere Commerce provides a number of solutions [ 21 ]and has numerous partners, which are building further customizations [ 22 ] [ 23 ] [ 24 ] [ 25 ]
Notes
1. ^ IBM Archives 1996, IBM. Accessed on 2010-06-10.
2. ^ WebSphere Commerce InfoCenter v6, IBM. Accessed on 2010-06-10.
3. ^ WebSphere Commerce InfoCenter v7, IBM. Accessed on 2010-06-10.
4. ^ Compare editions, IBM. Accessed on 2010-06-10.
5. ^ WebSphere Commerce Express, IBM. Accessed on 2010-06-10.
6. ^ WebSphere Commerce Professional, IBM. Accessed on 2010-06-10.
7. ^ WebSphere Commerce Enterprise, IBM. Accessed on 2010-06-10.
8. ^ WebSphere Commerce Developer Editions, IBM. Accessed on 2010-06-10.
9. ^ Rational Application Developer for WebSphere Software, IBM. Accessed on 2010-06-10.
10. ^ WebSphere Commerce Migration Wizard, IBM. Accessed on 2010-08-14.
11. ^ WebSphere Commerce Version 7 software requirements, IBM. Accessed on 2010-08-28.
12. ^ Operating system prerequisites for installing WebSphere Commerce, IBM. Accessed on 2011-10-29.
13. ^ WebSphere Commerce Developer hardware, software, and network prerequisites, IBM. Accessed on 2011-10-29.
14. ^ Fix Packs for WebSphere Commerce products, IBM. Accessed on 2010-07-31.
15. ^ Web services and WebSphere Commerce, IBM. Accessed on 2012-05-27.
16. ^ Highlights of WebSphere Commerce Version 7, IBM. Accessed on 2012-05-27.
17. ^ Remote widgets, IBM. Accessed on 2012-05-27.
18. ^ IBM Sales Center for WebSphere Commerce, IBM. Accessed on 2010-06-10.
19. ^ Cross-Channel Commerce, IBM. Accessed on 2012-05-27.
20. ^ Distributed Order Management (DOM) integration, IBM. Accessed on 2012-05-27.
21. ^ IBM WebSphere Commerce product line, IBM. Accessed on 2010-07-31.
22. ^ WebSphere Commerce Leadership Summit 2009, IBM. Accessed on 2010-07-31.
23. ^ WebSphere Commerce Leadership Summit 2010, IBM. Accessed on 2010-07-31.
24. ^ Smarter Commerce Global Summit 2011, IBM. Accessed on 2011-10-29.
25. ^ IBM Smarter Commerce Global Summit 2012 Madrid, IBM. Accessed on 2012-05-27.
Last modified on 27 December 2013, at 21:12
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Professional notes for all students
CS 701: Electronic Commerce
Course homepage
Announcements:
*.(May 7) Evaluations: An evaluation form ( Word-formatted version) has been emailed to you. Please print, fill out anonymously and bring your form to the final exam.
*.(April 18) Clarification: the final report is due on April 26th. (The date on top of the guidelines was from last year).
*.(April 16) Note that we will subject your site to intensive testing following April 26 - it is your responsibility to ensure the site is up and running.
*.(April 16) Reminder: final reports are due April 26.
*.(April 10) An additional documentation requirement added to the final deliverables - see the final report guidelines.
*.(April 10) May 10 is final exam date for CS701. Accordingly, we will require that your sites remaining operational until 5pm, May 10.
*.(April 10) We are going to invite several external visitors (students in ecommerce courses offered at some other universities) to browse your sites. To let them send you comments, you need to include an email address on your site, preferably on every page. This email does not have to be "real", it could simply be the SEAS email address of one (or more) of your team members.
*.(April 9) The presentation schedule is now in the final report guidelines.
*.(Mar 27) For Phase III, allow passworded entry to your sites. Please email me (Simha) your site passwordbeforeApril 5.
*.(Mar 3) Clarification: the Phase II technical requirements are due March 8.
*.(Feb 11) There was a typo in the technical schedule. The requirements listed under the Phase I bullet are due for Phase I.
*.This website for the class will be used in tandem with the Prometheus site until all new material is uploaded into Prometheus.
*.Here are the team assignments.
