The HTTPERR folder on my Win 2008 IIS Server is suddenly being slammed with significantly more log files than usual, up to 80 now in just one day, each one shows thousands of lines with POST as the cs-method, QueueFull as the s-reason, and all from the same 4-5 IP addresses repeating over and over again. What is happening here and is there any way to stop it? I believe the queue being full is causing my web sites to produce the HTTP Error 503 that has shown up since this began. Any suggestions or help would be appreciated.
Here is an example of what the log files are showing:
2014-12-31 16:28:08 198.12.68.138 58912 65.215.71.131 80 HTTP/1.0 POST /xmlrpc.php 503 7 QueueFull DefaultAppPool
It is the same thing over and over again, from the 4-5 same IP addresses.