Bypass external proxy in web chaining for one URL

isa-serverPROXY

We have an ISA in a school that has to pass all traffic to the local authority's proxy to get to the internet. We do that in the web chaining rule.
The local authority have created a website on their LAN that the school needs to get to – i.e. between the ISA and the proxy. What we need is a bypass to the web chaining rule for one site only. The exception part in the chain doesn't seem to help us.

How would we go about doing that?

Additional info: If we put a laptop on the WAN side of the ISA and configure the proxy in IE to use the proxy but with an exclusion for the Local Authority URL then we can visit the site.

Thanks.

Best Answer

if you put an extra 'direct access' web chaining rule for a specific destination in front of the default rule, it will apply that rule first and access the local size directly.

alterantively, you can create a firewall exception for that specific destination + port and deploy modified proxy configurations to selected client browsers to bypass the proxy selectively - but that is usually much more of a configuration hassle ...