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Old 11th October 2009
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Carpetsmoker Carpetsmoker is offline
Real Name: Martin
Tcpdump Spy
 
Join Date: Apr 2008
Location: Netherlands
Posts: 2,241
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Not so difficult I would say:
Code:
block in on $ext_if inet proto icmp all
Or block all ICMP except ping:
Code:
pass in on $ext_if inet proto icmp all icmp-type echoreq keep state
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