Netcat is a simple Unix utility which reads and writes data across
network connections using TCP or UDP protocol. It is designed to be a
reliable "back-end" tool that can be used directly or easily driven by
other programs and scripts. At the same time it is a feature-rich
network debugging and exploration tool, since it can create almost any
kind of connection you would need and has several interesting built-in
capabilities.
Netdude is the NETwork DUmp data Displayer and Editor for tcpdump tracefiles.
It is a GUI-based tool that allows you to make detailed changes to packets in
tcpdump tracefiles.
Netmap can be used to make a graphical representation of the surrounding
network. It first uses traceroute to make a list of all routers and their
interconnections, after which it generates a .dot file.
NTLM Authorization Proxy Server (APS) is a proxy software that allows you
to authenticate via an MS Proxy Server using the proprietary NTLM protocol.
Since version 0.9.5 APS has an ability to behave as a standalone proxy server
and authenticate http clients at web servers using NTLM method. It can change
arbitrary values in your client's request header so that those requests will
look like they were created by MS IE.
__ _ __
_ __ ___| /_ ___ ___ _ __(_)_ __ | /_ (portable/multi-platform) lightwei-
| '_ \./ _ \ __/ __)/ __| '__| | '_ \| __) ght TCP socket scripting. Intende-
| | | | ._/ |_(__ \ (__| | | | |_) ) |_ d for (non-)experienced persons to
|_| |_|\___|\__|___/\___|_| |_| .__/ \__) be able to use to automate situati-
[TCP socket scripting program] |_| [1.6.0] ons, built on a word-to-word rules-
et response system. includes wild-
card support, character replacement, random replacement, argument inclusion,
server timeout, initial send, display altering, multiple character dump forma-
ts, telnet protocol support, logging, program to socket dumping, executable
ruleset support, reverse binding, and module support among other things.
NetStrain is a tool to measure practical data throughput between two machines
over a TCP connection. It can be used for performance testing,
stress/stability testing and to demonstrate various network effects. It
supports both IPv4 and IPv6, provided the underlying system does.
ngrep strives to provide most of GNU grep's common features, applying
them to the network layer.
ngrep a pcap-aware tool that will allow you to specify extended
regular expressions to match against data payloads of packets. It
currently recognizes TCP, UDP, and ICMP across Ethernet, PPP, SLIP,
FDDI, Token Ring and null interfaces, and understands BPF filter
logic in the same fashion as more common packet sniffing tools,
like tcpdump and snoop.
The Packet Debugger (pdb) is a program which allows people to work
with packet streams as if they were working with a source code
debugger. Users can list, inspect, modify, and retransmit any packet
from captured files as well as work with live packet capture.
This is a relatively simple port of OpenRADIUS. From the faq...
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What is OpenRADIUS?
OpenRADIUS is a piece of software that links your network access
devices to your user-, service profile-, and usage databases.
As such, OpenRADIUS isn't unique; other servers that speak the
RADIUS protocol do the same. But it is unique in the flexibility
it offers you in building this link, because it puts you in full
control of the business rules used inside the server and the ways
it talks to your databases - without anybody having to hack the
source code.
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Omnitty is a curses-based program that allows one to log into several
machines simultaneously and interact with them, selectively directing
input to individual machines or groups of selected machines.
You can run both line-oriented and screen oriented in the target
machines, because Omnitty has built-in terminal emulation capability.
When the window is large enough, Omnitty also displays a "summary area"
for each machine, in which it shows what the latest output from the
machine was, so you can have an idea of what is going on in each machine.