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fsh uses lsh or ssh to establish a secure tunnel to the remote system. This takes as long as a normal connection establishment, but once the tunnel is established, fsh can reuse it to start new sessions on the remote system almost instantaneously. You get the security of ssh and the speed of rsh.
squidGuard is a combined filter, redirector and access controller plugin for Squid.
NOCOL (Network Operation Center On-Line) is a network monitoring package that runs on Unix platforms. It can monitor various network variables such as ICMP or RPC reachability, nameservers, ethernet load, port reachability, host performance, SNMP traps, modem line usage, appletalk & novell routes and services, BGP peers, etc. The software is extensible and new monitors can be added easily.
The modular syslog allows for an easy implementation of input and output modules. The modules that mantain compatibility with its precursor are included in the standard distribution along with four modules: om_peo (an implementation of PEO-1 and L-PEO, two algorithmic protocols for integrity checking), om_mysql and om_pgsql (modules that sends output to a mysql and postgresql database, respectively) and om_regex (a module that allows output redirection using regular expressions).
The Tacacs+ daemon from Cisco Systems is used in conjunction with Cisco routers for authorization, authentication, and accounting services.
Multi threaded cgi scanner. It has rulesets and more than 2500 cgi script checks.
This program implements: a) A PPTP challenge/response sniffer. These c/r can be input into L0phtcrack to obtain the password, and b) An active attack on PPTP logons via the MS-CHAP vulnerability to obtain the users password hashes. Notice that this also generates the password hashes of the new password the user wanted to use. These can be input into L0phtcrack to get password, into a modified smbclient to logon onto a SMB sever, or into a modified PPP client for use with the Linux PPTP client.
Libnet is an API to help with the construction and handling of network packets. It provides a portable framework for low-level network packet writing and handling (use libnet in conjunction with libpcap and you can write some really cool stuff). Libnet includes packet creation at the IP layer and at the link layer as well as a host of supplementary and complementary functionality. Still in it's infancy however, the library is evolving quite a bit. It is mainly useful for quick and simple packet assembly and related applications (Traceroute and ping were easily rewritten using libnet). See the manpage and sample test code for more detailed information.
The tcp_wrapper package by Wietse Venema. Formerly called log_tcp. Allows monitoring and control over who connects to a hosts TFTP, EXEC, FTP, RSH, TELNET, RLOGIN, FINGER, and SYSTAT ports. Also includes a library so that other programs can be controlled and monitored in the same fashion.
This is a handy little library which provides a packet filtering mechanism based on the BSD packet filter (BPF). Most notably, tcpdump needs this to work, and there is also a perl module (still in beta) which can use this as well. In plain english, if you want to write your own network traffic analyzer, this is the place to start.
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