I have a long standing IIS 7.5 box that suddenly stopped working mid morning today. Something has obviously changed but I have been unable to determine what and would appreciate any suggestion.

All of the sites on the IIS server have started returning the same error page when viewed locally - HTTP Error 404.4 - Not Found The resource you are looking for does not have a handler associated with it.

The server has a number of web sites on it, mostly asp.net but there are some others.

Things I have tried (in no particular order) -

I'm at a loss now for ideas so would appreciate any suggestions.

1 Answer 1


I've found the source of this. A global rewrite rule had been setup that was redirecting everything.Disabling this meant all the sites were working again.

All I need to do now is figure out who made the change and have a quiet word with them!

  • It is always hard to track down such changes, blogs.iis.net/webtopics/… So a better idea is to log who logged on to that server and confront that guy.
    – Lex Li
    Aug 17, 2020 at 18:22
  • If only I'd know about that before, thanks for the link
    – Steve
    Aug 18, 2020 at 8:49

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