[Xitami] Why is this crashing me?

[meijin]

Can anyone explain to me how to keep the following from crashing my Win2K
Xitami server at least twice a week?

66.21.214.27 - - [15/Jul/2002:20:18:19 -0600] "GET
/default.ida?NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNN%u9090%u6858%ucbd3%u7801%u9090%u6858%ucbd3%u7801%u9090%u6858%ucbd3%
u7801%u9090%u9090%u8190%u00c3%u0003%u8b00%u531b%u53ff%u0078%u0000%u00=a%20
HTTP/1.0" 404 0 "" ""

NeoTrace tracks this down to a Bellsouth user in Miami, FL...so I am going
to send them a nastygram about it. But, I believe this is the Code Red
virus...yes? Isn't there some way to block this or keep Xitami from choking
on it every time I get hit? This is getting real old real quick.

Thanks for any input!

Mike