Core Issue
This problem applies to Windows Operating Systems (OS) upgraded to versions 2000.4.3, 2000.4.3a, or 2000.4.3aSR1.
Resolution
This issue is documented in Cisco bug ID CSCse78153.
In order to resolve this issue, change the value of the RemoveServerHeader in urlscan.ini. Go to C:\Winnt\system32\inetsrv\URLscan\urlscan.ini, and change the value from 1 to 0. Then, reboot the server.