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    P2P VPN server can't reach client, but client can reach server

    Scheduled Pinned Locked Moved OpenVPN
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    • lifeboyL
      lifeboy @lifeboy
      last edited by

      @lifeboy The error "MULTI: bad source address from client [::], packet dropped" is probably because I disabled IPV6...

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

        @lifeboy
        Nothing to see regarding applying the CSO.
        However, the log obviously doesn't show the very first clients touch.

        Note that there are no regarding log entries at default verbosity level.

        Ensure that the common name in the CSO is matching that one in the user certificate or even the username, depending on the "Username as Common Name" option in the server settings.

        The error "MULTI: bad source address from client [::], packet dropped" is probably because I disabled IPV6...

        If you don't want it, don't let it pass to the server and set the server to listen on IPv4 only.

        lifeboyL 1 Reply Last reply Reply Quote 0
        • lifeboyL
          lifeboy @viragomann
          last edited by

          @viragomann I had increased the log verbosity to 4, but here is a more complete log of the setting up of the tunnel.

          Jan 23 19:21:21	openvpn	33612	JHB_backup/156.38.137.242:1194 MULTI: bad source address from client [::], packet dropped
Jan 23 19:21:21	openvpn	33612	JHB_backup/156.38.137.242:1194 Protocol options: explicit-exit-notify 1, protocol-flags cc-exit tls-ekm dyn-tls-crypt
Jan 23 19:21:21	openvpn	33612	JHB_backup/156.38.137.242:1194 Timers: ping 10, ping-restart 120
Jan 23 19:21:21	openvpn	33612	JHB_backup/156.38.137.242:1194 Data Channel: cipher 'AES-256-GCM', peer-id: 0
Jan 23 19:21:21	openvpn	33612	JHB_backup/156.38.137.242:1194 MULTI: bad source address from client [::], packet dropped
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 SENT CONTROL [JHB_backup]: 'PUSH_REPLY,route 192.168.131.0 255.255.255.0,route 192.168.161.0 255.255.255.0,route 192.168.111.0 255.255.255.0,route-gateway 10.0.111.1,topology subnet,ping 10,ping-restart 60,ifconfig 10.0.111.2 255.255.255.0,peer-id 0,cipher AES-256-GCM,protocol-flags cc-exit tls-ekm dyn-tls-crypt,tun-mtu 1500' (status=1)
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Incoming Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Outgoing Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Incoming dynamic tls-crypt: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Incoming dynamic tls-crypt: Cipher 'AES-256-CTR' initialized with 256 bit key
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Outgoing dynamic tls-crypt: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Outgoing dynamic tls-crypt: Cipher 'AES-256-CTR' initialized with 256 bit key
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 Data Channel MTU parms [ mss_fix:1400 max_frag:0 tun_mtu:1500 tun_max_mtu:1600 headroom:136 payload:1768 tailroom:562 ET:0 ]
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 MULTI: primary virtual IP for JHB_backup/156.38.137.242:1194: 10.0.111.2
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 MULTI: Learn: 10.0.111.2 -> JHB_backup/156.38.137.242:1194
Jan 23 19:21:20	openvpn	33612	JHB_backup/156.38.137.242:1194 MULTI_sva: pool returned IPv4=10.0.111.2, IPv6=(Not enabled)
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 [JHB_backup] Peer Connection Initiated with [AF_INET]156.38.137.242:1194
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Control Channel: TLSv1.3, cipher TLSv1.3 TLS_AES_256_GCM_SHA384, peer certificate: 2048 bit RSA, signature: RSA-SHA256
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 TLS: tls_multi_process: initial untrusted session promoted to trusted
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 TLS: move_session: dest=TM_ACTIVE src=TM_INITIAL reinit_src=1
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_COMP_STUBv2=1
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_COMP_STUB=1
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_LZO_STUB=1
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_PROTO=990
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_CIPHERS=AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305:AES-256-CBC
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_NCP=2
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_MTU=1600
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_TCPNL=1
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_PLAT=freebsd
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 peer info: IV_VER=2.6.8
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY OK: depth=0, CN=JHB_backup, C=ZA, L=Cape Town, O=GTS Fastnet Connect
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY SCRIPT OK: depth=0, CN=JHB_backup, C=ZA, L=Cape Town, O=GTS Fastnet Connect
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY EKU OK
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 ++ Certificate has EKU (str) TLS Web Client Authentication, expects TLS Web Client Authentication
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Validating certificate extended key usage
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY KU OK
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY OK: depth=1, CN=fastnet-internal-ca, C=ZA, L=Cape Town, O=GTS Fastnet Connect
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY SCRIPT OK: depth=1, CN=fastnet-internal-ca, C=ZA, L=Cape Town, O=GTS Fastnet Connect
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY WARNING: depth=1, unable to get certificate CRL: CN=fastnet-internal-ca, C=ZA, L=Cape Town, O=GTS Fastnet Connect
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 VERIFY WARNING: depth=0, unable to get certificate CRL: CN=JHB_backup, C=ZA, L=Cape Town, O=GTS Fastnet Connect
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Data Channel MTU parms [ mss_fix:0 max_frag:0 tun_mtu:1500 tun_max_mtu:1600 headroom:136 payload:1768 tailroom:562 ET:0 ]
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Control Channel MTU parms [ mss_fix:0 max_frag:0 tun_mtu:1250 tun_max_mtu:0 headroom:126 payload:1600 tailroom:126 ET:0 ]
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Incoming Control Channel Authentication: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Outgoing Control Channel Authentication: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 19:21:20	openvpn	33612	156.38.137.242:1194 Re-using SSL/TLS context
Jan 23 19:21:20	openvpn	33612	Connection Attempt MULTI: multi_create_instance called

