I have a fairly restrictive ipfw setup on a FBSD 8.2-STABLE machine.
Pings were not getting through so I added this near the top
of the rule set:
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# Allow icmp
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${FWCMD} add allow icmp from any to any
It does work but, two questions:
1) Is there a better way?
2) Will this cause harm or otherwise expose the server to some vulnerability?