Well, you should provide those details. What about my last question? Does the Internet traffic on the remote site get forwarded through the VPN so it can reach the gateway on the local site? What is the network addresses used in both sites. Does other traffic work between the two sites? Does non HTML traffic reach the Internet on both sites. Try tracerouting to a location on the Internet from both sites. Is the route taken as you expect?
A transparent proxy will be either inline between the LAN traffic and the gateway device, or will be a part of the gateway device itself. Being transparent means the browsers don't need the proxy settings and will use the default gateway as if there was no proxy.
Does other traffic work? For example, ssh'ing between two hosts on each site, or pinging
www.Google.com. If this non web traffic works, then you may have a proxy configuration problem, instead of a network configuration problem.
You mentioned that you are using a hub. Please verify that you are using a hub and not a switch. If you are using switches, are you using VLANS to segment the switches?
If we can eliminate network issues as being the cause through testing (trial and error) then you might want this thread moved to the Linux Software forum. We aren't there yet however.