*.For those of you not quite familiar with Unix, here is an elementary tutorialin postscript. The tutorial covers basic Unix, the Emacs editor and Latex. However, note that it was written for thetcshshell and not GWU'sksh. For more information on the local Unix flavor, see the SEAS computing website
Spring 2001 information:
*.Instructor:This course has several instructors -Prof. Shelly Heller (sheller@ seas.gwu.edu), Prof. Deepak Kumar (dkumar@ seas.gwu.edu), Prof. Rob Lindeman (gogo@ seas.gwu.edu), Prof. Bhagi Narahari (narahari@ seas.gwu.edu), Prof. Srinivas Prasad (prasad@ gwu.edu), Prof. Rahul Simha (simha@ seas.gwu.edu).
*.Office Hours:Prof. Shelly Heller (by appt - send email), Prof. Rob Lindeman (by appt - send email), Prof. Bhagi Narahari (by appt - send email), Prof. Srinivas Prasad (by appt - send email), Prof. Rahul Simha (Mon, Tue 3.30-5.30),
*.Office:Prof. Shelly Heller (718), Prof. Rob Lindeman (707), Prof. Bhagi Narahari (720F or Chair's office), Prof. Srinivas Prasad (email only, or in class), Prof. Rahul Simha (Room 717, Phillips Hall).
*.Class Time/Place:
*.Thursdays, 6.10 - 8.45pm
Most lectures in Phillips 110, special lectures in Tompkins 411.
*.Prerequisites:
*.CS 141 for Computer Science students. (See undergraduate curriculum)
*.Course description:
*.Topics include: network infrastructure for e-commerce; overview of web technology; examples of web-based businesses; economics and business models of web-based businesses; the electronic storefront; security; electronic payment systems; social, legal, ethical and public policy issues; finance and business-plan creation. Students will form teams, develop a web-based business and participate in a mock economy created in class. Students will explore issues related to their disciplines, if applicable. Computer science students will have a different set of requirements from non-CS students, as they will provide technical expertise learned in their courses to interdisciplinary teams that engage in e-commerce projects. The non-CS students in the course will attend to business, social, ethical and legal aspects of the projects, and will engage in programming only up to their level of ability or interest. Teams will be formed so that each team has at least one technical student. The teams will be required to develop web-based mock businesses as a project. Course instruction will include a basic core of lectures on economics, business, and writing a business plan, and specialized lectures in advanced web technology -- for example, Java servlets -- for (only) the technical (CS) students. Thus, CS students will continue to receive instruction in web computing technology and will have significant software projects required of them, whereas students in other disciplines will be exposed to the possibilities and limitations of computing via the e-commerce application. The course is expected to provide all students with valuable interdisciplinary team work experience. Goals: This course will provide a forum for students from various disciplines to work in a team. By approximately simulating real world team compositions, it hopes to improve communication skills and foster constructive attitudes towards team work.
*.Textbook:There is no official textbook for the course.Resources:
*.Java references:
*.Books:
*.Java in a Nutshell, 3rd edition.D.Flanagan.(O'Reilly. ISBN 1-56592-262-X).A concise introduction to Java containing a handy but terse summary of the Java library. The 3rd edition now covers Java 1.2 and is probably one of the least expensive Java books on the market.Cost: $30without CDROM.
*.Java Enterprise in a Nutshell.D.Flanagan.(O'Reilly).A companion book to the Nutshell, it contains code examples for servlets and related packages.Cost: $25without CDROM.
*.Java Servlet Programming.J.Hunter.(O'Reilly).A thorough introduction to Java servlets.Cost: $40 (approx)
*.Websites:
*. SUN's Java documentation homepage (tutorials, API documentation etc)
*. SUN's Java tutorial
*. SUN's documentation of the Java 1.2 library
*. SUN's documentation of the Java 1.2 library
*. UsefulJava links maintained at Sunsite, including FAQ's.
*.HTML references:
*. An elementary HTML tutorial(In plain text).Coursework and Course Policies
NOTE: The contents of this page may change slightly over the semester, and additions may be made to the page. In particular, the point-weightage and due-dates are approximate at this time, and may change.
*.Coursework:
*.Note-taking: 15 points.
*.Complete business plan: 20 points (includes: financial model, marketing plan and business model).
*.Creating a working website: 30 points.
*.Final presentations and final reports: 25 points.
*.Weekly questions: 5 points.
*.Final exam: 15 points.TOTAL: 110 points
*.Details:
*.Note taking:
*.Each student will be required to participate in a note-taking exercise: you will be assigned a lecture that you will transcribe into HTML. The purpose is twofold: (1) you will help in creating material for your colleagues to use in lieu of a textbook; (2) in creating a coherent account of a lecture, you will not only enhance your learning experience, but will also practice writing.
*.Examine the list of note-taking assignments below to find out which lecture you have been assigned, and look at the note-taking guidelinesfor submission.
