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    Unable to connect to WAN when connecting from Client to OpenVPN server.

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    • I
      ianh
      last edited by

      Hello,

      I am very new to pfsense firewall and OpenVPN and doing my best to set up a solution where we can log in to the OpenVPN server get allocated an IP to then be able to log in remotely to managed servers etc for Management Purposes such as ssh to a webserver from a fixed IP range etc.

      Current issue is that when logged in via the client no traffic seems to get rooted back through the VPN tunnel even though the Force all clients option is set.

      I have noticed that when connected (windows 10 pro os) I am not assigned any Gateway:

      Unknown adapter OpenVPN TAP-Windows6:

      Connection-specific DNS Suffix . : xxxxxxx
      Description . . . . . . . . . . . : TAP-Windows Adapter V9
      Physical Address. . . . . . . . . : xxxxxxxxxxxxxxxxx
      DHCP Enabled. . . . . . . . . . . : Yes
      Autoconfiguration Enabled . . . . : Yes

      IPv4 Address. . . . . . . . . . . : 123.45.5.2(Preferred)
      Subnet Mask . . . . . . . . . . . : 255.255.255.0
      Lease Obtained. . . . . . . . . . : 24 December 2020 13:20:18
      Lease Expires . . . . . . . . . . : 24 December 2021 13:20:18
      Default Gateway . . . . . . . . . :
      DHCP Server . . . . . . . . . . . : 123.45.5.254

      Network Config on pfsense

      [2.4.5-RELEASE][root@Mercury.paac-it.com]/root: ifconfig
      vtnet0:
      inet <external IP> netmask 0xffffff00 broadcast <external IP>
      nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
      media: Ethernet 10Gbase-T <full-duplex>
      status: active
      lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
      options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
      inet6 ::1 prefixlen 128
      inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
      inet 127.0.0.1 netmask 0xff000000
      nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
      groups: lo

      vtnet0.1001: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 150 0
      options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
      ether 00:16:3e:81:51:b7
      inet6 fe80::216:3eff:fe81:51b7%vtnet0.1001 prefixlen 64 scopeid 0x6
      inet 123.45.1.1 netmask 0xffff0000 broadcast 123.45.255.255
      nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
      media: Ethernet 10Gbase-T <full-duplex>
      status: active
      vlan: 1001 vlanpcp: 0 parent interface: vtnet0
      groups: vlan
      ovpns1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
      options=80000<LINKSTATE>
      inet6 fe80::216:3eff:fe81:51b7%ovpns1 prefixlen 64 scopeid 0x7
      inet 123.45.5.1 --> 123.45.5.2 netmask 0xffffff00
      nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
      groups: tun openvpn
      Opened by PID 56860

      We have a simple setup with a pfsense firewall with one WAN adapter
      We have created a LAN with ip range 123.45.1.0/16
      We have created a VPN tunnel with 123.45.5.0/24

      I choose the 123 range due to this log entry:

      block anything from private networks on interfaces with the option set

      block in log quick on $LAN from 10.0.0.0/8 to any tracker 12000 label "Block private networks from LAN block 10/8"

      Originally we used the same as in the documentation explanation 10.3.201.0/24 for VPN and the Lan was in the 10.3.0.1/24

      However given that it seems that we have routing issues I thought I would try to help this allong by putting the VPN in the same subnet as the LAN - if my understanding is correct.
      The only thing we want to do with the OpenVPN is get clients to connect to this Server and then connect back out to the WAN using this tunnel we have no need for connection to Private LAN's etc.

      I have looked at the following options with regards to firewall rules:
      As for instance from the pfsense firewall I have no issues pinging 8.8.4.4 however from the client this is not possible and clearly it does not understand how to route its traffic there:

      I believe there is an error in how we have the routing setup between the OpenVPN and the pfsense firewall - just cannot identify where.

      ff617827-e7eb-4aa2-be2b-1544f21f687f-image.png

      d380228a-8271-44b0-a34e-533983c1811c-image.png

      52a1549d-efab-4f9d-b4bc-c1564f61c816-image.png

      So basically everything is open as far as I can see - no fancy or difficult rules.

