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IWSS as Upstream proxy - Error "Forwarding loop detected"

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IWSS as Upstream proxy - Error "Forwarding loop de... - 29.Dec.2005 4:13:53 PM   
pdr

 

Posts: 1
Joined: 6.Sep.2005
Status: offline
Hi there,

We have installed IWSS 2.5 (TrendMicro Web Security Suite) on a ISA 2004 machine.
Say 1.1.1.1 is the external interface and 10.1.1.1 the internal one.
Chaining is configured as follows: Client -> ISA -> IWSS -> internet
ISA listens for client requests on 10.1.1.1:8080
IWSS listens for client requests on 10.1.1.1:8081
ISA has a web chaining rule to forward request to 10.1.1.1:8081

If IWSS web chaining rule is disabled, default rule applies OK and internet web pages are accessible (no virus scanning).
When IWSS web chaining rule is enabled, IWSS sends back an error page with "Forwarding loop detected" error.
Apparently, IWSS doesn't like to receive HTTP requests from the same machine it is installed on.
I have tried to access the internet from the ISA server itself, using IWSS directly as proxy, and the error is the same.

From forums, it seems there is a similar issue with squid on but the error is just logged and does not prevent content from being downloaded.

Has anyone any idea ?

Thanks in advance for your most appreciated help !

Philippe
Post #: 1

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