Free networking software for linux

Network technology evolves quickly, but available bandwidths are still not sufficient for fast transfers of big files to a bunch of clients (for example populating operating systems installation images).

This paper describes Multicasting Master-Slave Network Filesystem (mmsnfs) -- a new method of distributing entire filesystem among several client-machines simultaneously and efficiently.

Moreover it provides mechanisms for modifying distibuted filesystem structure reliably and securing it against introducing inconsistencies. It is designed to be used in small networks of similarly-configured machines, for instance university labs or internet cafes.

NSH is intended to handle configuration for interfaces, bridging, routing, packet filtering, NAT, and ISAKMP. It presents the user with a vaguely cisco-like interface.

It also gives the user access to system information and diagnostics. NSH replaces the userland commands which handle these functions, and talks directly to the OpenBSD kernel (with exceptions for pfctl, isakmpd, and dhcpd).

NSH is completely free, it only incorporates code with BSD-style licenses.

The current version fixes bugs from the last release and brings NSH up to speed for OpenBSD 3.7 and 3.7-current.

For the next major release, Im planning on some IPsec, OSPF, BGP, and DHCP functionality, and possibly ping and other functions. (Also, a rework of the CLI code might happen) The CLI is functional for information/diagnostics, and configuration of pf/nat/altq, interfaces, bridging, and routing.

GNOME Network is a set of client network-oriented tools, which currently contains a network information tool, a remote shell and desktop clients and a personal web server and a desktop sharing tool.
GNOME Network is Free Software distributed under the terms of the GNU GPL.
Enhancements:
Updated translations:
- gl (Ignacio)
- it (Alessio)

Morcego is a 3D graph browser for viewing and navigating any graph-like structure. Examples of such structures include social networks, site maps, hierarchies, and genealogy trees. It currently only support simple graphs.
Morcego 3D network browser already integrated into TikiWiki. Morcego is not meant to provide a solution for the end user, but to be embedded in a Web application by developers. Its a Java applet that communicates with an XML-RPC server to load the graph that is displayed.
Enhancements:
- New configuration vars (check README for meaning):
- frictionConstant, new Float(0.4f));
- elasticConstant, new Float(0.5f));
- punctualElasticConstant, new Float(1f));
- eletrostaticConstant, new Float(1000f));
- springSize, new Float(100));
- nodeMass, new Float(5));
- nodeCharge, new Float(1));
- loadPageOnCenter, new Boolean(true));
These are not used anymore:
- originX
- originY
- originZ
- universeRadius
- maxNodeSpeed
- linkedNodesDistance Changes:
- [ADD] physical model to balance graph
- [ADD] support for description box on mouse over
- [ADD] Morcego and Arca logs, optional
- [ADD] support for different transport layers, only XmlprcTransport available by now [ADD] option to have camera distance relative to nearest node instead of center, default.
- [ADD] option to open target page on every navigation, default
- [MOD] nodes pop always behind center node, to avoid hanging while rendering very big nodes
- [FIX] graph instability in some cases

DNA (Deep Network Analyser) is an open, flexible, and extensible deep network analyzer server and software architecture for passively gathering and analyzing network packets, network sessions, and applications protocols.
Deep Network Analyser project is designed to be used for Internet security, network management, intrustion detection, protocol and network analysis, information gathering, and network monitoring applications.
Main features:
- Extensible Java based network sensor (processing layers 2-7)
Configurable processing and output:
- Packet flows like Ethereal
- IP Flows like CISCO netflow
- Stateful Sessions (client/server flow pairs)
- Application protocol element output
- Configurable and extensible application protocol element parsing.
- Application protocol parsing toolkit APIs allows for new protocol parser to be easily developed and extended
- Targeting based full session capture facility, like a realtime targeted TCPDump.
- Flexible targeting from IPAddr, Port tuple to Application sensitive targeting.
- Configurable and extensible output forwarding (file, DB, Streams, JMS, RMI, etc.)
- Extensible realtime collection portable to many OS/Packet processing environments
Easily adaptable to packet processing environments:
- Specialized linux drivers mechanismon
- Network Appliances
- Network Switches / Routers
- Highly mutithreaded for increased performance over multi processor environments
Enhancements:
- Adoption of OpenAdaptor(tm) as the Output Adapter mechanism.
- Support for local-only administration.
- A new targeted packet capture parser, new run scripts, and a new install mechanism.
- Many bugfixes.

