I was running my hfs the other day when my xp2800 AMD 512 GiB of ram RAID 0 computer started slowing down alot..
I ended up flipping over to my black ice firewall to notice that someone was succeeding with a hex evasion attack directed on my system...
Time, Event, Intruder, Count
10/26/2003 6:26:39 PM, HTTP_IIS_Double_Eval_Evasion, cm185.gamma224.maxonline.com.sg, 1
Time, Event, Intruder, Count
(description:http://www.iss.net/security_center/reference/2106051.html)
10/26/2003 6:26:39 PM, HTTP_IIS_Hex_Evasion, cm185.gamma224.maxonline.com.sg, 1
(description:http://www.iss.net/security_center/reference/2106055.html)
... at least 100 of these instances were experienced... I blocked these users and the lagging stopped, so I am not 100% sure to make out of this.