Two gateways, two subnets, one internet, subnet connectivity issue

marvosa · Feb 2, 2017, 2:53 PM

I kind of figured you might run into that error. I'm thinking something like this might work:

http://i.imgur.com/95ouWv4.jpg

I accidentally deleted my post with it originally.

jamesonp, the design is sound, but the interfaces on the transit network have to be on the same network. i.e. the OPT interfaces would need to be 172.16.0.1/30 and 172.16.0.2/30 then adjust the static routes accordingly.

Then when I go to change the WAN to static and assign it an IP of 192.168.1.254, I get the following error in pfsense: This IPv4 address conflicts with a Static Route.

I'm guessing you forgot to remove your old route sending 192.168.1.0/24 to 192.168.1.1? That would be the reason for the conflict.

Also, after doing some more research, if you use my suggestion, the inter-connectivity between the sites would work, but we would still need to use policy routing to get LAN 2 to the internet. Which is fine, but it's an extra step. In your specific case, all we really needed to do from the beginning is disable outbound NAT (Firewall -> NAT -> Outbound -> check Disable Outbound NAT) which turns PFsense into a routing only firewall and put an any/any rule on the interface connected to the bridge.

Another option is to disable both NAT and the firewall which turns PFsense into a routing only platform:
System -> Advanced -> Firewall & NAT -> check Disable all packet filtering

I apologize for missing these steps. This could've been a much shorter thread :)

Live4soccer7 · Feb 2, 2017, 4:04 PM

Thanks, I'll give it a shot today. Possibly this morning if I can find time before work. I'll post back.

Live4soccer7 · Feb 2, 2017, 4:39 PM

I tried the following as it seemed like the simplest test.

Another option is to disable both NAT and the firewall which turns PFsense into a routing only platform:
System -> Advanced -> Firewall & NAT -> check Disable all packet filtering

I have now deleted an firewall rules that I've created and same went for routing tables on the pfSense box. When I did the above, I lost internet connectivity AND access to the router on the other side of the wireless bridge. I still have a route on the DDWRT router to the pfsense gateway and 192.168.5.0 subnet. What am I missing as that seems like it should do the trick. I still had local access to the 192.168.5.0 clients though, that was good.

marvosa · Feb 2, 2017, 5:41 PM

You now need a default route @ LAN 2 pointing back to LAN 1 (192.168.1.1).

You also need to verify that the static route @ LAN 1 is pointed at the current IP configured @ LAN 2. (i.e. if the LAN 2 interface is 192.168.1.254, then the route should be destination 192.168.5.0/24 gateway 192.168.1.254)

Live4soccer7 · Feb 2, 2017, 5:47 PM

Ok, so I did this:

System -> Advanced -> Firewall & NAT -> check Disable all packet filtering

WAN was set to 192.168.1.254
Default Gateway on wan is set to: 192.168.1.1

Still nothing. I am on the 192.168.5.0 subnet doing all this and once I make those changes I can't access the internet. On LAN1 I have confirmed that I DO have the static route pointing at the WAN IP provided above.

Is there something that needs to be set on LAN2 pfsense box to tell the LAN on that box to communicate with the WAN since all NAT/Filtering is disabled?

marvosa · Feb 2, 2017, 5:57 PM

Check your routing table, what is the gateway of the default route? Diagnostics -> Routes. Post a screen shot if you can.

Live4soccer7 · Feb 2, 2017, 6:04 PM

I've been using .112 instead of .254 :) My static routes on LAN1 match this.

![route table.png](/public/imported_attachments/1/route table.png)
![route table.png_thumb](/public/imported_attachments/1/route table.png_thumb)

marvosa · Feb 2, 2017, 6:07 PM

Can you ping 192.168.1.1? Can you ping 8.8.8.8?

Live4soccer7 · Feb 2, 2017, 6:09 PM

I doubt it, but I'll change the configuration back right now and let you know.

Live4soccer7 · Feb 2, 2017, 6:11 PM

Ping on both was 100% failure.

marvosa · Feb 2, 2017, 6:16 PM

Can you post a network map of how things are currently connected?

