Open Source Yacc Networking Software for Linux

ITVal is an analysis tool for evaluating iptables firewall systems. It provides an easy way for a system administrator to verify that his firewall provides the protection he thinks it does. ITVal can analyze multiple NAT'd firewalls connected serially.

NetProg is an API in C language allowing an homogeneous programming of communicating applications on many operating systems. It covers all the need for applications that requires complex way of exchanging data in synchronous or asynchronous mode. Based on messages for exchanging data between clients and servers, it, moreover, access databases or files with the same message modelling.

Mudpit is an intelligent, modular and reliable spool processor for Snort's unified format.