Tuesday, 28 April 2009

Load testing a WCF web-service gives a 403 error on IIS 5.1 (XP Pro)

If you're hosting a WCF web service using XP Pro's IIS and checking its thread-safety by hitting with > 20 threads, then its likely you'll be seeing some 403 errors.

This is unfortunately by design. See Jeff Atwood's article on why and how to get around IIS 5.1's shackles.

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