fwknop implements an authorization scheme called Single Packet Authorization that requires only a single encrypted packet to communicate various pieces of information, including desired access through an iptables, ipfw, or pf firewall policy and/or specific commands to execute on the target system. The main application of this program is to protect services such as SSH with an additional layer of security in order to make the exploitation of vulnerabilities much more difficult. The authorization server works by passively monitoring authorization packets via libpcap. Also supported is a robust port knocking implementation based around iptables log messages.
Perl Advanced TCP Hijacking is a collection of tools for inspecting and hijacking network connections written in Perl. It consists of a packet generator, an RST daemon, a sniffer, an ICMP redirection tool, an ARP redirection tool, an IDS testing tool, and an automatic hijacking daemon for plain protocols, and features both GUI and terminal interfaces.
Lokiwall is a firewall script for Linux. In addition to the standard function of easily limiting network traffic, it features dual routing (using two Internet connections simultaniously), connection fail-over, load balancing, traffic control, advanced masquerading, advanced DNAT, and advanced marking (to direct specific traffic to a certain interface). The advanced features require some kernel patches. The standard features will work on a default Linux system with iptables and iproute2.
mSuite is a solution for enterprise-wide infrastructure management. This solution uses Monolith Event Manager (Event/Fault), Action Manager (E&N), and Reporter (Historical Reporting). Monolith integrates with a variety of availability and performance tools based upon a client's needs. mSuite can monitor syslogs, SNMP traps, and NT event logs.
SpotSec Network Gateway is an all in one Linux firewall and gateway distribution that features a Web-based management console. It is designed to be a unified threat management system to protect and defend a network. Common features include intrusion detection and prevention and HTTP, SMTP, and POP3 proxies with content filtering and virus scanning. The design of the Web interface is centered around the definition of networks, services, users, and time events, which allows easier modification of packet filter rules.
Swan is a bandwidth manager and Internet gateway that effectively controls and manages the collective bandwidth of an organization. As an Internet gateway it includes a transparent proxy, caching engine, access control lists, caching DNS server, logging and monitoring tools, an authentication mechanism, bandwidth clubbing, and policy management. It is ideal for ISPs, corporations, schools, colleges, etc. Both GUI and console-based interfaces are available for controlling the software. Installation is through a bootable CD that automatically formats the system.
fwsnort translates snort rules into an equivalent iptables ruleset. By making use of the iptables string match module, fwsnort can detect application layer signatures which exist in many snort rules. fwsnort adds a --hex-string option to iptables, which allows snort rules that contain hex characters to be input directly into iptables rulesets without modification. In addition, fwsnort makes use of the IPTables::Parse Perl module in order to (optionally) restrict the snort rule translation to only those rules that specify traffic that could potentially be allowed through an existing iptables policy.