Free proxy server software for linux

The Zaval Proxy Suite is an easy-to-use solution that allows monitoring TCP-based protocols, such as HTTP, NNTP and others. It is extremely useful in software development and can be used as a debug tool. Another area of appliance is multiple connections logging with proxy facilities. As soon as its a pure java solution it can be used almost everywhere.

The Zaval Proxy functions as a proxy and transfers data between the server and the client writing incoming and outgoing traffic into log files. So you can see these raw data as is.

On start the Zaval Proxy Suite goes through configuration file and creates the specified number of proxy servers and the shutdown server.

"Proxy server" is a server socket listening on the specified port. When the client is connected proxy connects to the target server and transfers data between them logging entire traffic. On each connection 2 files are created - xxx-input (request data from the client) and xxx-output (response data from the server). The "xxx" means here the sequential number of the connection for the proxy server. The traffic is logged into the separate directory for each proxy.

Shutdown server is needed to close all open connections correctly and close the program.

So, in the particular case you should specify address of proxy server in client application (web browser, for example) and address of the target server in the proxy configuration file. You can create any number of proxy servers that run at the same time, however, they should use different port numbers.

Anon Proxy Server is a fast http, https, socks caching proxy server. Easy web based configuration, optional p2p anonymous mode.
Main features:
- Easy Configuration - Web based, no editing text configuration files.
- Memory - No big databases are kept in memory, no matter how large the cache is, memory usage will only increase when more users access it at the same time.
- Speed - To see how much cpu the proxy uses, run top or task manager. Then open multiple windows and hit reload continously, on my computer I usually run out of bandwidth before it goes near 3-5% cpu usage.
- Shared Cache - Can be used as a general cache for all users of a computer/network instead of one cache per profile.
- Automatic config - Auto generates the .pac file for automatic proxy settings, no more updating in the do not use proxy section of individual users browsers.
- Anonymous P2P proxy - Joining the anonymous proxy network will allow you to use other peoples proxys for browsing and allow them to use yours.
- SOCKS - Supports enough of SOCKS to run ftp, most Instant messengers, irc, limewire, etc.
- User authentication - Supports external user authentication.
Enhancements:
- The program now checks for errors in access configuration.
- Variable timeout values were added.
- Log rotation was fixed.
- Occasional crashes on a bad URL were fixed.
- The auto configuration .pac file was fixed, so it should work even if the proxys URL was not set properly.
- Anon proxy defaults to 3 keys now for more reliability.

Proxy Detector is a PHP class that can detect HTTP requests via proxy. This class can detect if a visitor uses a proxy server by scanning the headers returned by the user client.
When the user uses a proxy server, most of the proxy servers alter the header. The header is returned to PHP in the array $_SERVER.
Enhancements:
- This is the first release of the class and implementation example.

SSL Proxy server listens on a TCP port, accepts SSL connections, and forwards them to another local or remote TCP port.
For example, it is possible to create an HTTPS server if you have an HTTP server and you run an SSL Proxy server on port 443 which forwards the connections to port 80.
SSL Proxys design makes it as secure as possible and still perform well.
Enhancements:
- Improved certificate handling (chained certificates are now supported), more error information on SSL protocol errors during SSL_accept(), -U and -D options (buffer size), and a "powered by" logo.

Net::Server::POP3proxy is a Perl module with POP3 Proxy class for working with virus scanners and anti-spam software.

SYNOPSIS

use Net::Server::POP3proxy;

# Constructors
$popproxy = new Net::Server::POP3proxy(
Action => sub { filterAction ($_[0]); },
Error => sub { die ($_[0]); },
Debug => sub { print STDERR ($_[0]); }
) or die ("Cannot init POP3 proxy server");

while ($popproxy->looper()) {
# noop
}

This module implements a POP3 proxy server to enable you to call user defined actions uppon fetching a mail from the POP3 Server.

The destination server is taken from the username, the client connects to the pop3 proxy in the way remoteuser%remote.host:port.

Multiple clients can connect to the POP proxy at a time.

kproxyswitch is a simple bash script, which makes setting the proxy server easier. The setting applies to Konqueror and all other applications that use the global proxy setting.
If you have to change proxies from time to time - or switch the proxy off and on again.
Youll like the possibilty to bind this script to a keyboard/menu/... shortcut and thus be able to switch the proxy faster than going through the menus of Konqueror or KDE Control Center.
Enhancements:
- Small changes: added two apps (randr, nspluginviewer) to blacklist, made output more verbose.