snort on router - risks?

[Marcus Schopen <lists@localguru.de>]

Hi,

on my DSL-router (masqurading) at home I'd like to install snort to see 
who attacks me from the internet side. I know that one should install 
snort on a seperate hosts before and behind the firewall to get the best 
results, but this is just my little "home net" and I don't want to set 
up further linuxboxes.

So my question: what are the risks to set up snort on the gateway-router 
instead of using a seperate snort host? Is that insecure? And why?

Thanks
Marcus