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icmp traffic: which port shuold be filtered, which not

I would like to filter as much icmp traffic as I can.
I use IP-filtering (I do not need masquerading).

Should I allow forwarding of icmp packets between local and
outside networks? For which ports?

May i limit icmp traffic to packets directed to (or
originated from) one of the firewall interface only?  Do You
think this is advisable?

Please suggest documentation on this topic; I am a bit
confused at the moment.

thank you

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