I'm seeing entries in my /var/log/httpd/access_log like this:
218.11.46.239 - - [07/Jun/2004:14:40:51 -0400] "GET
http://surfcorp.com/s.php?uid=21030&...bmit=Go+now%21 HTTP/1.1" 404 305 "http://xxxadulthost.net/" "Mozilla/4.0 (compatible; MSIE 5.5; Windows ME)"
So what exactly does this mean? Why is this showing up on my server logs? Is this the result of someone who has spyware on their browser? Can these "hits" result in high loading of my server?
Is this something I can stop with my firewall?