Free connections software for linux

Passive Cache is a Firefox extension that retrieves a stripped version of the cached Google page for a URL, as well as a listing of Waybacks archived pages for the URL. In essence, it allows the viewing of a page, or site, without any active connections being made to the site.

MySQL Abstractor package contains PHP classes that implements a MySQL database abstraction layer.

It provides several classes. There is one for establishing connections and executing SQL queries, another for composing and executing SELECT, INSERT, UPDATE and DELETE queries from a list of parameters, and a wrapper class to simplify the usage of the other two classes.

HA-Proxy is a TCP/HTTP reverse proxy which is particularly suited for high
availability environments. Indeed, it can :
- route HTTP requests depending on statically assigned cookies ;
- spread the load among several servers while assuring server persistence through the use of HTTP cookies ;
- switch to backup servers in the event a main one fails ;
- accept connections to special ports dedicated to service monitoring ;
- stop accepting connections without breaking existing ones ;
- add/modify/delete HTTP headers both ways ;
- block requests matching a particular pattern ;
It needs very little resource. HAproxy it is event-driven architecture allows it to easily
handle thousands of simultaneous connections on hundreds of instances without risking the systems stability.
Start parameters
There are only a few command line options :
-f < configuration file >
-n < high limit for the total number of simultaneous connections >
-N < high limit for the per-proxy number of simultaneous connections >
-d starts in foregreound with debugging mode enabled
-D starts in daemon mode
-q disable messages on output
-V displays messages on output even when -q or quiet are specified.
-c only checks config file and exits with code 0 if no error was found, or exits with code 1 if a syntax error was found.
-p < pidfile > asks the process to write down each of its childrens pids to this file in daemon mode.
-s shows statistics (only if compiled in)
-l shows even more statistics (implies -s)
The maximal number of connections per proxy is used as the default parameter for each instance for which the maxconn paramter is not set in the listen section.
The maximal number of total connections limits the number of connections used by the whole process if the maxconn parameter is not set in the global section.
The debugging mode has the same effect as the debug option in the global section. When the proxy runs in this mode, it dumps every connections, disconnections, timestamps, and HTTP headers to stdout. This should NEVER be used in an init script since it will prevent the system from starting up.
Statistics are only available if compiled in with the STATTIME option. Its only used during code optimization phases.
Enhancements:
- Content switching is now fully operational using ACLs.
- ACLs can look for matches in path and headers in addition to previously supported criteria.
- Integer comparison is now supported for header values. 15 pre-defined ACLs are provided.
- Error pages can be customized using external files.
- Several bugs have been fixed.
- This version will be maintained as a stable one during further development.

pynetfilter_conntrack is a Python binding of libnetfilter_conntrack. The binding is the file pynetfilter_conntrack.py and you have also a clone of conntrack program: conntrack.py.
Conntrack.py
Conntrack.py is a clone of conntrack C program. Features:
- list: List connections ;
- xml: Export connections to XML document ;
- delete: Delete connection.
For all commands, you can filter connections with:
- source/destination address from original/reply destination ;
- layer 3 and 4 protocols ;
- source/destination port from original/reply destination (for protocols tcp, udp and sctp).
Enhancements:
- Compliance with pickle, minor enhancements to the API, and a debian/ subdirectory for Debian and Ubuntu packaging. setup.py no longer uses setuptools by default.

Lokiwall provides an easily manageable Linux firewall with some unique features.
Lokiwall is a firewall script for Linux. In addition to the standard function of easily limiting network traffic, it features dual routing (using two Internet connections simultaniously), connection fail-over, load balancing, traffic control, advanced masquerading, advanced DNAT, and advanced marking (to direct specific traffic to a certain interface).
The advanced features require some kernel patches. The standard features will work on a default Linux system with iptables and iproute2.
In addition to the standard features every firewall should have, this firewall has the following extras:
- Dual routing (Dual Routing gives you the ability to use two internet connections simultaniously)
- Fail Over (When one of two internet connections goes down, the other takes over the full load)
- Load Balancing (When using two internetconnections the slower one will get less traffic)
- Traffic Control (Traffic control is not yet functional in version 0.1)

Gratissip Tftp is a program that displays TCP/IP connections on an LCD display.
ratissip Tftpd is a TFTP server written in Java. It has special extensions which allows it to serve firmware and provisional settings for Grandstream VoIP phones.
Enhancements:
- The code was fixed up for announcement.

Net::Proxy is a Perl framework for proxying network connections in many ways.

SYNOPSIS

use Net::Proxy;

# proxy connections from localhost:6789 to remotehost:9876
# using standard TCP connections
my $proxy = Net::Proxy->new(
{ in => { type => tcp, port => 6789 },
out => { type => tcp, host => remotehost, port => 9876 },
}
);

# register the proxy object
$proxy->register();

# and you can setup multiple proxies

# and now proxy connections indefinitely
Net::Proxy->mainloop();

A Net::Proxy object represents a proxy that accepts connections and then relays the data transfered between the source and the destination.

The goal of this module is to abstract the different methods used to connect from the proxy to the destination.
A proxy is a program that transfer data across a network boundary between a client and a server. Net::Proxy introduces the concept of "connectors" (implemented as Net::Proxy::Connector subclasses), which abstract the server part (connected to the client) and the client part (connected to the server) of the proxy.

This architecture makes it easy to implement specific techniques to cross a given network boundary, possibly by using a proxy on one side of the network fence, and a reverse-proxy on the other side of the fence.