      We have also added these persistent routes:

      2579744b-b299-448f-9f35-4868b71ca569-image.png

      This is the config File on the Client:

      dev tun
      persist-tun
      persist-key
      data-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC
      data-ciphers-fallback AES-256-CBC
      auth SHA1
      tls-client
      client
      resolv-retry infinite
      remote 95.154.192.200 1194 udp4
      verify-x509-name "mercury.xxxx name
      auth-user-pass
      pkcs12 Mercury-UDP4-1194-ian.harwood.p12
      tls-auth Mercury-UDP4-1194-ian.harwood-tls.key 1
      remote-cert-tls server

      This is the routes I get when I am connected:

      IPv4 Route Table

      Active Routes:
      Network Destination Netmask Gateway Interface Metric
      0.0.0.0 0.0.0.0 192.168.0.1 192.168.0.33 40
      0.0.0.0 128.0.0.0 123.45.5.1 123.45.5.2 281
      95.154.192.198 255.255.255.255 123.45.5.1 123.45.5.2 281
      <external ip> 255.255.255.255 192.168.0.1 192.168.0.33 296
      123.45.5.0 255.255.255.0 On-link 123.45.5.2 281
      123.45.5.2 255.255.255.255 On-link 123.45.5.2 281
      123.45.5.255 255.255.255.255 On-link 123.45.5.2 281
      127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
      127.0.0.1 255.255.255.255 On-link 127.0.0.1 331
      127.255.255.255 255.255.255.255 On-link 127.0.0.1 331
      128.0.0.0 128.0.0.0 123.45.5.1 123.45.5.2 281
      192.168.0.0 255.255.255.0 On-link 192.168.0.33 296
      192.168.0.33 255.255.255.255 On-link 192.168.0.33 296
      192.168.0.255 255.255.255.255 On-link 192.168.0.33 296
      224.0.0.0 240.0.0.0 On-link 127.0.0.1 331
      224.0.0.0 240.0.0.0 On-link 123.45.5.2 281
      224.0.0.0 240.0.0.0 On-link 192.168.0.33 296
      255.255.255.255 255.255.255.255 On-link 127.0.0.1 331
      255.255.255.255 255.255.255.255 On-link 123.45.5.2 281
      255.255.255.255 255.255.255.255 On-link 192.168.0.33 296

      From the Client when connected to VPN I can ping the LAN the LAN gateway the VPN Gateway and the External IP of the VPN server.

      Any other traffic is not reachable - so must be the way we have the internal routing set up and I am still stumped why we do not receive a "Gateway" configuration on the Client when connected to OpenVPN.

      If anyone can give me some pointers I would appreciate it as I have spent hours racking my brains and reading manuals -

      I have found mentions of these commands in various forums - however I would like to understand how you configure this properly instead of just adding this to config files, and not sure if this will address the issue I am having:

      *1. Redirect all the traffic into the tunnel

      The easiest solution - use OpenVPN's --redirect-gateway autolocal option (or put it in the config file as redirect-gateway autolocal.*

      However this option is configured in the OpenVPN Server Config.

      *a. Enable packet forwarding

      By default in most distributions the packet forwarding is disabled, hence packets from the tunnel interface never make it to the public interface. You must enable forwarding with:

      ~ # sysctl net.ipv4.ip_forward=1
      net.ipv4.ip_forward = 1*

      Not sure where to make this change and if its relevant, as we have done the config in the GUI so far.

      Also seen something about IPTABLES - but this is not a recognised command in the pfsense console, and I believe this is already enabled in a Firewall rules?

      ~ # iptables -I FORWARD -j ACCEPT

      we did receive advice from another forum - but this is configured allready:

      You need to go into the openVPN settings in pfSense and tell it to set the default gateway on clients.

      In the "Tunnel settings", there should be an option "redirect Gateway", this needs to be set, in order for the external traffic to be forced through the VPN tunnel.

      Any help greatly received.

      Tnx :)

      I V 3 Replies Last reply Reply Quote 0
      • I
        ianh @ianh
        last edited by

        This post is deleted!
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        • I
          ianh @ianh
          last edited by

          Just appended this Route as I noticed I had put in a wrong IP in the push command from the OpenVPN config. SO I can confirm that when I Push two routes to the Clients these are configured as so:

          IPv4 Route Table

          Active Routes:
          Network Destination Netmask Gateway Interface Metric
          0.0.0.0 0.0.0.0 192.168.0.1 192.168.0.33 45
          0.0.0.0 128.0.0.0 123.45.5.1 123.45.5.2 281
          95.154.192.198 255.255.255.255 123.45.5.1 123.45.5.2 281
          109.169.81.215 255.255.255.255 123.45.5.1 123.45.5.2 281

          So I think the problem we are having is how to route traffic from the VPN network with gateway 123.45.5.1 to the WAN.