*.Business Plan
*.Each team will be responsible for creating a business plan around which to build their website.
*.The business plan is to be submitted in two parts. The first part is a simple 2-page outline describing the business, together with an overview of the business model; this part will be due early in the semester. The second part is a complete business plan due in the middle of the semester.
*.Read the Business Plan Guidelinesfor more information.
*.Marketing Plan
*.Each team will be responsible for creating a marketing plan in addition to their business plan.
*.Like the business plan, the marketing plan is to be submitted in two parts. The first part is a simple 1-page outline; this part will be due early in the semester. The second part is a complete marketing plan due in the middle of the semester.
*.Read the Marketing Plan Guidelinesfor more information.
*.Operational site:
*.Each team will build and demonstrate a working website with features that implement their business plan.
*.There will be a preliminary "design" evaluation towards the middle of the semester, and a final evaluation at the end of the semester.
*.Site evaluation:
*.Apart from checking that the site features work in a technical sense, we will evaluate the quality of the site from the point of usability, correlation with business plan, creativity, novelty, attractiveness etc.
*.This evaluation will only take place at the end of the semester.
*.Final report:
*.Each team will submit a final report at the end of the semester.
*.Read the Final Report Guidelinesfor more information.
Important dates:lectures, due dates etc (subject to change)
*.Thu, Jan 18:Introduction - Prof. Lindeman
*.Thu, Jan 25:
Technology overview for non-CS majors (Olga Gelbart, Phillips 110, powerpoint-slides).
Notes: Caroline Jung, Colleen Rooney
Java Servlets for CS majors(Prof. Simha - in Tompkins 411, no notes required).
*.Thu, Feb 01:
Business plans - Prof. Prasad ( powerpoint-slides)
Notes: Amy Marra, Judith Phruksaraj
*.Thu, Feb 8:
Marketing plans - Prof. Prasad
Notes: Ramnik Dhaliwal, Amit Kapoor
*.Business plan outline (1 page) due Thu Feb 16
*.Thu, Feb 16:
Mobile agents and Ecommerce for non-CS students (Olga Gelbart - in Phillips 110, ( powerpoint-slides),
Notes: Brion Tingler, Daniel Lee
Java Server Pages for CS students- Prof. Kumar (no notes required, Tompkins 411)
*.Marketing plan outline (1 page) due Thu Feb 23
Phase I technical requirement due Thu Feb 23(See the technical schedulefor details).
*.Thu, Feb 23:
Computing infrastructure for large-scale financial systems - Jacob Lindeman (Fidelity Corp.) ( PDF-slides),
Notes: Scott Herman, Sam Leiber
Host: Prof. Lindeman
*.Thu, Mar 01:
Part 1: Commercial ecommerce software: S.Bhargava ( powerpoint-slides)
Part 2: Secure payment systems - Prof. Muftic. ( PDF)
Notes: Howard Sherman, Ray Tiong
Host: Prof. Simha
*.In-class mid-semester review of sites, Thu Mar 8
Phase II technical requirement due Thu Mar 8
*.Thu, Mar 8:
Search Engines - Paul Ryan ( GoTo.com) ( powerpoint-slides),
Notes: Matt Norris, George Brieger
Host: Prof. Kumar
*.Thu, Mar 15:
Parts 1 and 2: Policy, Law and Ethics in Ecommerce: Prof. Martin, Edwin Behrens.
( Click here for more info and readings list)
Notes: Witold Chrabaszcs, Alex Rud
Host: Prof. Narahari
*.Thu, Mar 24:No class - Spring Break
*.Thu, Mar 29:
Part 1: Information Security Policy - Prof. Hoffman ( powerpoint-slides)
Part 2: Intellectual Property Rights: Prof. Millien ( PDF-slides)
Notes: Sergei Mikhailov, Chris Vanderveer
Host: Prof. Simha
*.Phase III technical requirement due Thu Apr 5
Complete business plan due Thu Apr 5
Complete marketing plan due Thu Apr 5
*.Thu, Apr 5:
Data Mining - Prof. Narahari ( powerpoint-slides)
Notes: Saiyd Copeland, Jon Rosen
*.Thu, Apr 12:
B2B - Barry Lerner (VP, Exostar).
Notes: Phil Wassibauer
Host: Prof. Kumar
*.Thu, Apr 19:Team presentations.
*.Final website ready, and final report due Thu, Apr 26
*.Thu, Apr 26:Team presentations.
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Brief Description: Introduction to Electronic Commerce . ... Executive Summary and Chapter 1 of The Digital Dilemma.
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