Also, what default gateway are your clients using on the PC's?

What happens when you ping 192.168.1.1 from PFsense itself?

Live4soccer7 · Feb 2, 2017, 6:29 PM

What happens when you ping 192.168.1.1 from PFsense itself?

I'm checking now.

Please excuse my terrible drawing, but it is all there. Let me know if you need clarification.

marvosa · Feb 2, 2017, 6:33 PM

Where can I input commands in pfSense?

Either from the shell via ssh or by going to Diagnostics -> Ping

Live4soccer7 · Feb 2, 2017, 6:35 PM

Ping Results directly from pfSense. Looks good. That means something is still prohibiting a connection between the LAN and WAN on the pfsense box as I'm unable to ping from a client connected to the pfSense Subnet (192.168.5.0)

PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: icmp_seq=0 ttl=58 time=19.789 ms
64 bytes from 8.8.8.8: icmp_seq=1 ttl=58 time=19.992 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=58 time=18.517 ms

–- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 18.517/19.433/19.992/0.653 ms

PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=1.897 ms
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=3.034 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=2.398 ms

--- 192.168.1.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 1.897/2.443/3.034/0.465 ms

marvosa · Feb 2, 2017, 6:41 PM

Run a tracert on your laptop to 8.8.8.8 and post the results.

Live4soccer7 · Feb 2, 2017, 6:51 PM

Traceroute while I have internet access:

Traceroute has started…

traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 72 byte packets
1 192.168.5.1 (192.168.5.1) 2.032 ms 1.566 ms 3.057 ms
2 192.168.1.1 (192.168.1.1) 4.491 ms 2.755 ms 3.445 ms
3 * * *
4 WANISP.ptr.us.xo.net (WANISP) 13.697 ms 11.825 ms 15.092 ms
5 ge-0-0-2-spk-cr1.cet.com (198.202.27.65) 14.796 ms 12.241 ms 12.642 ms
6 te-1-1-sea-cr2.cet.com (198.202.26.2) 18.589 ms 20.696 ms 20.326 ms
7 six.sea01.google.com (206.81.80.17) 20.489 ms 20.139 ms 19.410 ms
8 108.170.245.113 (108.170.245.113) 20.336 ms 20.854 ms 20.953 ms
9 209.85.250.19 (209.85.250.19) 20.182 ms 20.219 ms 21.039 ms
10 google-public-dns-a.google.com (8.8.8.8) 19.162 ms 20.637 ms 20.258 ms

Let me run one when I turn NAT/Firewall off

traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 72 byte packets
1 192.168.5.1 (192.168.5.1) 1.249 ms 3.578 ms 1.490 ms
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *

marvosa · Feb 2, 2017, 6:59 PM

So, that traceroute shows you hitting the LAN 2 internal interface, then routed to LAN 1 and out to the internet.

So, what do you mean when you say "traceroute while I have internet access"?

ahh… I think I know what you mean now, so once you turn off the firewall and NATing.... you can't get past the local adapter. Which tells me there's an internal routing issue.

Live4soccer7 · Feb 2, 2017, 6:58 PM

Yes, that is correct. It hits the LAN interface on LAN2 and then dies on the spot.

Live4soccer7 · Feb 2, 2017, 7:28 PM

Do I need a static route between the LAN interface and the WAN?

Live4soccer7 · Feb 2, 2017, 10:16 PM

I can ping everything on LAN1 (192.168.1.0), however when I try to ping something on LAN2 I get something like this:

92 bytes from dd-wrt (192.168.1.1): Destination Host Unreachable
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
4 5 00 5400 4fc9 0 0000 3f 01 a41b 192.168.1.115 192.168.5.1

92 bytes from dd-wrt (192.168.1.1): Redirect Host(New addr: 192.168.1.254)
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
4 5 00 0054 f9f5 0 0000 3f 01 f9ee 192.168.1.115 192.168.5.1

I'm not sure what the .254 address is.