Hi!
You can use iptables on the same machine: if you patch it with the string 
patch, you can drop packet with "cmd.exe", "root.exe", "default.ida", and 
so on...
Try something like this:

#!/bin/sh
#Put here your external interface
EXT_INT=eth1

iptables -I INPUT -p tcp -i $EXT_INT --dport 80 -m string --string 
"/cmd.exe" -j DROP
iptables -A INPUT -p tcp -i $EXT_INT --dport 80 -m string --string 
"/root.exe" -j DROP
iptables -A INPUT -m state --state REALTED,ESTABLISHED -j ACCEPT
<and so on>

At 09.49 28/01/2002 +0000, you wrote:
>Dear All
>
>Is there a way to stop apache responding to .exe file requests altogether?
>
>I am getting fed up with my error_log file being filled by nimbda and we 
>don't host any .exe files!! I have been monitoring
>it since the summer and the number of nimbda type entries appears to have 
>started to go up again since xmas...

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