On 2003-02-25 16:09, Joshua Lokken <[EMAIL PROTECTED]> wrote: > When I remove the default deny rule from the list, nat works fine, > port redirections and all, but with the deny rule in place, nat > isn't working, so I'm thinking I have a rule in the wrong place. > Can anyone point out any obvious missing/misplaced rules here?
For NAT to be working, you hav to make sure natd(8) is running and has a proper configuration file. Now, as far as the ipfw(8) rules are concerned, try using the following ruleset: # $fwcmd -f flush # $fwcmd add allow all from any to any via lo0 # $fwcmd add divert natd all from any to any via $oif # $fwcmd add allow icmp from any to any icmptypes 3,4,11,12 # $fwcmd add check-state # $fwcmd add allow udp from $oip to any via $oif keep-state # $fwcmd add allow tcp from any to $oip 22,80,443,6346,22002,22003,22010 setup via $oif keep-state # $fwcmd add allow ip from $oip to any keep-state out via $oif # $fwcmd add allow ip from $inwr to any keep-state via $iif # $fwcmd add 65435 deny log ip from any to any The changes from your own set of rules are summarized below: - moved icmp checking higher, since they're unrelated to tcp or udp and state checking - added a rule for udp packets, since DNS resolving and a few other useful things depend on them - moved check-state higher, to minimise the delay for packets that are parts of an existing connection (ipfw rules are checked sequentially, from start to end) - added keep-state in your 'setup' rule for incoming connections to $oip and 'via $oif' to make sure that packets destined for $oip are only accepted on $oif (good measure against spoofing) Before using this set of rules, make sure you give proper values to $iip, $oip, $iif, $oif and $inwr. - Giorgos To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message