[ ... ]Using an fresh install of FBSD 5.2 RC2 I am trying to get stateful rules to function. For some reason ipfw2 seems to be issuing an ICMP:3.3 packet to my ISP's dns.
# Internal gateway housekeeping $cmd 00100 allow all from any to any via lo0 # allow all localhost $cmd 00105 allow all from any to any via xl0 # allow all local Lan $cmd 00110 check-state log logamount 500 $cmd 00150 divert natd all from any to any $cmd 00170 count log logamount 500 all from any to any $cmd 00310 allow log logamount 500 tcp from any to any 53 out via rl0 setup keep-state $cmd 00311 allow log logamount 500 udp from any to any 53 out via rl0 keep-state $cmd 00315 allow log logamount 500 tcp from any to any 80 out via rl0 setup keep-state $cmd 00350 allow log logamount 500 icmp from any to any out via rl0 keep-state $cmd 00500 deny log logamount 500 all from any to any
Something like the following would be better in terms of DNS and not blocking essential types of ICMP traffic:
allow tcp from any to any 53 out via rl0 setup keep-state allow udp from any to any 53 allow icmp from any to any icmptypes 0,3,4,8,11,12
This allows bidirectional UDP-based DNS queries, but only outbound long (TCP-based) DNS queries like zone-transfers. YMMV, and it may not solve your problem-- it looked like your queries were coming from an internal host (10.0.10.5) using NAT? Are you sure that natd is okay? Maybe put the divert statement before the "check-state" rule?
-- -Chuck _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
