[Snort-sigs] newbie rule writer

Steve Postma spostma at ...723...
Mon Aug 5 12:06:19 EDT 2002

I am trying to modify my rules so that any pings from the machine at does not result in an alert. 
I have tried the modification below, but am getting this error. snort snort:
FATAL ERROR: ERROR icmp-info.rules (33): Illegal direction specifier: any"
What is the correct syntax to remove one IP from a rule?
alert icmp ! any,$HOME_NET any -> $EXTERNAL_NET any 
Thanks for your time, 
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