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    2 Networks, 2 Gateways, same Router. Routing Question

    Routing and Multi WAN
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    • L
      LeiShen
      last edited by

      I tried this in my dnsmasq.d config file on the 172.27.3.3 gateway, but it doesn't seem to help:

      rev-server=172.27.2.0/24,172.27.2.1
      
      1 Reply Last reply Reply Quote 0
      • RicoR
        Rico LAYER 8 Rebel Alliance
        last edited by Rico

        In Linux it should be someting like
        ip route add 172.27.2.0/24 via 172.27.3.1 dev eth0
        Maybe you need to enable IP forwarding
        echo 1 > /proc/sys/net/ipv4/ip_forward
        But I'm no Raspi guy, maybe those commands need some adjustment.

        -Rico

        L 1 Reply Last reply Reply Quote 0
        • L
          LeiShen @Rico
          last edited by

          @Rico : ip forwarding is turned on.
          When I entered your 'ip route' command, I got this:

          root@wormhole:/home/pi# ip route add 172.27.2.0/24 via 172.27.3.1 dev eth0
          RTNETLINK answers: File exists
          
          

          So, it looks like that's already in there. But still no joy.

          1 Reply Last reply Reply Quote 0
          • RicoR
            Rico LAYER 8 Rebel Alliance
            last edited by

            What is the output of ip route?

            -Rico

            L 1 Reply Last reply Reply Quote 0
            • L
              LeiShen @Rico
              last edited by

              @Rico : Lots of stuff!

              root@wormhole:/etc/dnsmasq.d# ip route
              0.0.0.0/1 via 10.8.0.5 dev tun0
              default via 172.27.3.1 dev eth0  metric 202
              10.8.0.0/24 via 10.8.0.5 dev tun0
              10.8.0.1 via 10.8.0.5 dev tun0
              10.8.0.5 dev tun0  proto kernel  scope link  src 10.8.0.6
              10.10.0.0/24 via 10.10.0.5 dev tun2
              10.10.0.1 via 10.10.0.5 dev tun2
              10.10.0.5 dev tun2  proto kernel  scope link  src 10.10.0.6
              47.149.29.80 via 172.27.3.1 dev eth0
              127.0.0.1 via 172.27.3.1 dev eth0
              128.0.0.0/1 via 10.8.0.5 dev tun0
              136.32.128.65 via 172.27.3.1 dev eth0
              136.61.208.161 via 172.27.3.1 dev eth0
              139.178.68.38 via 172.27.3.1 dev eth0
              139.178.82.59 via 172.27.3.1 dev eth0
              172.27.2.0/24 via 172.27.3.1 dev eth0
              172.27.3.0/24 dev eth0  proto kernel  scope link  src 172.27.3.3  metric 202
              
              
              1 Reply Last reply Reply Quote 0
              • RicoR
                Rico LAYER 8 Rebel Alliance
                last edited by

                That looks Okay to me, but routing is still asynchronous.
                You can either add routes to your endpoints in the 172.27.3.0/24 network or tell pfSense to use 172.27.3.3 as Gateway for 172.27.3.0/24. Check https://docs.netgate.com/pfsense/en/latest/book/routing/static-routes.html

                -Rico

                L 1 Reply Last reply Reply Quote 1
                • RicoR
                  Rico LAYER 8 Rebel Alliance
                  last edited by

                  Probably the best and clean solution would be to get rid of the Raspi and use pfSense as your VPN Client.
                  Check out https://www.netgate.com/resources/videos/openvpn-as-a-wan-on-pfsense.html

                  -Rico

                  1 Reply Last reply Reply Quote 1
                  • L
                    LeiShen @Rico
                    last edited by

                    @Rico
                    Ok, so I already had 172.27.3.3 set up as a gateway for the 172.27.3.x Interface.

                    Not sure how to add a route to an endpoint in the 172.27.3.0/24 network, but I'll dig around for how to do that on those devices I need to access from 172.27.2.x

                    Thanks!

                    1 Reply Last reply Reply Quote 0
                    • L
                      LeiShen
                      last edited by LeiShen

                      I'm still dead.
                      Can't figure out how to set a static route on hassio or a tasmota device.
                      And I know my

                      172.27.2.0/24 via 172.27.3.1 dev eth0
                      

                      works, because if I remove that route, then I can't get to anything on the 2.x network from the 3.x network. But I'm still unable to access anything on the 3.x network from the 2.x network.

                      I'll jump over the the OpenVPN forum and see if they can help. But if anyone has any further ideas, please let me know.

                      Thanks @Rico !!

                      1 Reply Last reply Reply Quote 0
                      • L
                        LeiShen
                        last edited by

                        Here's a tracert from the 172.27.2.x network (my PC) to a device on the 172.27.3.x network (my Home Assistant Server):

                        C:\Users\DaHai>tracert hassio.asgard
                        
                        Tracing route to hassio.asgard [172.27.3.4]
                        over a maximum of 30 hops:
                        
                          1     1 ms     1 ms     1 ms  bifrost.asgard [172.27.2.1]
                          2     2 ms     2 ms     1 ms  hassio.asgard [172.27.3.4]
                        
                        Trace complete.
                        

                        It routes and complete pretty much instantly, but I can't bring its web page up in my browser.
                        I get "The site can't be reached"

                        This is the same with any other device on the 3.x network when I try to access it via its web page from the 2.x network.

                        1 Reply Last reply Reply Quote 0
                        • L
                          LeiShen
                          last edited by

                          Maybe the iptables.up.rules is set up wrong on the OpenVPN RPI3B+ device?

                          # Generated by iptables-save v1.4.21 on Tue Nov 29 15:32:04 2016
                          *nat
                          :PREROUTING ACCEPT [0:0]
                          :INPUT ACCEPT [0:0]
                          :OUTPUT ACCEPT [25:1612]
                          :POSTROUTING ACCEPT [25:1612]
                          -A POSTROUTING -o tun0 -j MASQUERADE
                          -A POSTROUTING -o tun1 -j MASQUERADE
                          -A POSTROUTING -o tun2 -j MASQUERADE
                          -A POSTROUTING -o eth0 -j MASQUERADE
                          COMMIT
                          # Completed on Tue Nov 29 15:32:04 2016
                          
                          1 Reply Last reply Reply Quote 0
                          • L
                            LeiShen
                            last edited by

                            @LeiShen said in 2 Networks, 2 Gateways, same Router. Routing Question:

                            -A POSTROUTING -o eth0 -j MASQUERADE

                            Well, it looks like that was the problem. I don't know why it was in there. I don't know what taking it out might break, but now I can get to 3.x devices from the 2.x network!

                            I'll have to look through my notes to see why it was put in there to begin with...

                            Cheers!

                            1 Reply Last reply Reply Quote 0
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