Hi all,
We have several IIS server farms all with the same problem - when you open IIS Manager and drill down through the sites, once you click on the little + plus button to navigate and expand the site, it takes over 10 seconds for the list of sites to appear.
Up until now, I had no idea what was causing it. But today I finally found out - it's the URL Rewrite Module!
Try this out -
Build a clean server (2008 R2) and install IIS. Open IIS Manager and drill down to the default site - everything is nice and fast.
Now install the URL Rewrite Module. Open IIS Manager and try to drill down to the default site - notice how it takes 10 seconds to expand the sites navigation.
So at long last I've figured out what was causing the IIS Manager delays but I wonder is there any way to fix it? If I was to guess, I would say perhaps the URL Rewrite Module is trying to connect to the intenet or use DNS and since DNS, HTTP and HTTPS are blocked on this server, the delay occurs.
Any thoughts?