pfck - pf check - organizes flow information by host
pfck is a perl script that reads the state table of pf and reports back flows based on a supplied port number. pfck is very handy in ddos attacks to identify who's hitting a host or network on a particular port service, and who they are specifically hitting.
IP Tables State implements the "state top" feature from IP Filter for IP Tables. "State top" displays the states held by your stateful firewall in a "top"-like manner, in real time. IPTState also has an option to print your state table once and
NOTE: Development has moved to github: http://github.com/jaymzh/iptstate
The Cisco Connection Analyzer will analyze a real time snap shot of your PIX/ASA connection table and tell you useful information about the conn table. It will tell you top talkers, top services..etc. Very useful in troubleshooting the firewall.
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This script reads your iptables-based firewall configuration and displays your rules in the order in which packes will actually traverse them. Output is intuitive while closely resembling that of iptables-save, and indicates table ownership of rules, etc
Bruteblock allows system administrators to block various bruteforce attacks on UNIX services. The program analyzes system logs and adds attacker's IP into IPFW table effectively blocking them. Addresses are removed from the table after expiration period
This Daemon written in Perl, logs FreeBSD ipfw ip accounting counters every X seconds/minutes, so after rebooting, crashing, flushing, zero out your ipfirewall table, you don't loose any mayor traffic information.
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Who is jiggling the door of your SMC Barricade firewall? This
script will connect to one of those devices via the web interface,
authenticate, grab the event log and then re-write the output as a
simple HTML table.