I have a web service application running on Windows Server 2008.
A number of clients are complaining about network connectivity issues and I am trying to diagnose the issues. My IIS Log files do not have any entries for the majority of the requests that I can identify as having failed.
My suspicion is that these failures due to network connectivity failures closer to the client end, but I'm trying to cover my bases on all ends.
Is there a class of connection failures that would cause a request to be rejected/dropped by IIS/Windows that would cause it to not even be logged by IIS?
Are there any other log information sources that I can dig into to identify failed connections of this kind (low-level TCP connection rejected logs etc?)
The failures that I'm seeing for a given client are intermittent so it is unlikely that they are being blocked by a firewall etc.
Any help would be appreciated.