Hi; I have the following scenario.
FreeBSD 8.2-STABLE FreeBSD 8.2-STABLE #0: Thu May 19 19:53:59 BRT 2011 i386 I want to be able to connect to any of the 2 external IPs this machine has. ### pf.conf excerpt ext_if1 = sis0 (1M link. default gateway) ext_if2 = rl0 (2M link) aln_if = dc0 (Internal LAN) ext_gw1 = A.A.A.A ext_gw2 = B.B.B.B my_ext_ip1 = a.a.a.a my_ext_ip2 = b.b.b.b nat on $ext_if1 from any to any -> $my_ext_ip1 port 1024:65535 nat on $ext_if2 from any to any -> $my_ext_ip2 port 1024:65535 1) ----------------------------------------- # balance the load pass in log quick on $aln_if route-to ($ext_if2 $ext_gw2) from \ $aln_if:network to any flags S/SA keep state tag to_out probability 70% pass in log quick on $aln_if route-to ($ext_if1 $ext_gw1) from \ $aln_if:network to any flags S/SA keep state tag to_out 2) ----------------------------------------- # allow ssh on ext_ifs a)pass in log quick on $ext_if1 inet proto tcp from any to any port $SshPort \ flags S/SA modulate state (max 30, source-track rule, max-src-nodes 10,\ max-src-states 2, max-src-conn 2, max-src-conn-rate 2/60, overload <banned>) b)pass in log quick on $ext_if2 reply-to ($ext_if2 $ext_gw2) inet proto tcp \ from any to any port $SshPort flags S/SA keep state (max 30, source-track \ rule, max-src-nodes 10, max-src-states 2, max-src-conn 2, max-src-conn-rate\ 2/60, overload <banned>) ( RULE 8 ) [snip][snip]...... 3) ----------------------------------------- pass out quick on $ext_if1 route-to ($ext_if2 $ext_gw2) from $ext_if2 to any pass out quick on $ext_if2 route-to ($ext_if1 $ext_gw1) from $ext_if1 to any Also tried: pass out quick on $ext_if1 route-to ($ext_if1 $ext_gw1) from $ext_if1 to any pass out quick on $ext_if2 route-to ($ext_if2 $ext_gw2) from $ext_if2 to any block log all ( RULE 163 ) ### end of pf.conf excerpt Everything under 1) works fine. Under 2), a) works, b) not working. When I try to connect to $SshPort through the 2M link (b.b.b.b). I connect to the server, but the return packet neither obeys the reply-to on rule b), nor matches any of the pass outs under 3), and goes straight to the block rule. as you can see bellow. [$]> tcpdump -n -e -ttt -i pflog0 host 187.113.99.63 (my home IP) Packet arrives and matches rule b)/8 and should create a state; 00:00:00.000000 rule 8/0(match): pass in on rl0: 187.113.99.63.25806 > b.b.b.b.22: [|tcp] but... 00:00:00.000108 rule 163/0(match): block out on sis0: a.a.a.a.8947 > 187.113.99.63.25806: [|tcp] 00:00:03.000057 rule 163/0(match): block out on sis0: a.a.a.a.65060 > 187.113.99.63.25806: [|tcp] 00:00:03.199931 rule 163/0(match): block out on sis0: a.a.a.a..20213 > 187.113.99.63.25806: [|tcp] 00:00:03.199618 rule 163/0(match): block out on sis0: a.a.a.a..19748 > 187.113.99.63.25806: [|tcp] 00:00:03.200044 rule 163/0(match): block out on sis0: a.a.a.a..1600 > 187.113.99.63.25806: [|tcp] 00:00:03.199767 rule 163/0(match): block out on sis0: a.a.a.a..45513 > 187.113.99.63.25806: [|tcp] 00:00:06.205048 rule 163/0(match): block out on sis0: a.a.a.a..17925 > 187.113.99.63.25806: [|tcp] it tries to go back to me on the wrong interface (sis0 and NOT rl0), wrong ip (a.a.a.a and NOT b.b.b.b), and from several wrong port numbers, not port 22. Questions: 1) sshd is listening on *.22. I know that the default gateway is not on rl0 but isn't that what reply-to is supposed to beat? If I understood correctly, wasn't the reply-to supposed to make the packet go back throught the specified ($ext_if2 $ext_gw2)? 2) Wasn't a state created when the pass rule b)/8 matched? if so, where is it? Where am I doing wrong here? Thanks for any hints. -- Mario Lobo http://www.mallavoodoo.com.br FreeBSD since 2.2.8 [not Pro-Audio.... YET!!] (99% winblows FREE) _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