          I am trying to work out where is the misconfig that is blocking this....

          1 Reply Last reply Reply Quote 0
          • noplanN
            noplan
            last edited by

            A) Your openVpn server is pfS?
            B) your client can connect via openVpn to the openVpn server on pfS?
            C) the connected clients get their ip dns etc?
            D) you run Splitt tunnel (DNS or not)
            E) connect to win machines (netBios) planned
            F) your NAT settings on pfS (hybrid???)
            G) your servers / you want to reach when dialed in via openVpn on LAN interface or on optX?

            Next steps after answer.
            BrNP

            I 1 Reply Last reply Reply Quote 0
            • V
              viragomann @ianh
              last edited by

              @ianh said in Unable to connect to WAN when connecting from Client to OpenVPN server.:

              We have a simple setup with a pfsense firewall with one WAN adapter
              We have created a LAN with ip range 123.45.1.0/16
              We have created a VPN tunnel with 123.45.5.0/24

              These networks are overlapping. So there is no routing possible between them.

              noplanN 1 Reply Last reply Reply Quote 0
              • noplanN
                noplan @viragomann
                last edited by

                @viragomann

                oh boy yes true i thougth this was just an example like 123456 then i stoped readin ;)

                ;) too much x-mas drinks ;)

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                • V
                  viragomann @noplan
                  last edited by

                  @noplan
                  So did I, cause public IP ranges should not be used for private networks. But even if its an example IP, it's a bad one. 😉

                  1 Reply Last reply Reply Quote 0
                  • I
                    ianh @noplan
                    last edited by

                    @noplan

                    Thanks for your comments so far - and point noted about my IP allocation - as this was testing I was not being so pedantic about it - but I have changed these now.

                    TO answer your questions:

                    A) Your openVpn server is pfS?
                    Yes 2.4.5-RELEASE-p1 (amd64)

                    B) your client can connect via openVpn to the openVpn server on pfS?
                    Yes they connect on Public IP to pfs

                    C) the connected clients get their ip dns etc?
                    The Connected Clients get the following config:

                    Connection-specific DNS Suffix . : paacvpn
                    Description . . . . . . . . . . . : TAP-Windows Adapter V9
                    Physical Address. . . . . . . . . : 00-FF-A2-C4-D3-E6
                    DHCP Enabled. . . . . . . . . . . : Yes
                    Autoconfiguration Enabled . . . . : Yes
                    Link-local IPv6 Address . . . . . : fe80::b05d:3a66:e901:c2f0%17(Preferred)
                    IPv4 Address. . . . . . . . . . . : 10.3.200.2(Preferred)
                    Subnet Mask . . . . . . . . . . . : 255.255.255.0
                    Lease Obtained. . . . . . . . . . : 26 December 2020 10:30:57
                    Lease Expires . . . . . . . . . . : 26 December 2021 10:30:57
                    Default Gateway . . . . . . . . . :
                    DHCP Server . . . . . . . . . . . : 10.3.200.254
                    DHCPv6 IAID . . . . . . . . . . . : 721485730
                    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-27-52-C3-D6-1C-1A-DF-B0-ED-33
                    DNS Servers . . . . . . . . . . . : 8.8.8.8
                    8.8.4.4
                    1.1.1.1
                    NetBIOS over Tcpip. . . . . . . . : Enabled

                    D) you run Splitt tunnel (DNS or not)
                    No everything is tunnelled selected in the GUI and this is the config on the client:
                    dev tun
                    persist-tun

                    E) connect to win machines (netBios) planned - elaborate on this question if you will?

                    F) your NAT settings on pfS (hybrid???)

                    Based on another article I found I did have Automatic but changed this to manual and then copied and added NAT rules for the WAN to use the OPT1 interface, as explained here: pfsense-with-expressvpn-openvpn

                    G) your servers / you want to reach when dialed in via openVpn on LAN interface or on optX?

                    We want to go back out to the WAN via the OPT1 interface.

                    I have changed the LAN to 10.3.0.0/24 and OPT1 10.3.201.0/24 - as it was before when it still was not working.

                    If you need any more info from me please let me know. I have shell access if you need me to run commands and show outputs etc.

                    Many Tnx!

