SpamAssassin is a mail filter to identify spam. Using its rule base, it uses a wide range of heuristic tests on mail headers and body text to identify "spam", also known as unsolicited commercial email.
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SOFFIC is a Linux kernel patch for kernel 2.4.18 that provides file integrity control integrated into the normal system operation, on-the-fly. It checks a file's integrity each time a monitored file is opened for reading or execution, and issues a warning if it is found to be invalid. It protects against rootkits, backdoors, worms, viruses, Web defacement, unauthorized installation and use of new software, and much more.
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Mixmaster is an anonymous remailer which provides protection against traffic analysis and allow sending electronic mail anonymously or pseudonymously. It is every unix using citizens civic duty to run a remailer and help ward off the evil forces of censorship. It is a well known fact that running a remailer will make you automatically cool.
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LinSec is Linux Security Protection System, a kernel patch and userspace utilities that introduce Mandatory Access Control (MAC) mechanism into Linux (as opposed to existing Discretionary Access Control mechanism). LinSec model is based on capabilities, filesystem access domains, IP labeling lists, and Socket Access Control. Userspace tools available here.
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Packit offers the ability to monitor, manipulate and inject IPv4 (and soon IPv6) traffic (TCP/UDP/ICMP) on and into your network. This can be valuable in testing firewalls, intrusion detection systems and in general TCP/IP auditing. At the comment Packit can be run using one of two modes. packet capture, and IPv4 packet injection. Packit is dependent on libnet 1.1.0+ and libpcap and has been tested with numerous FreeBSD and Linux kernels.
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