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From the tcpcat README: Tcpcat is a simple program that is like `cat' but it works over TCP streams to allow you to cat from one host to another. The host common way to use this program whould be something like this: on host a: $ tcpcat -l 93255 | gzip -dc | tar xvf - on host b: $ tcpcat -h hosta:93255 file.tar.gz Another good use for this program is debugging network stuff. When debugging a newtork client or server you can pipe the output of tcpcat to a hex dump (I recomend xxd which comes with vim). Also it can act as a crude telnet server when invoded with --listen, --input, and --output, this mode is quite useful for network program debugging as well.

This is a port of librdkafka, a C library implementation of the Apache Kafka protocol, containing both Producer and Consumer support. It was designed with message delivery reliability and high performance in mind, current figures exceed 800000 msgs/second for the producer and 3 million msgs/second for the consumer.

tcpmssd was written by Ruslan Ermilov <ru@FreeBSD.org> based on work done by Patrick Bihan-Faou <patrick@mindstep.com>. tcpmssd is a divert(4) program that adjusts outgoing TCP data so that the requested segment size is not greater than the amount allowed by the interface MTU. This is necessary in many setups to avoid problems caused by routers that drop ICMP Datagram Too Big messages. Without these messages, the originating machine sends data, it passes the rogue router then hits a machine that has an MTU that is not big enough for the data. Because the IP Don't Fragment option is set, this machine sends an ICMP Datagram Too Big message back to the originator and drops the packet. The rogue router drops the ICMP message and the originator never gets to discover that it must reduce the fragment size or drop the IP Don't Fragment option from its outgoing data.

tcpshow reads a tcpdump(1) savefile and provides a reasonably complete decode of Ethernet, IP, ICMP, UDP and TCP headers. Boolean expressions may also be specified for packet selection. Data within the packets are displayed in ASCII. tcpshow's output is simular to Sun Solaris's snoop(1M) command for network packet capture and inspection.

The tcpsplit utility breaks a single libpcap packet trace into some number of sub-traces, breaking the trace along TCP connection boundaries so that a TCP connection doesn't end up split across two sub-traces. This is useful for making large trace files tractable for in-depth analysis and for subsetting a trace for developing analysis on only part of a trace.

tcptrace is a TCP connection analysis tool. It can tell you detailed information about TCP connections by sifting through dump files. The dump file formats supported are: Standard tcpdump format (you need the pcap library) Sun's snoop format Macintosh Etherpeek format HP/NetMetrix protocol analysis format NS simulator output format NetScout NLANR Tsh Format To see the graphs, you'll also need Tim Shepard's xplot program, available at http://www.xplot.org

An alternative to nss_ldap using an ldap based NIS/YP server. This is a UNIX daemon providing NIS services with a modular backend interface. The current focus is the development of an LDAP module for the backend data source. This daemon was (and is being written) in order to migrate a large install base of UNIX systems utilizing NIS to an LDAP based solution, eventually facilitating a migration of all corporate services that rely on similar data to LDAP. This (and future) LDAP related tools are being released under the BSD License (with advertising clause).

TCPWatch is a utility written in Python that lets you monitor forwarded TCP connections or HTTP proxy connections. It displays the sessions in a window with a history of past connections. It is useful for developing and debugging protocol implementations and web services.

tdetect detects someone running traceroute against your system. It does this by detecting UDP (Unix traceroute) or ICMP ECHO (Windows traceroute) packets with TTL fields == 1.

Enhanced version of VNC, called TightVNC (grown from the VNC Tight Encoder project), which is optimized to work over slow network connections such as low-speed modem links. While original VNC may be very slow when your connection is not fast enough, with TightVNC you can work remotely almost in real time in most environments. Besides bandwidth optimizations,TightVNC also includes many other improvements, optimizations and bugfixes over VNC. Note that TightVNC is free, cross-platform and compatible with the standard VNC.