I got some interesting visitors according to "Recent visitors log".

They try to visit only 1 thing on my site.

/cgi-bin/formmail.pl

However this resources not exist,at least 10 different IP shown in the log,probably doing by
robots.

Only one thing is not change ->> Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; DigExt)

As i assume these plp want to send Spam emails,or just try the security settings of the site/host.

Is is possible to setup "sandbox" for this visitors to find out what really want to do?
However i setup a redirection for this visitors to  visit yahoo.com

Here is the latest one:
Host: 68.11.201.113
                                Url: /cgi-bin/formmail.pl
                                                              Http Code : 301
    Date: Sep 11 01:20:11
                                Http Version: HTTP/1.1
                                                              Size in Bytes: 311
    Referer: -
                                                              Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; DigExt)

Any idea?