Check_404 is an addon for the SRE-http web server. It's function is to detect "repetitive" requests for non-existent URLs from a client (that is, requests that yield a 404 response code) .

Such events may be due to a probing attack by a malfeasant hacker attempting to find password and other such files.

CHECK_404 provides a means for detecting, and appropriately dealing with, this situation.

Or, are you ready do download the latest version of chk404.zip (updated 4 January 2000, size= 10K)