Currenty in our network we have TMG 2010 and we would like to use Sophos Web Appliance as upstream proxy for TMG. I have configured SWA, but I'm having problems when I configure Web chaining in TMG.
USER->TMG->SWA->Internet
When I enable web chaining to SWA on TMG strange error occur, some sites enter endless redirect loop, on some sites only default site works. IE. http://stackoverflow.com enter endless loop, while http://lazic.info loads default site, instead of virtualhost site. It's like SWA is requesting sites per IP, and not per fqdn. I have tried changing DNS our internal DNS, ISP, and OpenDNS, always same error.
SWA is deployed as Explicit proxy, has some static routes defined, and all checks in Connectivity test are OK.
Strange thing is that if user enters proxy address manually in browser everything works OK.
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