ClarkConnect is a powerful yet easy-to-use server/gateway software solution designed for the small/medium-sized organization. The software provides all the necessary server tools to run an organization: email, antivirus, antispam, file sharing, groupware, VPN, firewall, intrusion detection/prevention, content filtering, bandwidth management, multi-WAN and more.
Netcat is a simple Unix utility which reads and writes data across network connections, using TCP or UDP protocol. It is designed to be a reliable backend tool that can be used directly or easily driven by other programs time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities.
Sysmon is a network monitoring tool designed to provide high performance and accurate network monitoring. Currently supported tests include monitoring of SMTP, IMAP, HTTP, TCP, UDP, Radius, NNTP, and POP3 servers. It also includes the ability to ping hosts and routers, as well as the ability to perform SNMP queries and generate alerts based on those results. Sysmon has the ability to understand real network topologies, including the ability to monitor multiple paths and only report the actual device that is down instead of a router that is down, and all the hosts behind it.
The Spoofaudit network auditing tool will help you to determine what basic spoofing filters (rfc2827 & rfc3013) are present between two test points on two networks, and what anti-spoofing filters are missing. The tools are designed to work between endpoints that would not normally have filtering between them except anti-spoofing filters.
netscript is a portable/multi-platform, lightweight TCP/UDP socket scripting system. It is intended to automate situations, built on a word-to-word ruleset response system. It includes wildcard support, character replacement, random replacement, argument inclusion, server timeout, initial send, display altering, multiple character dump formats, telnet protocol support, logging, program to socket dumping, executable ruleset support, reverse binding, module support, data truncation, data formatting, permission options, virtual hosting support, history storage, dynamic storage variables, directory placement, character omitting, timed rules, background support, syslog support, routing support, socket options, interactive mode, and graphical user interface support.
SMCRoute is a daemon and command line tool to manipulate the multicast routes of the Linux kernel. It can be used as an alternative to dynamic multicast routers like 'mrouted' in situations where (only) static multicast routes should be maintained and/or no proper IGMP signaling exists.