          The CSO is the same "JHB_backup".

          V lifeboyL 2 Replies Last reply Reply Quote 0
          • V
            viragomann @lifeboy
            last edited by viragomann

            @lifeboy
            We are searching for a line like this
            22283bb1-86a6-4a42-bce4-57be2e6b273c-grafik.png

            Obviously there is no match as mentioned above.

            If a CSO is applied and there are Remote Networks stated, then you also see lines about adding the routes.

            1 Reply Last reply Reply Quote 0
            • lifeboyL
              lifeboy @lifeboy
              last edited by

              @lifeboy At the client however, I see this is the log.

              Jan 23 19:31:12 	openvpn 	9101 	Initialization Sequence Completed
Jan 23 19:31:12 	openvpn 	9101 	ERROR: FreeBSD route add command failed: external program exited with error status: 1
Jan 23 19:31:12 	openvpn 	9101 	/sbin/route add -net 192.168.111.0 10.0.111.1 255.255.255.0
Jan 23 19:31:12 	openvpn 	9101 	/sbin/route add -net 192.168.161.0 10.0.111.1 255.255.255.0
Jan 23 19:31:12 	openvpn 	9101 	ERROR: FreeBSD route add command failed: external program exited with error status: 1
Jan 23 19:31:12 	openvpn 	9101 	/sbin/route add -net 192.168.131.0 10.0.111.1 255.255.255.0
Jan 23 19:31:12 	openvpn 	9101 	/sbin/route add -net 192.168.131.0 10.0.111.1 255.255.255.0

              The route add fails.

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

                @lifeboy
                That's bad though.

                Did you check "Don't add routes" in the client settings?

                Are these routes even added successfully?
                This could possibly happen if you have added the remote networks in the client settings, and also the server is pushing them. In this case you can remote the subnets from the "Local networks" box at the server.

                lifeboyL 1 Reply Last reply Reply Quote 0
                • lifeboyL
                  lifeboy @viragomann
                  last edited by

                  @viragomann No, I don't have networks specced in the client. I did have before, but since removed them to make sure there's no clash.

                  I do see this though:

                  [2.7.0-RELEASE][roland@fw-1A.fast.za.net]/home/roland: ping 10.0.111.2
PING 10.0.111.2 (10.0.111.2): 56 data bytes
^C
--- 10.0.111.2 ping statistics ---
7 packets transmitted, 0 packets received, 100.0% packet loss
[2.7.0-RELEASE][roland@fw-1A.fast.za.net]/home/roland: ping 10.0.111.1
PING 10.0.111.1 (10.0.111.1): 56 data bytes
64 bytes from 10.0.111.1: icmp_seq=0 ttl=64 time=0.871 ms
64 bytes from 10.0.111.1: icmp_seq=1 ttl=64 time=0.088 ms
64 bytes from 10.0.111.1: icmp_seq=2 ttl=64 time=0.076 ms
^C
--- 10.0.111.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.076/0.345/0.871/0.372 ms
[2.7.0-RELEASE][roland@fw-1A.fast.za.net]/home/roland:

                  Which doesn't make sense. It's almost as if the connection is not up, but it is.