                    V 1 Reply Last reply Reply Quote 0
                    • V
                      viragomann @ianh
                      last edited by

                      @ianh said in Unable to connect to WAN when connecting from Client to OpenVPN server.:

                      F) your NAT settings on pfS (hybrid???)
                      Based on another article I found I did have Automatic but changed this to manual and then copied and added NAT rules for the WAN to use the OPT1 interface, as explained here: pfsense-with-expressvpn-openvpn

                      ExpressVPN is a VPN provider. So that guide describes the setup to connect to a VPN provider and route the upstream traffic to it. That is not what you want.
                      In your case you do the part of the vpn provider for clients that connect to your server. So you have to route out their upstream traffic to the WAN gateway.

                      So you need an outbound NAT rule for the source range of the vpn tunnel network on the WAN interface.

                      If that does not work, again show your setup configuration. After you've obviously changed several things already:
                      OpenVPN server settings
                      interface settings
                      firewall rules
                      outbound NAT rules

                      I 3 Replies Last reply Reply Quote 0
                      • I
                        ianh @viragomann
                        last edited by

                        @viragomann

                        Yes definitely made some changes but still cannot get the basic config to work.

                        Just to check what I am trying to do should be plausible right?

                        Use the OpenVPN to tunnel all traffic through it for management purposes?

                        Current set up is as follows I have managed to pull the information from the shell as I figure it might be easier than looking at screenshots.. if you want me to add screenshots I will:

                        Open VPN server settings are as follows:

                        dev ovpns1
                        verb 3
                        dev-type tun
                        dev-node /dev/tun1
                        writepid /var/run/openvpn_server1.pid
                        #user nobody
                        #group nobody
                        script-security 3
                        daemon
                        keepalive 10 60
                        ping-timer-rem
                        persist-tun
                        persist-key
                        proto udp4
                        cipher AES-256-CBC
                        auth SHA1
                        up /usr/local/sbin/ovpn-linkup
                        down /usr/local/sbin/ovpn-linkdown
                        client-connect /usr/local/sbin/openvpn.attributes.sh
                        client-disconnect /usr/local/sbin/openvpn.attributes.sh
                        local pfsense IP
                        tls-server
                        server 10.3.200.0 255.255.255.0
                        client-config-dir /var/etc/openvpn-csc/server1
                        username-as-common-name
                        plugin /usr/local/lib/openvpn/plugins/openvpn-plugin-auth-script.so /usr/local/sbin/ovpn_auth_verify_async user TG9jYWwgRGF0YWJhc2U= false server1 1194
                        tls-verify "/usr/local/sbin/ovpn_auth_verify tls 'xxxxxxxxx' 1"
                        lport 1194
                        management /var/etc/openvpn/server1.sock unix
                        push "dhcp-option DOMAIN paacvpn"
                        push "dhcp-option DNS 8.8.8.8"
                        push "dhcp-option DNS 8.8.4.4"
                        push "dhcp-option DNS 1.1.1.1"
                        push "redirect-gateway def1"
                        ca /var/etc/openvpn/server1.ca
                        cert /var/etc/openvpn/server1.cert
                        key /var/etc/openvpn/server1.key
                        dh /etc/dh-parameters.2048
                        tls-auth /var/etc/openvpn/server1.tls-auth 0
                        ncp-disable
                        persist-remote-ip
                        float
                        topology subnet
                        push "route x.x.x.215 255.255.255.255"

                        push "route x.x.x.198 255.255.255.255"

                        The x.x.x is just not to reveal the public IP of the routes I am pushing.

                        V 1 Reply Last reply Reply Quote 0
                        • I
                          ianh @viragomann
                          last edited by

                          @viragomann

                          interface settings:
                          interface settings:

                          vtnet0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
                          options=6d00bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWFILTER,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
                          ether 00:16:3e:81:51:b7
                          hwaddr 00:16:3e:81:51:b7
                          inet6 x:❌x❌x%vtnet0 prefixlen 64 scopeid 0x1
                          inet x.x.x.x netmask 0xffffff00 broadcast x.x.x.255
                          nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                          media: Ethernet 10Gbase-T <full-duplex>
                          status: active
                          lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
                          options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
                          inet6 ::1 prefixlen 128
                          inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
                          inet 127.0.0.1 netmask 0xff000000
                          nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                          groups: lo
                          enc0: flags=0<> metric 0 mtu 1536
                          nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                          groups: enc
                          pfsync0: flags=0<> metric 0 mtu 1500
                          groups: pfsync
                          pflog0: flags=100<PROMISC> metric 0 mtu 33160
                          groups: pflog
                          vtnet0.1001: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
                          options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
                          ether 00:16:3e:81:51:b7
                          inet6 fe80::216:3eff:fe81:51b7%vtnet0.1001 prefixlen 64 scopeid 0x6
                          inet 10.3.0.1 netmask 0xffffff00 broadcast 10.3.0.255
                          nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                          media: Ethernet 10Gbase-T <full-duplex>
                          status: active
                          vlan: 1001 vlanpcp: 0 parent interface: vtnet0
                          groups: vlan
                          ovpns1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
                          options=80000<LINKSTATE>
                          inet6 fe80::216:3eff:fe81:51b7%ovpns1 prefixlen 64 scopeid 0x7
                          inet 10.3.200.1 --> 10.3.200.2 netmask 0xffffff00
                          nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                          groups: tun openvpn
                          Opened by PID 85977

