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Ptcap is a Unix daemon that captures traffic packet size, source, destination, and times and saves this data into a postgres (and now ODBC including mysql) database in near real time, from which traffic reports may be made.
GTCop Professional Security Appliance aims to provide a powerful tool for satellite communications, with enhanced QoS and bandwidth controls. As derived from IPCop Firewall, it is a stable, secure, easy to configure and maintain GNU/Linux firewall box.
Snort_inline is a modified version of Snort. It accepts packets from iptables, instead of libpcap. It uses new rule types to tell iptables if the packet should be dropped or allowed to pass based on the Snort rules.
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Amber - a "grey list" for Qmail. Amber sits in the tcpserver chain, not accepting or rejecting mail but deferring connections from new IP addresses for some time (default five minutes) before it starts accepting mail from them.
kclamav is a lite and streaming version of the ClamAV virus scanner.
It is built as a Linux 2.6 kernel module and hooks via the Netfilter API.
The ClamAV virus database is loaded into kernel memory.
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Cluster-Manager Daemon that uses Netfilter clusterip to make active-active clusterip. Keep-alive notify messages are sent periodically to every clusternode. clusterip is configured automatically when there are changes in the cluster.
Authdefender is a filtering application that, in combination with iptables, blocks malicious users from accessing any aspect of the server in question. Malicious users are defined by brute force ssh/ftp attempts and blocked regardless of tcp wrappers.
DAXFi is a Python package that helps configure several different kinds of firewalls in a consistent way. The rules are described in XML. It comes with a Python package, useful to build other applications and includes some useful example programs.
Allows use of the same port for both a SSH server and SSL (https) server, without needing changes to clients. Incoming connections will be proxied to a SSH or SSL server depending on the protocol spoken by the client. Handy if your home box runs a secure
This is a daemon that emulates Microsoft's Internet Connection Service (ICS). It implements the UPnP Internet Gateway Device specification (IGD) and allows UPnP aware clients, such as MSN Messenger to work properly from behind a Linux NAT firewall.
A fast PPTP proxy for any BSD with OpenBSD packet filter installed. It handles multiple transparent bi-directional tunnels, and can be chained from one proxy to another over several servers.
A daemon to detect spammers trying to harvest email addresses by username guessing and temporarily DROP them with iptables firewall rules. The program also looks for and kills sendmail processes that have been stuck in "cmd read" mode for a long time.
A Port Knocking C-based server & client. Stealth mode by closed ports, strong encryption (ARC4 & BlowFish), Daemon mode, compresed sequence, MD5 digest log check, user passwords and user privelege system, action triggers... GPL license.
Gardol monitors system log files to detect denial of service and other attacks and blocks attacking sites with Linux iptables. Attack detection rules may be programmed in Perl.
GNOME Blocklist is a GNOME interface and backend for Linux P2P blocklist software like moblock and peerguardian. It provides a preference panel, notification icon and dbus daemon.
A web based, user oriented, easy use linux router box, support basic nat, user authentication, port management, traffic control, connnection limit, and proxy selection.
utnld is a daemon that tunnels connections with support for http connect proxies. It is written primarily for accessing e-mail from behind a firewall (as most of the clients don't support proxies).