Pytbull alternatives

Chiron is a security assessment framework for IPv6. It provides several modules including an IPv6 scanner, IPv6 Local Link, IPv4-to-IPv6 proxy, IPv6 attack module, and IPv6 proxy. These modules help to perform an assessment, like a penetration test.

The tool uses IPv6 extension headers to create a headers chain. This may allow evading security devices like IDS, IPS, and firewalls. Due to the flexibility of the framework, the tool can also be used to perform fuzzing of the IPv6 stack of a device.

Besides intrusion detection, Snort has the capabilities to prevent attacks. By taking a particular action based on traffic patterns, it can become an intrusion prevention system (IPS).

Suricata is a somewhat younger NIDS, though has a rapid development cycle. It can work with Snort rulesets, yet also has optimized rulesets for usage with Suricata itself. For example, this set is known as Emerging Threats and fully optimized.

OSSEC uses a centralized, cross-platform architecture allowing multiple systems to be monitored and managed.

Highlights:
The OSSEC project was acquired by Third Brigade, Inc in June 2008. This included the copyrights owned by Daniel Cid, its project leader. They promised to continue the development, keep it open source, and extend commercial support and training to the community.

Trend Micro acquired Third Brigade in May 2009. This included the OSSEC project. Trend Micro promised to keep the software open source and free.

Samhain is a host-based intrusion detection system (HIDS). It provides file integrity checking and log file monitoring/analysis. Additional features are rootkit detection, port monitoring, detection of rogue SUID executables, and the detection of hidden processes.

Samhain is typically deployed as a standalone application, although it supports centralized logging. This makes it ideal for environments with multiple systems.

Samhain is open source software and written by Rainer Wichmann.

Zeek helps to perform security monitoring by looking into the network's activity. It can find suspicious data streams. Based on the data, it alert, react, and integrate with other tools.