Snort 3.0 - Network intrusion prevention and detection system (IDS/IPS)

Snort is the most powerful IPS in the world, setting the standard for intrusion detection. So when we started thinking about what the next generation of IPS looked like we started from scratch.

Features

• Support multiple packet processing threads
• Shared configuration and attribute table
• Use a simple, scriptable configuration
• Make key components pluggable
• Autodetect services for portless configuration
• Support sticky buffers in rules
• Autogenerate reference documentation
• Provide better cross platform support

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[Snort 2.9.5] Network intrusion prevention and detection system (IDS/IPS)

Snort® is an open source network intrusion prevention and detection system (IDS/IPS) developed by Sourcefire. Combining the benefits of signature, protocol, and anomaly-based inspection, Snort is the most widely deployed IDS/IPS technology worldwide. With millions of downloads and nearly 400,000 registered users, Snort has become the de facto standard for IPS.

[*] New additions

* Added tracking of FTP data channel for file transfers as file_data for Snort rules.

* Add support for doing PAF based on services loaded thru the attribute table and hardened PAF code/removed --disable-paf

* Added decoding support for Cisco ERSPAN

* Added tracking of HTTP uploads as file_data for Snort rules.

* Added ability to use event filters with PPM rules

* Added a control channel command to reload the Snort configuration to give feedback on new configuration.  This improves on the older sigHUP which would just result in Snort exiting and restarting if the new configuration required a restart.

* Added a configuration option to perfmon to write flow-ip data to a file

* New decoding alert for IPv6 Routing type 0 header.

* Added the ability to sync basic session state from one Snort to another via a side channel communication between the two Snort instances.  NOTE:  This is currently experimental.

[*] Improvements

* Improved Stream's midstream pickup handling for TCP state processing,

  sequence validation, and reassembly.  Thanks to John Eure.

* Added a parse error for a rule if there is a relative content used after a content that is 'fast_pattern only'.

* Improved HTTP PAF reassembly capabilities to be better aligned on PDU boundaries, terminate if not actually HTTP, and to include all appropriate line feeds.

* Hardened the code related to dynamic modules.  Removed --disable- dynamicplugin configuration option since rule and preprocessor shared libraries are here to stay.

* Improved parsing of IP lists for reputation

* Update to Teredo processing and Snort rule evaluation when the inner IPv6 packet doesn't have payload.  Thanks to Yun Zheng Hu & L0rd Ch0de1m0rt for reporting the issue & crafting traffic to reproduce. 

* Improved logging of packets associated with alerts when a Stream reassembled packet triggers multiple Snort rules.

* Improvements to the Snort manual including documentation of specific rule options and configuration items.  Thanks to Nicholas Horton and many others.

* Removed a bunch of dead code paths, updated to use more current memory functions for easier code maintenance and portability.  Thanks to William Parker.

[*] Deletions

* Remove deprecated unified support, use unified2 for all of your logging needs.

Download Snort 2.9.5

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[Topera] The IPv6 port scanner invisible to Snort (IDS)

Topera is a brand new TCP port scanner under IPv6, with the particularity that these scans are not detected by Snort.

Snort is the most known IDS/IPS and is widely used in many different critical environments. Some commercial tools (Juniper or Checkpoint ones) use it as detection engine also.

Mocking snort detection capabilities could suppose a high risk in some cases.

All the community is invited to test it in any environment and we would be thankful if you send us any feedback.

We keep researching on the security implications that the "new" IPv6 protocol will have in different environments. 

You can see an example of execution of Topera here: 
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[Snort 2.9.4.1] Network Intrusion Detection System

Snort is a free and open source network intrusion prevention system (NIPS) and network intrusion detection system (NIDS) . Snort having the ability to perform real-time traffic analysis and packet logging on Internet Protocol (IP) networks. Snort performs protocol analysis, content searching, and content matching.

The program can also be used to detect probes or attacks, including, but not limited to, operating system fingerprinting attempts, common gateway interface, buffer overflows, server message block probes, and stealth port scans. Snort can be configured in three main modes: sniffer, packet logger, and network intrusion detection.

Improvements in Snort 2.9.4.1

• Updated File processing for partial HTTP content and MIME attachments.
• Addition of new config option max_attribute_services_per_host and improve memory usage within attribute table.
• Handle excessive overlaps in frag3.
• Stream API updates to return session key for a session.
• Reduce false positives for TCP window slam events.
• Updates to provide better encoding for TCP packets generated for respond and react.
• Disable non-Ethernet decoders by default for performance reasons. If needed, use --enable-non-ether-decoders with configure.

Download Snort 2.9.4.1

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