                          1 Reply Last reply Reply Quote 0
                          • I
                            ianh @viragomann
                            last edited by

                            @viragomann
                            Firewall and NAT rules

                            /var/etc/openvpn: cat /tmp/rules.debug

                            loopback = "{ lo0 }"
                            WAN = "{ vtnet0 }"
                            LAN = "{ vtnet0.1001 }"
                            OPT1 = "{ ovpns1 }"
                            OpenVPN = "{ openvpn }"

                            User Aliases

                            Gateways

                            GWGW_WAN = " route-to ( vtnet0 95.154.192.1 ) "
                            GWOPT1_VPNV4 = " route-to ( ovpns1 10.3.200.1 ) "

                            set loginterface vtnet0.1001

                            set skip on pfsync0

                            scrub on $WAN all fragment reassemble
                            scrub on $LAN all fragment reassemble
                            scrub on $OPT1 all fragment reassemble

                            no nat proto carp
                            no rdr proto carp
                            nat-anchor "natearly/"
                            nat-anchor "natrules/                            "

                            Outbound NAT rules (manual)

                            nat on $WAN inet from 127.0.0.0/8 to any port 500 -> pfsense IP static-port # Auto created rule for ISAKMP - localhost to WAN
                            nat on $OPT1 inet from 127.0.0.0/8 to any port 500 -> 10.3.200.1/32 static-port # Auto created rule for ISAKMP - localhost to WAN
                            nat on $WAN inet from 127.0.0.0/8 to any -> pfsense IP port 1024:65535 # Auto created rule - localhost to WAN
                            nat on $OPT1 inet from 127.0.0.0/8 to any -> 10.3.200.1/32 port 1024:65535 # Auto created rule - localhost to WAN
                            nat on $WAN inet6 from ::1/128 to any port 500 -> (vtnet0) static-port # Auto created rule for ISAKMP - localhost to WAN
                            nat on $OPT1 inet6 from ::1/128 to any port 500 -> (ovpns1) static-port # Auto created rule for ISAKMP - localhost to WAN
                            nat on $WAN inet6 from ::1/128 to any -> (vtnet0) port 1024:65535 # Auto created rule - localhost to WAN
                            nat on $OPT1 inet6 from ::1/128 to any -> (ovpns1) port 1024:65535 # Auto created rule - localhost to WAN
                            nat on $WAN inet from 10.3.0.0/24 to any port 500 -> pfsense IP static-port # Auto created rule for ISAKMP - LAN to WAN
                            nat on $OPT1 inet from 10.3.0.0/24 to any port 500 -> 10.3.200.1/32 static-port # Auto created rule for ISAKMP - LAN to WAN
                            nat on $WAN inet from 10.3.0.0/24 to any -> pfsense IP port 1024:65535 # Auto created rule - LAN to WAN
                            nat on $OPT1 inet from 10.3.0.0/24 to any -> 10.3.200.1/32 port 1024:65535 # Auto created rule - LAN to WAN
                            nat on $WAN inet from 10.3.200.0/24 to any port 500 -> pfsense IP static-port # Auto created rule for ISAKMP - OpenVPN server to WAN
                            nat on $OPT1 inet from 10.3.200.0/24 to any port 500 -> 10.3.200.1/32 static-port # Auto created rule for ISAKMP - OpenVPN server to WAN
                            nat on $WAN inet from 10.3.200.0/24 to any -> pfsense IP port 1024:65535 # Auto created rule - OpenVPN server to WAN
                            nat on $OPT1 inet from 10.3.200.0/24 to any -> 10.3.200.1/32 port 1024:65535 # Auto created rule - OpenVPN server to WAN

                            Load balancing anchor

                            rdr-anchor "relayd/*"

                            TFTP proxy

                            rdr-anchor "tftp-proxy/*"

                            NAT Inbound Redirects

                            rdr on openvpn proto { tcp udp } from 10.3.200.0/24 to 95.154.192.0/24 -> pfsense IP

                            UPnPd rdr anchor

                            rdr-anchor "miniupnpd"

                            anchor "relayd/"
                            anchor "openvpn/                            "
                            anchor "ipsec/*"

                            If you need anything else let me know.

