What is this vistor trying to access?

And should I worry about it?

[purple_cat]

Can anyone explain what's going on in the GET part of these entries in my log file? Is the .dll file on the server? And I don't have a file called cltreq.asp on the site. Should I worry about these?

218.154.254.103 - - [20/May/2004:03:42:25 +0100] "GET /_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0 HTTP/1.1" 404 303 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)"

218.154.254.103 - - [20/May/2004:03:42:26 +0100] "GET /MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0 HTTP/1.1" 404 303 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)"

Any help much appreciated. I'm still very much a newbie - but have learned so much from Webmaster World! Thanks!

[robotsdobetter]

Are you using Microsoft windows on your server?

[creative craig]

This topic has been talked about many times do a site search and there are lots of threads.

[webmasterworld.com...] I recommend this one :)

[webmasterworld.com...]
[webmasterworld.com...]

Craig

[Sanenet]

It's a user - probably a bot or a virused machine - that's scanning your site looking for certain vulnarabilities. If you don't have these things (looks like old FP extensions?) installed on your machine you shouldn't worry too much about them - we all get them!

[purple_cat]

Brilliant! Thanks for your responses. More to add to my knowledge bank!