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    All traffic going through VPN, even though option is off

    Scheduled Pinned Locked Moved OpenVPN
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator
      last edited by

      Still not very good design.

      What does the client have in their config... If server is not handing out that default route... Then its not possible for it to be setup by openvpn, unless the clients local config has it in there.

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.8, 24.11

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      • DerelictD
        Derelict LAYER 8 Netgate
        last edited by

        You should not enforce the ability to connect to things using routes. You should enforce it using firewall rules.

        Chattanooga, Tennessee, USA
        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
        Do Not Chat For Help! NO_WAN_EGRESS(TM)

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        • MMapplebeckM
          MMapplebeck
          last edited by

          This is all that goes into the config file:
          dev tun
          persist-tun
          persist-key
          cipher AES-256-CBC
          ncp-disable
          auth SHA256
          tls-client
          client
          resolv-retry infinite
          remote <remoteserver> 443 udp
          setenv opt block-outside-dns
          lport 0
          auth-user-pass
          ca vpn-UDP4-443-ca.crt
          tls-auth vpn-UDP4-443-tls.key 1
          remote-cert-tls server

          In an ideal world, everyone, everywhere would use the same local network, so that we never have this type of problem, however, I know for a fact our local ISP, some CPE has 192.168.1.0/24 as a local network, while other CPE of theirs uses 192.168.2.0/24, and some even use 192.168.10.0/24. Another regional ISP uses 10.x.y.0/24 where the second and third octets are random numbers. Whether I tell the tunnel to pass ALL RCF1918 traffic, or the 20 so subnets we have for various dev environments/ isolated services etc, the same issue with potential overlap exists where local subnet will always take precedence over the VPN.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by johnpoz

            My point to being a bad design.. Is your stepping on any other local networks they might need to get to because your tunnel network would take precedence over just their default route that would allow them to go to their other local networks.

            Its one thing if you "happen" overlap - its another to say ALL rfc1918 come to me.

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.8, 24.11

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            • MMapplebeckM
              MMapplebeck
              last edited by

              That's the same effect you get when you turn on the Route All IPv4 traffic option, it adds 2 routes:
              0.0.0.0/1 > VPN and 128.0.0.0/1 > VPN

              Instead, I just want 3 routes:
              10.0.0.0/8 > VPN, 172.16.0.0/12, and 192.168.0.0/16

              Which then force ALL traffic out as well. All I want to do is grab all RFC1918 destinations, and route them through the tunnel, not forcing public internet bound traffic through the tunnel.

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              • johnpozJ
                johnpoz LAYER 8 Global Moderator
                last edited by

                Which is all bad design ;) I never have that option on.. Unless It was for some mobile device like a phone and some hotspot, etc. And yeah it stops them from split tunnel to any other networks that might be local to them with them having to create the routes, etc.

                So your saying those routes go away when you disconnect from the vpn?

                Here the thing - clearly openvpn server is NOT handing those routes out.. You can see from the connection log... Its not in the local clients config from what you shown..

                So where and the F is coming from?

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
                SG-4860 24.11 | Lab VMs 2.8, 24.11

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                • F
                  fiddlybytes @MMapplebeck
                  last edited by fiddlybytes

                  edited ;

                  Basically new ordered nat rules and new ordered fw rules to force the gateways for the rfc and non-tunnel clients.

                  On the wan adapter in the nat window config area you can then select lan aliases of the road warriors as a new nat rules via the gateway you want them to exit on.
                  These nat rules would precede the nat rules for the tunnel clients.

                  Add firewall rules for road warrior subnet clients above the tunnel subnet clients,with each i.e "http rule" specifying the non-vpn gateway.

                  I think someone else mentioned this type of setup.

                  hth :)

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                  • johnpozJ
                    johnpoz LAYER 8 Global Moderator
                    last edited by johnpoz

                    If you require two nat scenarios on the same lan/wan (vpn) it doesnt work on pfsense very well without scripts

                    WHAT??

                    An intelligent man is sometimes forced to be drunk to spend time with his fools
                    If you get confused: Listen to the Music Play
                    Please don't Chat/PM me for help, unless mod related
                    SG-4860 24.11 | Lab VMs 2.8, 24.11

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                    • DerelictD
                      Derelict LAYER 8 Netgate
                      last edited by

                      @m8ee said in All traffic going through VPN, even though option is off:

                      If you require two nat scenarios on the same lan/wan (vpn) it doesnt work on pfsense very well without scripts as the vpn fallback is the gateway you dont want the specified traffic to route through the bonded gateway but it will,which is what appears to be happening.

                      Search for NO_WAN_EGRESS and simply block the traffic you want to only go out the VPN if it tries to go out the clear WAN.

                      Chattanooga, Tennessee, USA
                      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                      Do Not Chat For Help! NO_WAN_EGRESS(TM)

                      F 1 Reply Last reply Reply Quote 0
                      • F
                        fiddlybytes @Derelict
                        last edited by

                        Yes i know ,i was talking about my own extra wan adapter,was wrong there,it does vpn and allow non vpn traffic on the same adapter,its not linux...:)

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