                            Much appreciated.

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                            • V
                              viragomann @ianh
                              last edited by

                              @ianh said in Unable to connect to WAN when connecting from Client to OpenVPN server.:

                              Yes definitely made some changes but still cannot get the basic config to work.

                              So what is the concrete problem now?

                              Just to check what I am trying to do should be plausible right?
                              Use the OpenVPN to tunnel all traffic through it for management purposes?

                              Not really clear, what you try to achieve. Once you write "route the whole client traffic over the vpn", then "for management purposes"(?).
                              Also in the config you have both settings, "push redirect gateway" and also "push special networks (IPs)". (?)

                              Current set up is as follows I have managed to pull the information from the shell as I figure it might be easier than looking at screenshots.

                              Since pfSense is configured via the web configurator, we are rather familiar with screenshots.

                              I 1 Reply Last reply Reply Quote 0
                              • I
                                ianh @viragomann
                                last edited by

                                @viragomann

                                What I am trying to achieve is to use the VPN client on a Windows laptop (OS windows 10) to connect to the OpenVPN server which is running on a pfsense firewall version 2.4.5.

                                Once connected to the OpenVPN server I want the client to redirect all connections to the WAN through the OpenVPN server.

                                So far the Client can connect is given an IP from the OpenVPN server but is unable to connect to the internet.

                                There are two things I find odd when I connect with the client I am not given a default gateway in the IPconfig on the client for the VPNtunnel - possibly this is expected behaviour or not?

                                And no traffic is routed back through the Tunnel

                                Configuration from the GUI is as follows:

                                cd6d3f47-2f6e-4c29-82b7-402cefb9452c-image.png

                                8b26a98f-245d-4e1b-b1a2-cb2818ecef5f-image.png

                                8d83ba7b-aba5-4c5a-9331-6e2c5424008f-image.png

                                e30334e3-6af6-49e8-aaa0-b9c34cc49f02-image.png

                                90d8f7b6-4349-40b3-ad5c-09ee99902af1-image.png

                                dfbeaa8a-c1ab-456c-b2e3-26e84face804-image.png

                                OpenVPN config

                                369c8ea8-600e-4c8e-b3f0-42de76bc816a-image.png

                                b7773fb2-e5b3-4a24-b908-23787145d593-image.png

                                4c7a9378-57ed-4b15-a318-54aef3acbd07-image.png

                                4deb2010-14e0-4cca-977c-309a61e21524-image.png

                                a375a8b0-d28f-43b4-946b-906a1be9ced0-image.png

                                I think that should show the way it is configured... I am no doubt sure that there is something wrong with the config - yet this has never worked.

                                There has never been any issues connecting with the clients to the OpenVPN server.

                                It is how the traffic is routed, or the lack of routing once the client is attached to the Tunnel. The rules I pushed was to try to give the client a helping hand...possibly not a good choice...

                                If you can see any potential misconfiguration which is causing the traffic not to route properly would be appreciated.

                                Many Tnx.

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                                  viragomann @ianh
                                  last edited by

                                  @ianh said in Unable to connect to WAN when connecting from Client to OpenVPN server.:

                                  There are two things I find odd when I connect with the client I am not given a default gateway in the IPconfig on the client for the VPNtunnel - possibly this is expected behaviour or not?

                                  Yes, that is as expected. OpenVPN does not set a real default gateway, instead it adds two routes for 0.0.0.0/1 and 128.0.0.0/1, which also covers the whole IPv4 range.

                                  Your firewall rule on OPT1 only allows TCP traffic. You will also need UDP for DNS resolution.
                                  You did not show the OpenVPN rule tab. So subject to that the rule on OPT1 should be the only real showstopper as far as I can see.

                                  However, there are some additional miss-configurations in your setup:

                                  The outbound NAT rules on OPT1 are useless, since you don't need connections to go out this interface. You only have incoming connections there.

                                  Furthermore, also OPT1 by itself is not needed in your setup, but should not be a drawback if you have it.
                                  Consider, if you remove it, to move the firewall rules to OpenVPN tab.

                                  The port forwarding on OpenVPN seems useless for me and won't work anyway. No idea what you want to achieve with that.

