ipf/ipnat NAT/port forward issues

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# 1  
Old 11-21-2011
ipf/ipnat NAT/port forward issues

I've been going crazy trying to get this working. Here's the situation: we have a Solaris 10 box that connects an internal network to an external network. We're using ipf/ipnat on it. We've added a couple of new boxes to the internal network (, .101) and want to be able to get to port 80 on them from the external network (say, at ports 81 and 82). We'd also like to allow the internal boxes to get to the rest of the world using NAT. ipf/ipnat seems like it can do this.

Here's an ifconfig -a from the Solaris box:
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet netmask ff000000
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet netmask ffffff00 broadcast
        ether 8:0:27:b6:64:40
e1000g1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
        inet netmask ffffff00 broadcast
        ether 8:0:27:24:f0:95
e1000g2: flags=1004843<UP,BROADCAST,RUNNING,MULTICAST,DHCP,IPv4> mtu 1500 index 4
        inet netmask ffffff00 broadcast
        ether 8:0:27:90:3c:a

e1000g0 is connected to the external network. e1000g1 is connected to the internal network. e1000g2 is connected to the Internet.

I've got these rules in ipnat.conf:
map e1000g1 -> 0/32 portmap tcp/udp 10000:20000
map e1000g1 -> 0/32
rdr e1000g1 port 81 -> port 80

ipf.conf is configured to allow all traffic.

Network connectivity is solid. Everything is connected the way it's supposed to be and I can get to everything from everywhere I'd expect to be able to.

Here's the problem: my maps and rdrs don't work. I can try to do something that gets me to the outside from the internal box ( and I get this in ipnat -l, but the connection doesn't actually work:
List of active MAP/Redirect filters:
map e1000g1 -> portmap tcp/udp 10000:20000
map e1000g1 ->
rdr e1000g1 port 81 -> port 80 tcp

List of active sessions:
MAP     <- ->     []

If I try to get to from the external network, though, I get no new "active sessions" entry from ipnat -l (and obviously the page doesn't load).

Any thoughts as to what I'm doing wrong here? Hopefully it's something stupid I've just overlooked. I've spent way more time on this than I'd hoped to when I started. I've tried any number of variations and have Googled extensively to no avail.

Any help is appreciated.
# 2  
Old 02-13-2012
That has nothing to do with ipf nor ipnat, and you're talking about Linux, not Solaris. You should start a new thread.

Last edited by jim mcnamara; 02-13-2012 at 06:20 PM.. Reason: post removed
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