Network Virtual Terminal for Java is a library that can drive a terminal emulator connected to the application through a telnet session.

Usage:

The API consists of the interface nvt4j.Terminal . The implementation of this class is called nvt4j.impl.Terminal. To allow the user to connect to the application you need to listen for a tcp connection and then wrap a Terminal object around it:

ServerSocket serverSocket = new ServerSocket(8000);
Socket socket = serverSocket.accept();
Terminal terminal = new nvt4j.impl.Terminal(socket);

For example, to run the sample class Example.java from an xterm session, you can
do this:

user@localhost$ java -classpath nvt4j.jar Example &
user@localhost$ telnet localhost 8000

NVT4J uses the Telnet LINEMODE option to put the terminal driver (xterm in this case) in what the posix standard calls raw or non-canonical mode, so that it can receive all user inputs asap, instead of waiting for a new-line character.

Unfortunately in pure Java there is no way to put the operating system console in
raw mode. On Linux and similar systems this is done using the stty command, which is a native program which manipulates the terminal driver in the operating system.

Whats New in This Release:

First alpha release. This code is quite limited but it already provides the basic functions needed to drive a terminal emulator for Java, namely putting the terminal driver in raw mode, turning off the cursor and client-side echo, and detecting the size of the terminal emulator window.

This code has been tested only with xterm.

Jimsim Network Simulator project can emulate several routers connected via virutal networks. You can connect to the routers with your own favorite telnet program.
Connecting to the Virtual Routers
Use your favorite telnet program to connect to each of the virtual routers. For example:
For router 1 type:
C:>telnet localhost 10000
For router 2 type:
C:>telnet localhost 10001
For router 3 type:
C:>telnet localhost 10002
Network Layout
Currently the network is configured like this:
access-list [1-99] [permit/deny] [ ip wildcard-mask | host a.b.c.d | any ]
ip acccess-list [standard] [name]
ip access-group
show access-list
show ip interface
show ip interface brief
debug interface
encapsulation [hdlc,ppp] (serial interfaces only)
bandwidth
clock rate (serial interfaces)
interface loopback0
User commands:
?
enable
exit
ping ip
show cdp
show cdp neigh
show cdp neigh detail
show interface
show interface e0,eth0,etc
show ip route
show version
Enable commands:
clear counters
clear counters interface
config terminal
copy running startup
copy startup running
debug all
debug ip routing
debug ip eigrp
debug cdp
disable
exit
reload
show run
show startup
show ip eigrp neighbors
show ip eigrp topology
traceroute ip
undebug all
undebug ip routing
undebug ip eigrp
undebug cdp
Config commands:
cdp run
enable password password
end
hostname
banner motd delimiter
banner exec delimiter
banner login delimiter
ip route network netmask dest
interface e0,eth0,etc
bandwidth value
ip address addr netmask
description
cdp enable
shutdown
line con0, console0, console 0
login
login local
password passwd
router eigrp number
network a.b.c.d
service password-encryption
user username password password
Version restrictions:
- The EIGRP support is very basic. Just the network command for now. (Neighbors dont expire.) You can disable EIGRP with "no router eigrp process_id"
- The routing table isnt 100% correct. It doesnt summarize subnets. Nor does it understand multiple routes to the same destination. This will be fixed in the next version.
- Traceroute seems to count extra hops. Its counting each remote interface on a router as a hop. So, when you traceroute from router1 to router3, it counts router2 twice (once for 192.168.1.2 and 10.1.1.1)