Free ms proxy software for linux

IMAP Proxy server is a caching IMAP proxy server. It was written to compensate for webmail clients that are unable to maintain persistent connections to an IMAP server. Most webmail clients need to log in to an IMAP server for nearly every single transaction.

This behaviour can cause tragic performance problems on the IMAP server. imapproxy tries to deal with this problem by leaving server connections open for a short time after a webmail client logs out.

When the webmail client connects again, imapproxy will determine if theres a cached connection available and reuse it if possible.

How does imapproxy keep track of which server connection is for which user?

Upon the first successful login to the real IMAP server (through the proxy), imapproxy fills in a little record that contains the username, an md5 digital signature of the password and the server socket descriptor thats being used.

After you log out and then log back in again, imapproxy just has to find a record that matches your username and password. These records are stored in a hash table (with the username being the hash key) in memory, so the lookups are pretty fast.

Can IMAP Proxy support multiple backend servers?

If you want IMAP Proxy to be able to proxy to multiple backend IMAP servers, you can run multiple instances of IMAP Proxy and make sure each instance is looking at a different configuration file.

Before you do this, take a look at perdition which appears to have been designed with this specific task in mind.

Whois Proxy provides a CGI or command line whois proxy tool.

Whois Proxy is a Perl whois tool for looking up the owners, technical contacts, abuse desk, IP address, NIC handle, or ASN of any domain on the internet.

A complete rewrite of the GeekTools whois proxy, it also runs either as a Web application or on the command line but has a few more features.

The Web interface is validated strict XHTML and CSS2.

rsh.proxy project is a proxy for rsh, rexec and rlogin.

About rsh

rsh (remote shell) is a command line computer program which can execute shell commands as another user, and on another computer across a computer network. The remote system on which the rsh executes the command needs to be running the rshd daemon. The rsh command shares the same name as another common UNIX utility, the restricted shell, which first appeared in PWB/UNIX; in System V Release 4, the restricted shell is often located at /usr/lib/rsh.

About rlogin

rlogin is a Unix software utility that allows users to log in on another host via a network, communicating via TCP port 513. It was first distributed as part of the 4.2BSD release. rlogin is also the name of the application layer protocol used by the software, part of the TCP/IP protocol suite. Logged-in users can act as if they were physically present at the computer.

Mobile Web Proxy is a (CGI) tool to make more Web pages available from some mobile devices (cell phone Web browsers, etc.).
When I began using my cell phones mobile web browser, one of the things I realized was that there were a lot of web pages that my cell phones web browser simply wouldnt let me see. My shiny new Motorola Razr from T-Mobile, for many pages, would display an error message like "413: Page cannot be displayed." It happened annoyingly often; browsing the web from my cell phone was a lot like trying to read a book or a magazine with large chunks simply ripped out. And when I tried troubleshooting, I might have missed something, but it seemed like a big problem without an easily available solution.
So I tried to provide my own solution. I made a proxy that would present webpages for the mobile web so that they would display in a way that would work for my cell phones web browser. Technologies include paging, tag cleaning, and optional caching to improve performance, but without getting into technical details, this means that I can access some pages on the web that I couldnt access earlier.
Enhancements:
- A bug that caused the script to spuriously report 404 errors was fixed.
- A smaller default page size was set so that tag-rich pages would be rendered in a way more likely to be displayable on mobile Web browsers.

BlockStop Proxy is a Firefox extension that allows you to view the current page or link using.

Adds a "View this page with BlockStop" or "Open Link Target with BlockStop" option to your Firefox right-click menu, depending on where you click. The BlockStop Proxy extension automatically encodes the target url to maintain anonymity.

Japt-Proxy is a JAVA based Caching Proxy for Debians APT-System. Japt-Proxy is very reliable and lightning fast. Japt-Proxy is usually used in environments where several Debian systems have to be kept up-to-date without downloading the same files over and over again from the debian mirrors. Mostly these environments are data centers, Linux-powered companies, schools, public authorities and so on.
Often Japt-Proxy is used because of small sized internet connections but it is also useful to install complete debian systems over the net (read: over the proxy). Even with high volume internet connections Japt-Proxy can dramatically reduce the time to install or update Debian on many machines.
Why Java?
I know there are people out there thinking "Hey? Why Java?". There are a bunch of reasons why people asking those questions. I have a simple answer to all those questions. The answer is, that Java enabled me to easily develop the fastest and most reliable APT-Proxy. Java and the Apache Software Foundation provides such good libraries for this job, that it wasnt very hard to bring up this tool.
If you dont trust, test it - the installation takes less than five minutes!
Doesnt a general proxy server supersede an APT-Proxy?
No, it doesnt. Japt-Proxy knows the characteristics of a Debian archive and their files. It knows, for example, that .deb files wont change, because newer files would have a new name (the version is always part of the filename), hence it wont recheck if there is a newer version of this specific file.
Furthermore you can configure the Japt-Proxy to delete old versions of a package in its cache directory - a general proxy cache would simple delete files that havent been requested for some time.
So, a general caching proxy like Squid is a perfect tool for caching "normal" internet traffic. If you need a proxy for faster APT access - Japt-Proxy is the right tool for you.
Main features:
- Caching of all apt requests from Debian archives
- Multi-threaded architecture which increases the download speed enormously when several machines are requesting packages
- Builds up a partial mirror directory automatically, with exactly the same directory structure and filenames as the original mirror
- Automatic and configurable cache cleanup (purging packages in cache if newer versions exists)
- Makes sources.list configuration easier for multiple machines - if you change your internet backend server you only have to make the change once in Japt-Proxy, instead of on all Debian machines
- Works with multiple architectures
- Backend support for HTTP and FTP
- existing .debs can be copied into the Japt-Proxy cache directory (from a CD or DVD for example) and will be used by the Proxy automatically

IMAP Calendar Proxy implements an HTTP proxy that converts HTTP PUT requests of vcalendar data to separate messages stored on an IMAP server.

IMAP Calendar Proxy project can be used with Mozilla Sunbird/Calendar to allow storage of a calendar via IMAP.

There are many issues with the program in its current state. Consider it alpha quality, and you may lose calendar data if you use it. Its more of a proof of concept right now. Its rather slow if you have a large calendar.

Ideally IMAP support should be built into Mozilla. This is just a hack. Id like to hear any feedback on how it works. See the TODO file for features Id like to implement.

Sunbird can post calendars to a remote HTTP server via HTTP PUT and to
synchronize via a GET before a PUT. This proxy should run on the same system
you run Sunbird on. It makes a connection to an IMAP server and selects
a specified folder.

It then retrieves all calendar data from that server and caches it it memory. Any changed to the calendar are HTTP PUT to this proxy, and it determines what to do on the IMAP server (delete, change, add). Instead of posting the whole calendar back to the server, it only posts the differences.

If you run the proxy elsewhere on the network, you will not get any bandwidth
savings because the HTTP PUT and GET are still done over the network.