Free Linux Tools

DSM (Dedicated Server Manager) Standard is a solution for hosting companies and organizations who need to combine a Web server, mail server, DNS server, or a fully featured Web hosting environment.

Silk Tree is a tool that propagates /etc/passwd and /etc/group files from a master to a list of hosts via SSH. The sending and receiving ends connect to each other as a non-root user. A read-only sudo program on the receiver’s side makes the final modifications in /etc.Many checks are made to ensure reliable authorization [...]

Spyrius is an extensible multithreaded superdaemon. Spyrius is essentially a TCP server that manages loadable modules (“plug-ins”).
Each module represents a network service that can be loaded into or unloaded from the daemon on-the-fly. Worker threads are spawned to handle incoming client connections.
A client can communicate with several modules in the course of one session with [...]

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, [...]

SSLScan is a fast SSL service scanner. It determines which ciphers are supported, the preferred ciphers, and the service certificate. The project is also possible to supply a certificate and private key to use with a connection.
Requirements:
· OpenSSL
· GNU C compiler
Build:
sslscan can be built manually using the following command:
gcc -lssl -o sslscan sslscan.c
The command line [...]

Netmaster is a client/server program which allows the controlling of a network device over a LAN. It was designed to allow users to easily bring a ppp device up/down, but it could be easily modified to do other simple tasks.
What’s New in This Release:
· Various bugfixes
· Now allows socket to be reused
Sources mirror 1 (tar.gz)

vnStat is a console-base network traffic monitor that keeps a log of daily and monthly network traffic for the selected interface. vnStat isn’t a packet sniffer. The traffic information is analyzed from the /proc -filesystem, so vnStat can be used without root permissions. However at least a 2.2.x kernel is required.
This program is open source/GPL’ed [...]

Nmap is a utility for network exploration or security auditing. It supports ping scanning (determine which hosts are up), many port scanning techniques (determine what services the hosts are offering), version detection (determine what application/service is runing on a port), and TCP/IP fingerprinting (remote host OS or device identification).
Nmap project also offers flexible target and [...]

Another aspect of enumeration of hosts is the determining of TCP ports in an OPEN state, that is to say TCP ports which respond to SYN packets with a Syn and the ACK flag set, Syn-Ack.
Synscan is impressively fast at determinining this via the use of two processes, one to send the Syn packets and [...]

Bandwidth Management Tools is a total bandwidth management solution for Linux and can be used for firewalling, traffic graphing, and shaping.
Bandwidth Management Tools is not based on any currently-available bandwidth management software and supports packet queues, bursting, complex traffic flow hierarchies, flow groups, traffic logging, and a simple real-time monitoring front-end.
Here are some key features [...]