NAT over IPSEC

armeniki

Hi everyone,

I've got a problem which I have spent hours trying to figure out but have been unsuccessful. I hope someone is able to point me in the right direction.

So here it goes… :)

I have two pfSense boxes connected to each other over an IPSEC link, one is at Site A and the other is at Site B, with the following addresses:

SITE A
WAN IP: 50.xxx.xxx.122
LAN: 192.168.2.0/24

SITE B
WAN IP: 260.xxx.xxx.77
LAN: 192.168.1.0/29

The IPSEC link between both sites works fine and I am able to access the LANs from either site. In other words, when I am at Site A I can access everything on 192.168.1.0/29 and when I am at Site B I can access everything on 192.168.2.0/24 .

So, here is my problem:

I need to be able to get to a machine with LAN IP 192.168.1.4 port 8080 at Site B from the Internet but from Site A's WAN IP.

What I have done so far, which has obviously not worked is this:

At Site A, I have created a firewall rule on the WAN interface which allows traffic to 192.168.1.4 port 8080.
At Site A, I have created a NAT rule that forwards traffic from the WAN interface to 192.168.1.4 port 8080.

When I browse to 50.xxx.xxx.122:8080, I don't get connected to 192.168.1.4 at Site B and just get a timeout message.

Thank you in advance.
Armen

kholmqvist

Hi,

It's not possible. You can see why here https://forum.pfsense.org/index.php?topic=53776.0

armeniki

Hi kholmqvist,

Thanks for your message.

I did indeed see that post a few days ago and I was afraid it was going to be the same for me! :-\

Maybe my situation is a bit different than that of the gentleman in that post? I'm just thinking "out loud" here but..

The device which will access from the WAN side will have a known IP address (or a couple from a known pool/subnet) so it won't be 0.0.0.0/0
The port will always be 8080

So with these two differences I am hoping I can make it work.

Again, I could be wrong but I will try and experiment a little with the Phase2 settings and some NAT settings.

Here's hoping!

Derelict

You will need phase 2 entries for the "known pool/subnet" between the two sites. Site B will then only be able to access the "known pool/subnet" over IPsec. It will not be able to access it over the internet.

I just built this and it seems to work. Only tested a port-forwarded ping.

Or use OpenVPN. It excels at this. All of the talk in that thread about assigned interfaces and reply-to is done and works great.

armeniki

Hi Derelict,

Thanks for chiming in.

Yes, I was experimenting with the Phase2 settings and was able to make things work! :)

Thanks again everyone for your thoughts and suggestions.

pfSense rocks!

Cheers,
Armen