I managed to install squid, transguardian and firestarter on ubuntu 8.10. Locally it works. I setup the proxy settings of firefox to 127.0.0.1:8080 and works perfectly. when I did the same on windows machine (meaning configured ie) it did not work. Now I need two things. One to configure the proxy to be transparent and to connect other hosts to this linux machine without the need to amend any setting in the connection of the internet browser.

Welcome to LQ.

I'm not sure what you've got & what you are trying to do w/ it, starting w/ your title. Isn't squid the proxy, not Dansguardian? And what is this "transguardian" that you mention in your post?

Is the Ubuntu 8.10 box on which you "managed to install squid, transguardian and firestarter" a dedicated firewall/router/gateway, or a workstation that is doing double duty?

If you are asking Ubuntu 8.10 to do double duty, I would find an old "doorstop" & set it up as a dedicated firewall/router/gateway. I would not use any desktop or even server distro for this function, I would install a specialty distro on a dedicated box, like:

• SmoothWall Express | Wikipedia link | freshmeat link |
• IPCop | Wikipedia link | freshmeat link |
• pfSense | Wikipedia link | freshmeat link |
• m0n0wall | Wikipedia link | freshmeat link |
• OpenBSD Live-CD Firewall | Wikipedia no entry | freshmeat link |

(I have worked w/ the 1st 2, extensively w/ SmoothWall Express)

First it is possible that the reason it did not work from your external box is that your firewall might have been turned on and blocking external requests.

As far as setting up the transparent proxy, this worked for me.

http://www.faqs.org/docs/Linux-mini/...rentProxy.html

You may need to make adjustments to the port assignments depending on if you want the traffic to go through squid only or to hit transgaurdian first.

I managed to solve the issue. The problem was routing protocol towards the right protocol meaning port 80 to 8080. thanks