Ok here is the scenario. I have a client that has two service providers. L3 which are their main T1 lines that they use and TW Telecom that they use for their Guest network and backup T1 Line. Recently company users have had issues accessing a secure site. In my troubleshooting I found that if I put them on the Guest network they were able to access the site just fine.
I've contacted L3 and they are working on the issue but are having trouble determining the cause. In the meant time I thought of setting up a Proxy Server that accesses the Guest TW line for internet for the users that require access to this site.
I have a Windows 2003 Server that is doing nothing so need help in the best way to set this up. Do I move the server to the Guest Network and make it a proxy server that we access from the public ip of the TW line or can I keep on my L3 network on one NIC and use the other NIC to connect to the TW network?