Free network solutions software for linux

Network FIFO project is a network object that provides data transfering tunnel across network in first in/first out manner.

Simply put,

fifo server file is: monotech_fifo.pl
This script require Net::Server::NonBlocking at least 4.1(you can grab from CPAN)

% perl monotech_fifo.pl < address > < port >

and itll show up like this:

[root@WongWai monotech_fifo]# perl monotech_fifo.pl 192.168.3.52 12000
Listen on 192.168.3.52:20005
Listen on 192.168.3.52:12000

12000 is the port in which the fifo resides.
20005 is the port in which backoffice management resides.

--------------------------------------------------

port 20005 in which the management control resides can be accessed by "admin.pl"

% perl admin.pl < address >

for example

perl admin.pl 192.168.3.52

itll show something like this:

message>

where you can type some commands and press enter

the commands are:

message>readers
message>flush

(flush is the command that read all socket buffer of the admin client socket)

to show all reader in the fifo, it is very useful when some reader is connection disconnected by his ISP or readers machine hangs, the fifo will hold his connection forever (It is because the monotech_fifo.pl doesnt set SO_KEEPALIVE and TCP_KEEPALIVE which will be fixed in the future)

and

message>kill_reader[tab]< fifo name >

to kill any connection of < fifo name >

This package is heavily used by my company, so it is likely reliable.

Network Simulator (Ns) is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless (local and satellite) networks.
Ns began as a variant of the REAL network simulator in 1989 and has evolved substantially over the past few years. In 1995 ns development was supported by DARPA through the VINT project at LBL, Xerox PARC, UCB, and USC/ISI.
Currently ns development is support through DARPA with SAMAN and through NSF with CONSER, both in collaboration with other researchers including ACIRI. Ns has always included substantal contributions from other researchers, including wireless code from the UCB Daedelus and CMU Monarch projects and Sun Microsystems.
Enhancements:
- Major updates were made to the PackMime-HTTP HTTP/1.1 and WPAN modules.
- Solaris/Sun C compilation bugs were fixed.

Network Ustadi is a Web interface for managing network services. It provides firewall management, routing table management, NAT configuration, DHCP server configuration, interface configuration, etc.
To ease the task of network administration, decrease the likelihood of erronous command execution and to maintain all network services from a central point, EnderUNIX SDT anounces the availability of its 9th open-source tool, netUstad.
The tool, designed and coded by one of our developers Ozkan KIRIK, has the capability to generate FreeBSD IPFW and Linux Iptables rulesets. It has been written in C language and includes its own HTTP server.
The newly anounced version provides a web interface for system administrators to add/delete/update IPFW and Iptables rulesets, manage routing table and network interfaces. You can manage your firewall via a TCP/IP connected remote PC, easily.
Enhancements:
- Problems that causes the process to terminate, solved.
- Virtual Server configuration problem fixed.
- Some fixes in nat management module.

Netleak is a collection of small perlscripts that detects connectivity between network segments. It is mostly useful to detect "leaks" in large organizations that have private networks physically separated from the Internet.


Imagine some large corporation which has an internal development LAN were all sorts of sensitive information is flowing around. This corporation would likely have some very strict rules as to how its employees access the internet or other partner branches in order to
protect its information. For the systemadinistrator this is a daunting task - as the corporate LAN grows keeping track of all the routes through the network becomes extremely difficult. Some routers might simply have been forgotten over time or an employee might have gone wise and connected his own adsl-router or something alike.

Network Leak Finder tries to detect this in a centralized manner by sending out spoofed packets into the internal network and if any packets finds a way onto the external network, a "leak" has been detected. As an anology it works the same way you would find a hole in
a bucket: fill it with water and see if anything leaks.

In most scenarios the external network would be the Internet since everybody should be afraid of what their corporate LANs are leaking to it!

My Network Catalog is an indexing engine that allows Windows shares (or Samba shares) to be bound together over a local network.

My Network Catalog allows an easy centralized search of all the files available over the network.

Java Network Stack provides a Java library for research oriented network programming.

Java Network Stack is a library used by the DIMES project to create new internet measurements. It provides a clean API for packet manipulation, send, receive, filter, and analysis. It is a unification of raw socket capabilities, MAC level networkingm, and IPv6 capabilities.

Network Communicator is a simple script for sending and receiving data over TCP/UDP connections.
It can be useful for testing firewall configurations, routing tables, and similar things.
I had originally written two scripts for testing TCP only: a talker and a listener. Upon failure to properly modify them to support UDP only, I made Netcom. It allows the sending and receiving of TCP or UDP data to arbitrary IPs/Ports and optional from/to files.
Im sure there are already tools like this out there like netcat, but wasnt able to get netcat working properly for UDP also. Either way, here you go and enjoy!
Launch Netcom with no options to view the usage.
Enhancements:
- A complete re-write to support arbitrary source/destination and port forwarding (not tunneling).

Network Security Toolkit is a bootable ISO live CD and its based on Fedora Core 2.
The toolkit was designed to provide easy access to best-of-breed Open Source Network Security Applications and should run on most x86 platforms.
The main intent of developing this toolkit was to provide the network security administrator with a comprehensive set of Open Source Network Security Tools. The majority of tools published in the article: Top 75 Security Tools by insecure.org are available in the toolkit.
What we find rather fascinating with NST is that we can transform most x86 systems (Pentium II and above) into a system designed for network traffic analysis, intrusion detection, network packet generation, wireless network monitoring, a virtual system service server, or a sophisticated network/host scanner.
This can all be done without disturbing or modifying any underlying sub-system disk. NST can be up and running on a typical x86 notebook in less than a minute by just rebooting with the NST ISO CD. The notebooks hard disk will not be altered in any way.
NST also makes an excellent tool to help one with all sorts of crash recovery troubleshooting scenarios and situations.
Enhancements:
- We are pleased to announce the latest NST release: v1.5.0. This release is based on Fedora Core 5 using the Linux kernel 2.6.18. Here are some of the highlights for this release: the NST Web User Interface (WUI), has been greatly enhanced and cleaned up; extensive additions to managing and analyzing network packet captures; the ability to setup and manage printers; the ability to easily mount many different supported file system types; the ability to manage the NST as a file server (both NFS and CIFS); the addition of the Inprotect package (a Nessus manager); the addition of the Zabbix package (another network resource monitoring tool - similar to Nagios)....