nt web server log

["k. frisco" <kfrisco @ shrike . depaul . edu>]

Withh all the talk about hacking webservers, I was wondering if anyone
knows anything about a weird log msg that we got on our nt webserver?  it
was a get to robots.txt

There is no file or image that is related to this file name on our web
page.  Could not even find it on the server anywhere.  Am I unduly
concerned?