Free connexions software for linux

conn-close gives us possibility to get rid of entries in ip_conntrack about ESTABLISHED TCP connections that goes through our server.

conn-close script uses hping2 to send spoofed RST packets which will fool conntrack and cause specified connections to be considered by conntrack as closed (now these connections will be in ip_conntrack in CLOSE state), even though RST packets will be more likely discarded by destination host.

Information about connections is read of course from /proc/net/ip_conntrack.

Idea was taken from script seen somewhere on the internet.

Connection Manager allows you to pre-configure all this, and use a single consistant interface to get connected to all of these various systems.
Do you have to log in to a lot of different systems? If you do, odds are that you have to use a variety of methods. You probably have some systems that require ssh and others that only support rdesktop. For some you may have to use vnc. Some may only support telnet. Connection Manager allows you to pre-configure all this, and use a single consistant interface to get connected to all of these various systems.
To install from the source distibution type (you probably will have to be root):
make install
To make rpms for rpm-based ditros type:
make rpm
Main features:
- Command Line Interface - Connection Manager will have a command line interface that allows for easy initiation of any connection. Some users, especially system administrators, will prefer this method of interaction
- Qt/KDE interface - Connection Manager will have a full featured graphical interface based on the Qt and KDE widgets. This interface will allow a user to manage their own connections, as well as maintain all of the various configuration files. You shouldnt have to use a text editor to edit configuration files unless you really want to
- Documentation - Connection Manager will be completely documented, including man pages, a user reference guide, and an administrator reference guide.
- Packaging - every effort will be made to make Connection Manager easy to install. Packages will be provided for a variety of platforms.
- Internationalization - Connection Manager will be designed and built so that it will be easy to add support for different languages.

QoS Connection Tuning HOWTO is a document which explains how to tune network connection performance.

This enables you to get the maximum benefit out of your connection without lag and loss.

JACK is a low-latency audio server, written for POSIX conformant operating systems such as GNU/Linux and Apples OS X.

Jack audio connection kit can connect a number of different applications to an audio device, as well as allowing them to share audio between themselves. Its clients can run in their own processes (ie. as normal applications), or can they can run within the JACK server (ie. as a "plugin").

JACK was designed from the ground up for professional audio work, and its design focuses on two key areas: synchronous execution of all clients, and low latency operation.

JSecureTunneling provides a Java SSH client for tunnels management.

SecureTunneling is a Java SSH client that is entirely oriented toward the management of SSH tunnels, offering the ability to establish secure and permanent tunnels to a remote SSH server transparently, just like a simple network connection.

The key features are: auto-reconnection, connection monitoring, connection triggers, tunneling changes on-the-fly, and profile management.

tcptunnel is a simple TCP tunnel written in Perl.

Also is a versatile tcp tunnel. The tcptunnel uses:
- tunnelling through a firewall or proxy
- redirecting tcp connections to other ports or machines
- debugging tcp connections in-place
- packet sniffing

The tcptunnel listens on local port < port > and when a connection is made it connects the other end of the tunnel as follows:
a) With no proxy specified, it connects the other end
to < srvport > on < srv >.
b) With a proxy, it connects to < srvport > on < proxy >.
It then directs the proxy to telnet to < srv >, and then it connects the ends of the tunnel.

online.php analyses /var/log/ppp-usage and displays connection statistics. It also prints some information about your current PPP connection.
Well, I was inspired by the script Onlinecalc by Michael Schlenstedt (Michael@adsl4linux.de). His script is heavily based upon "calc" by Ulrich Schmitz.
Since Onlinecalc did not fit my needs, I did a complete rewrite in php.
Main features:
- reads /var/log/ppp-usage and prints a table with a row for each month.
- also calculates the values of the current connection.
- completely written in PHP.
- display connect-time as dd:hh:mm:ss
- display volumes as 123 456 789,12 MB
- displays chronologically (maybe I will change the sorting later to reverse)