                                  The gateway option in the rule on OPT1 is also not necessary, since WAN GW is presumably the default gateway anyway.

                                  OpenVPN server:
                                  The domain name you provided as default domain is really your local domain?

                                  As already mentioned, the push route options you entered in the advanced options are unnecessary, since the server pushes already the default route. Possibly that's an obstruction actually.

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                                    ianh @viragomann
                                    last edited by

                                    @viragomann

                                    Tnx for the suggestions I have removed all the unnecessary NAT rules for OPT1 and as suggested even removed this interface.

                                    I have removed the routes I was pushing in the advanced config on OpenVPN

                                    And here are the rules on the OpenVPN tab also changed to allow both UDP and TCP

                                    e181a4b3-99ba-44e9-b165-6dcc75cf9b02-image.png

                                    2ea012db-3b58-4899-9823-1ced9144ee02-image.png

                                    0687ad19-d82a-4003-9881-164a068e15a8-image.png

                                    As far as I can see it is wide open so I don't understand why this would not be allowing traffic.

                                    To me it looks wide open and we will have to close things down - but first we need the basics to work....

                                    d64751d6-6230-4207-90e9-0992a5b72f77-image.png

                                    641b1740-22c0-49d2-8665-4f1dd6f6e68e-image.png

                                    OpenVPN server:
                                    The domain name you provided as default domain is really your local domain?

                                    We have no local domain no servers on the LAN behind the pfsense we want to use this purely for the OpenVPN tunnel - so the LAN interface is pretty much redundant to us....

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                                      viragomann @ianh
                                      last edited by

                                      @ianh
                                      Is the outbound NAT rule for the OpenVPN tunnel network still in place?

                                      Does the client connect without issues? Something in the log on client or server?

                                      Show the clients routing table.

                                      Try to ping 8.8.8.8 from the client.

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                                        ianh @viragomann
                                        last edited by

                                        @viragomann

                                        This is the outbound rule for OpenVPN tunnel

                                        2f49f316-9e29-40a8-a9c1-e5d4e4e71797-image.png

                                        This is the log from the client the connection shows no errors and this is the routing table:

                                        2021-01-06 12:07:41 OpenVPN 2.5.0 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Oct 28 2020
                                        2021-01-06 12:07:41 Windows version 10.0 (Windows 10 or greater) 64bit
                                        2021-01-06 12:07:41 library versions: OpenSSL 1.1.1h 22 Sep 2020, LZO 2.10
                                        Enter Management Password:
                                        2021-01-06 12:07:48 TCP/UDP: Preserving recently used remote address: [AF_INET]95.154.192.200:1194
                                        2021-01-06 12:07:48 UDPv4 link local (bound): [AF_INET][undef]:1194
                                        2021-01-06 12:07:48 UDPv4 link remote: [AF_INET]95.154.192.200:1194
                                        2021-01-06 12:07:48 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
                                        2021-01-06 12:07:49 [mercury.paac-it.com] Peer Connection Initiated with [AF_INET]95.154.192.200:1194
                                        2021-01-06 12:07:50 open_tun
                                        2021-01-06 12:07:50 tap-windows6 device [OpenVPN TAP-Windows6] opened
                                        2021-01-06 12:07:50 Set TAP-Windows TUN subnet mode network/local/netmask = 10.3.200.0/10.3.200.2/255.255.255.0 [SUCCEEDED]
                                        2021-01-06 12:07:50 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.3.200.2/255.255.255.0 on interface {A2C4D3E6-3922-4706-8943-83589ECC4E95} [DHCP-serv: 10.3.200.254, lease-time: 31536000]
                                        2021-01-06 12:07:50 Successful ARP Flush on interface [17] {A2C4D3E6-3922-4706-8943-83589ECC4E95}
                                        2021-01-06 12:07:50 IPv4 MTU set to 1500 on interface 17 using service
                                        2021-01-06 12:07:55 Initialization Sequence Completed

                                        C:\Users\IanHarwood>route print

                                        Interface List
                                        7...1c 1a df b0 ed 33 ......Surface Ethernet Adapter
                                        5...........................Wintun Userspace Tunnel
                                        17...00 ff a2 c4 d3 e6 ......TAP-Windows Adapter V9
                                        19...04 33 c2 10 6e 91 ......Microsoft Wi-Fi Direct Virtual Adapter
                                        9...06 33 c2 10 6e 90 ......Microsoft Wi-Fi Direct Virtual Adapter #2
                                        10...04 33 c2 10 6e 90 ......Intel(R) Wi-Fi 6 AX201 160MHz
                                        1...........................Software Loopback Interface 1

