Revision of Configuring internet connection behind Microsoft ISA proxy from Fri, 06/22/2012 - 22:01
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@TODO WORK-IN-PROGRESS
[malberts] The solutions and steps described here were arrived at after playing around with settings for many days. As such I do not have a definite guide and I cannot verify the settings because it does not apply to my computer and network. If your internet proxy uses Microsoft ISA Server and you got this to work, please add to this guide.
Who needs this?
If your internet connection requires the use of a Microsoft ISA Server proxy.
If you are unsure, ask your ISP if the proxy is managed by a Microsoft ISA Server.
If you are still unsure, you can try to deduce this from some error messages such as: '' 407 Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied. ) ,,
If your ISP supplies you with a username in the form of "SOMETHING\username" then you might be using such a proxy.
How to get the internet working?
Versions of Trisquel before 5.5 had a GNOME utility to set proxy information. This might or might not work.
For the rest of this manual it is assumed that you are running Trisquel 5.5.
The solution comprises two utilities:
- proxydriver
- cntlm
proxydriver is not in the Trisquel repository but can be downloaded from SourceForge. It is released under the GPLv3 license.
It detects when a connection is made with NetworkManager and updates proxy settings accordingly.
cntlm is in the Trisquel repository but if you do not have internet access you will have to download it directly from Trisquel's online package list.
It sends the correct authentication information needed to connect to the ISA proxy.
In both cases the package can be installed with:
sudo dpkg -i package_name.deb
where package_name.deb should be replaced with the name of the file you downloaded.
