Different times of day IIS (7, windows 2008) starts serving pages extremely slow. I checked through the LOG's of IIS and did not find anything...I disabled all the robots from scanning the site but to no avail.
Only thing that helps is...if I disallow ALL external IP addresses and only allow internal (office IP). which makes me think it could be a DDos Attack? however why IIS logs don't show any Attack IP's? Logs just look normal or AM i missing something?
Even other website hosted on the Same Box starts serving slow pages as well...but the second I turn on IP restrictions on Primary website everything starts working normally.
I checked SQL Server Queries as well with profiler and nothing suspicious.
even if I try to serve a simple HTML page it takes few seconds to load.
Where should I start from? any hints to resolve this issue?