Help with pf ruleset

erik Wilson erik.mlists at
Sun Mar 9 13:47:00 UTC 2008

I'm pulling my hair out here. I've been working on this for days without
any success.

I've whittled the ruleset down to the barest possible rules and even that
doesn't work. I'm at my wits end. I would really appreciate it if someone
could show me where i'm being a complete and total moron.

Here's the situation. I have a somewhat unique environment. It consists of
2 WAN's, an internal LAN, and numerous VLANS (isolated clients, which need
to be accessible from the internet, but not to each other). This runs in a
VMWare esx server, but that's not really important.


em0 = lan (10.0.0.x)
em2 = WAN1 (y.y.y.y) (dhcp)
em3 = WAN2 (x.x.x.x) (static /28 subnet)

the default gateway is on nic2. nic3 will need to forward ip:port's to
various vlans. nic2 is used for all outbound lan traffic (internet). nic2
will need to failover to nic3 eventually, and nic3 will have to failover to
nic2 (for outbound, obviously no choice for inbound).

So here's the problem. I can't even get nic2 or nic3 to respond to a ping
request from outside my network when pf is enabled. I know the interfaces
are set up correct, as I can ping the default gateways of both interfaces.

Also, outbound NAT works perfectly on wan1.

Here's my ruleset.

set block-policy return
set skip on lo0
nat on $wan1_if from $lan_if:network to any -> ($wan1_if)
block in log
pass out log keep state
pass in log inet proto icmp all icmp-type echoreq keep state
pass in log quick on $lan_if

Looks simple enough, right? Why won't it work? All i want is to get a ping
from both of the firewalls WAN's from outside the network.

Any ideas?

Routing tables

Destination        Gateway            Flags    Refs      Use  Netif Expire
default            y.y.y.129       UGS         0     4433    em2        link#1             UC          0        0    em0           00:0c:29:a9:e5:75  UHLW        1      338    em0   1177           00:0c:29:c0:74:57  UHLW        1     3291    em0   1041          00:19:db:b1:07:78  UHLW        1     4827    em0   1185        link#7             UC          0        0  vlan0        link#8             UC          0        0  vlan1           00:0c:29:e9:8c:d2  UHLW        1      251  vlan1   1190        link#9             UC          0        0  vlan2           00:50:56:9c:53:89  UHLW        1      420  vlan2   1152        link#10            UC          0        0  vlan3        link#11            UC          0        0  vlan4          UH          0        0    lo0
y.y.y.128/25    link#3             UC          0        0    em2
x.x.x.144/28 link#4             UC          0        0    em3
x.x.x.146    00:0c:29:b5:0e:bb  UHLW        1        6    lo0

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