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Post  Post subject: FreeBSD PF supported icmp types  |  Posted: Fri Jan 28, 2011 9:15 am
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FreeBSD PF supported icmp types

Here are the ICMP types supported by FreeBSD / OpenBSD PF firewall:

Here is the pf.conf syntax for allowing icmp packets:
Code:
icmp_types="{ echoreq, unreach}"
pass in log on $ext_if1 inet proto icmp from any to $dmz_net icmp-type $icmp_types keep state #queue icmp

And below is a list of supported icmp types:
Quote:
"net-unr",
"host-unr",
"proto-unr",
"port-unr",
"needfrag",
"srcfail",
"net-unk",
"host-unk",
"isolate",
"net-prohib",
"host-prohib",
"net-tos",
"host-tos",
"filter-prohib",
"host-preced",
"cutoff-preced",
"redir-net",
"redir-host",
"redir-tos-net",
"redir-tos-host",
"normal-adv",
"common-adv",
"transit",
"reassemb",
"badhead",
"optmiss",
"badlen",
"unknown-ind",
"auth-fail",
"decrypt-fail",



They can be found in pfctl source files: /usr/src/contrib/pf/pfctl/pfctl_parser.c

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