                                        IPv4 Route Table

                                        Active Routes:
                                        Network Destination Netmask Gateway Interface Metric
                                        0.0.0.0 0.0.0.0 192.168.0.1 192.168.0.33 45
                                        0.0.0.0 128.0.0.0 10.3.200.1 10.3.200.2 281
                                        10.3.200.0 255.255.255.0 On-link 10.3.200.2 281
                                        10.3.200.2 255.255.255.255 On-link 10.3.200.2 281
                                        10.3.200.255 255.255.255.255 On-link 10.3.200.2 281
                                        95.154.192.200 255.255.255.255 192.168.0.1 192.168.0.33 301
                                        127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
                                        127.0.0.1 255.255.255.255 On-link 127.0.0.1 331
                                        127.255.255.255 255.255.255.255 On-link 127.0.0.1 331
                                        128.0.0.0 128.0.0.0 10.3.200.1 10.3.200.2 281
                                        192.168.0.0 255.255.255.0 On-link 192.168.0.33 301
                                        192.168.0.33 255.255.255.255 On-link 192.168.0.33 301
                                        192.168.0.255 255.255.255.255 On-link 192.168.0.33 301
                                        224.0.0.0 240.0.0.0 On-link 127.0.0.1 331
                                        224.0.0.0 240.0.0.0 On-link 10.3.200.2 281
                                        224.0.0.0 240.0.0.0 On-link 192.168.0.33 301
                                        255.255.255.255 255.255.255.255 On-link 127.0.0.1 331
                                        255.255.255.255 255.255.255.255 On-link 10.3.200.2 281
                                        255.255.255.255 255.255.255.255 On-link 192.168.0.33 301

                                        Persistent Routes:
                                        None

                                        IPv6 Route Table

                                        Active Routes:
                                        If Metric Network Destination Gateway
                                        1 331 ::1/128 On-link
                                        17 281 fe80::/64 On-link
                                        10 301 fe80::/64 On-link
                                        17 281 fe80::b05d:3a66:e901:c2f0/128
                                        On-link
                                        10 301 fe80::bd3d:8014:35bb:a3c2/128
                                        On-link
                                        1 331 ff00::/8 On-link
                                        17 281 ff00::/8 On-link
                                        10 301 ff00::/8 On-link

                                        Persistent Routes:
                                        None

                                        C:\Users\IanHarwood>tracert 8.8.8.8

                                        Tracing route to dns.google [8.8.8.8]
                                        over a maximum of 30 hops:

                                        1 24 ms 21 ms 24 ms 10.3.200.1
                                        2 * * * Request timed out.
                                        3 * * * Request timed out.
                                        4 * * * Request timed out.
                                        5 * * * Request timed out.
                                        6 * * * Request timed out.
                                        7 ^C
                                        C:\Users\IanHarwood>

                                        There are many errors in the pfsense but it seems that these are generic errors and not related to my issue - based on previous searches in google etc...

                                        There were error(s) loading the rules: /tmp/rules.debug:143: unknown protocol udp4 - The line in question reads [143]: pass in quick on $WAN reply-to ( vtnet0 95.154.192.1 ) inet proto udp4 from any to 95.154.192.200 tracker 1608329661 keep state label "USER_RULE: OpenVPN Remote Technical Staff wizard"

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                                          ianh @viragomann
                                          last edited by

                                          @viragomann

                                          results from ping test

                                          C:\Users\IanHarwood>ping 8.8.8.8

                                          Pinging 8.8.8.8 with 32 bytes of data:
                                          Request timed out.
                                          Request timed out.
                                          Request timed out.
                                          Request timed out.

                                          Ping statistics for 8.8.8.8:
                                          Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

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                                            viragomann @ianh
                                            last edited by

                                            @ianh said in Unable to connect to WAN when connecting from Client to OpenVPN server.:

                                            This is the outbound rule for OpenVPN tunnel

                                            Dude, you need an outbound NAT rule for the source of the OpenVPN tunnel network on the WAN interface!
                                            I mentioned that already. Also that the outbound NAT on the VPN interface is useless in your case!

                                            Outbound NAT is to be set on interfaces where the traffic is going out!
                                            The vpn clients traffic is coming in on the OpenVPN interface and is going out on WAN. For getting responses back to the WAN IP, the source address in the outgoing packets has to be translated into the interface address. That is the job of the outbound NAT.

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