Free network equipment software for linux

Network Pipemeter is a tool for measuring available bandwidth between hosts. nepim is also useful to generate network traffic for testing purposes.
nepim operates in client/server mode, is able to handle multiple parallel traffic streams, reports periodic partial statistics along the testing, and supports IPv6.
nepim has been tested under Linux, Solaris and FreeBSD, though it should work under other platforms as well. If you manage to build nepim for different systems, please send the patch.
- nepim is useful to assess the throughput at the transport layer (TCP or UDP) as seen by applications.
- nepim runs single-threaded and should impose very light burden on your CPU. Unless, of course, your testing hosts have relatively high network bandwidth compared to low CPU power.
- One single server can service multiple clients simultaneously.
- As of nepim 0.11, one single client can interact simultaneously with multiple servers. For instance, suppose you want to test, from a single client, two remote servers, one located at 10.0.0.1,2000 and another at 192.168.0.1,3000:
- nepim -c 10.0.0.1,2000/192.168.0.1,3000
- The server listens to both TCP and UDP sockets. The client by default uses TCP sockets. Use the "-u" client option to switch the client operation to UDP.
- By default, only the server sends traffic towards the client. Use the "-s" client option to reverse the behavior, then only the client will send traffic. Use the "-d" client option to make both client and server to send traffic.
- Use the "-r" client option to establish an upper bit rate limit. Without a rate limiting option, nepim sends as fast as possible. See also "-R" below. Please notice the rate is specified in bps (bits per seconds); for instance, the following example states a rate limit of 100,000 bps (100 Kbps):
- nepim -c 10.0.0.1 -r 100000
- Use the "-R" client option to establish an upper "packet" rate limit (outbound rate limit for transport layer segments). Without a rate limiting option, nepim sends as fast as possible. If both "-r" and "-R" are given, nepim limits the sending rate at the lower of those bounds.
- Use the "-n" client option to run multiple parallel traffic streams.
- Use the "-b" server option to make the server to listen on specific local addresses.
- Use the "-6" option to disable IPv6 support.
Enhancements:
- Support for randomizing the UDP destination address/port has been added in order to put stress on routers with on-demand (dynamic) forwarding table caches.

Network Probe and protocol analyzer is the ultimate tool for traffic-level network monitoring, troubleshooting, analysis,
If your network is crawling to a standstill, and you suspect there might be a problem with the network traffic, Network Probe will quickly help you identify what is causing the problem, show you who is generating any troublesome traffic, and where the traffic is being transmitted.
Network Probe will collect traffic statistics for all protocols, hosts, and conversations on your network, and show you all the top talkers and listeners on your network. Hosts generating large amounts of traffic such as music and movie streaming, playing online games, or listening to streaming media are easily identified.
Main features:
- Watch in real time which protocols are used on your network
- Watch in real time which hosts are active on your network and the Internet
- Watch in real time which conversations are taking place on your network and to and from the Internet
- Watch in real time detailed protocol statistics per host
- Watch in real time detailed protocol statistics per conversation
- Watch in real time network card details for your network
- Watch traffic amount of selected entries relative to the total and filtered traffic
- Watch traffic amount over time for any host, conversation, and protocol
- Watch in real time network throughput for the entire network segment
- Inspect detailed logged statistical data from days and weeks earlier
- Filter out and search for selected protocols, hosts, conversations, and network cards
- Sort network traffic by amount of data transmitted or received
- Export network traffic statistics data
- Configure users with restricted access to statistical data
- Password protected login

Manage your network with a free Network Monitoring Software application.
Network Management Tool is an organized way to manage your network. 100% web-based network management.
Manage your network devices with ease. 100% Free Network Managment Software! Manage all your network devices, routers, switches, firewalls, hubs, and more.
Enhancements:
- A display bug that occurred when viewing the comments on a device was fixed.

Network Management Center project is a comprehensive network device management tool. After entering each network device, every detail can be tracked and monitored.
Having this information accessible simplifies the process of troubleshooting a network.
Manage your network with a free web-based network management tool. Troubleshooting your network will become much easier with all your network information just a few clicks away.
Add all your network devices and monitor the details about each device, and any changes that are made to the network device. Multi permission levels allow complete control over the system.
Keep your network organized and under control, network management software is based on PHP and MySQL.
Enhancements:
- Some bugs found in the forms library for the network management center software 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.

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 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 Tracker and Management is a Web-based network management application.
Network Tracker and Management can store information about all of your network devices, and allows you to track all changes and updates made to the device.
Having this information readily available will enhance your ability to troubleshoot network problems.
Enhancements:
- The documentation was updated to include more details on the setup of the database for the network tracking system.