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Old 12th October 2009
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jggimi jggimi is offline
More noise than signal
Join Date: May 2008
Location: USA
Posts: 7,719

Block and Pass normally work via "last matching rule wins". If all of your pass rules are for other protocols, then a block for ICMP may go anywhere.

If you add the "quick" parameter to a rule, if the rule matches, PF stops testing the packet and performs the block or the pass immediately.

Blocking ICMP can block proper use of TCP/IP, and cause some applications to fail.
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