Free barracuda proxy software for linux

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.

Apache::ProxyConf is a Perl module that can generate proxy configuration for browsers.

SYNOPSIS

# In httpd.conf:

< Location / >
SetHandler perl-script
PerlHandler Apache::ProxyConf
PerlSetVar ProxyConfConfig "/some/location/proxyconf.ini"
< /Location >

The Apache::ProxyConf is used to configure the proxy settings in browsers automatically. The modules returns a script that conforms to the Navigator Proxy Auto-Config File Format. The module is suitable for large scale installations that have multiple (cascading) proxies. It can be used to return the closest proxy based on the network topology. Failover and load distribution is also provided.

Browser configuration

The (virtual) webserver must be entered in the Autoconfigure URL of the browser to make use of the ProxyConf script.

http://proxyconf.some.domain/

In IE the URL must be specified in the Address field, just below the Use automatic configuration script tickbox.

THE CONFIGURATION FILE

The ProxyConf module first reads a .ini-style configuration file to determine the proxy settings of the network. The configuration file contains three sections: proxy, noproxy and https.

The proxy section

The sections proxy and https have an identical format. They contain lines of the form subnet=proxyip:port.

Single proxy

[proxy]
172.16.32.0/20=172.16.32.10:3128

The subnet 172.16.32.0/20 has a single proxy defined. The proxy server is 172.16.32.10 and it listens on port 3128.

Multiple proxies

[proxy]
172.16.0.0/20=172.16.0.10:3128,172.16.0.20:3128

Multiple proxy servers are defined in a comma separated list. In this example clients in the 172.16.0.0/20 subnet use 172.16.0.10 as their primary proxy server. When this server becomes unavailable, the clients will move over to 172.16.0.20 for their proxy requests.

Multiple proxies with load distribution

[proxy]
172.16.0.0/20=(172.16.0.10:3128,172.16.0.20:3128)

When proxy servers are placed between brackets, the load is distribution amongst the proxies. Some clients will have the first proxy as primary and some clients will have the second proxy as primary. The other proxy is used as a backup. The order in which the proxies are tried depends on the IP address of the client. The script is deterministic, so for a given IP address the priority list is always the same.

To determine the proxy list for a given IP address multiple rules may be applied. Subnets are tried from the highest to the lowest mask. The module puts all proxies that are found in a list.

The noproxy section

The noproxy section contains hosts that should be contacted by the clients directly. Noticeably, web servers that use NTLM authentication will not work when clients connect to them via a proxy server. The syntax for specifying noproxy hosts is subnet=fqhn1,fqhn2,... Alternatively, the multiline syntax can be used, as shown in this example.

[noproxy]
0.0.0.0/0=<<less