                  743ad152-d750-4cb0-b219-1e129e059d37-image.png

                  lifeboyL V 2 Replies Last reply Reply Quote 0
                  • lifeboyL
                    lifeboy @lifeboy
                    last edited by

                    I have removed the network specs in the CSO now the route add error is gone. Still can't reach the client from the server though or even ping 10.0.111.2.

                    Jan 23 20:33:44 	openvpn 	79155 	Protocol options: explicit-exit-notify 3, protocol-flags cc-exit tls-ekm dyn-tls-crypt
Jan 23 20:33:44 	openvpn 	79155 	Timers: ping 10, ping-restart 60
Jan 23 20:33:44 	openvpn 	79155 	Data Channel: cipher 'AES-256-GCM', peer-id: 0
Jan 23 20:33:44 	openvpn 	79155 	Initialization Sequence Completed
Jan 23 20:33:44 	openvpn 	79155 	Incoming Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Jan 23 20:33:44 	openvpn 	79155 	Outgoing Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Jan 23 20:33:44 	openvpn 	79155 	Incoming dynamic tls-crypt: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 20:33:44 	openvpn 	79155 	Incoming dynamic tls-crypt: Cipher 'AES-256-CTR' initialized with 256 bit key
Jan 23 20:33:44 	openvpn 	79155 	Outgoing dynamic tls-crypt: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 20:33:44 	openvpn 	79155 	Outgoing dynamic tls-crypt: Cipher 'AES-256-CTR' initialized with 256 bit key
Jan 23 20:33:44 	openvpn 	79155 	Data Channel MTU parms [ mss_fix:1400 max_frag:0 tun_mtu:1500 tun_max_mtu:1600 headroom:136 payload:1768 tailroom:562 ET:0 ]
Jan 23 20:33:44 	openvpn 	79155 	/sbin/route add -net 192.168.161.0 10.0.111.1 255.255.255.0
Jan 23 20:33:44 	openvpn 	79155 	/sbin/route add -net 192.168.131.0 10.0.111.1 255.255.255.0
Jan 23 20:33:44 	openvpn 	79155 	/usr/local/sbin/ovpn-linkup ovpnc1 1500 0 10.0.111.2 255.255.255.0 init
Jan 23 20:33:44 	openvpn 	79155 	/sbin/ifconfig ovpnc1 10.0.111.2/24 mtu 1500 up
Jan 23 20:33:44 	openvpn 	79155 	do_ifconfig, ipv4=1, ipv6=0
Jan 23 20:33:44 	openvpn 	79155 	TUN/TAP device /dev/tun1 opened
Jan 23 20:33:44 	openvpn 	79155 	TUN/TAP device ovpnc1 exists previously, keep at program end
Jan 23 20:33:44 	openvpn 	79155 	ROUTE_GATEWAY 156.38.137.241/255.255.255.248 IFACE=vtnet1 HWADDR=bc:24:11:cb:4f:1e
Jan 23 20:33:44 	openvpn 	79155 	OPTIONS IMPORT: tun-mtu set to 1500
Jan 23 20:33:44 	openvpn 	79155 	OPTIONS IMPORT: route-related options modified
Jan 23 20:33:44 	openvpn 	79155 	OPTIONS IMPORT: route options modified
Jan 23 20:33:44 	openvpn 	79155 	OPTIONS IMPORT: --ifconfig/up options modified
Jan 23 20:33:44 	openvpn 	79155 	PUSH: Received control message: 'PUSH_REPLY,route 192.168.131.0 255.255.255.0,route 192.168.161.0 255.255.255.0,route-gateway 10.0.111.1,topology subnet,ping 10,ping-restart 60,ifconfig 10.0.111.2 255.255.255.0,peer-id 0,cipher AES-256-GCM,protocol-flags cc-exit tls-ekm dyn-tls-crypt,tun-mtu 1500'
                    lifeboyL 1 Reply Last reply Reply Quote 0
                    • lifeboyL
                      lifeboy @lifeboy
                      last edited by

                      Here's what the server logs report:

                      Jan 23 20:33:44 fw-1A openvpn[99185]: 156.38.137.242:1194 [JHB_backup] Peer Connection Initiated with [AF_INET]156.38.137.242:1194
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 MULTI_sva: pool returned IPv4=10.0.111.2, IPv6=(Not enabled)
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 MULTI: Learn: 10.0.111.2 -> JHB_backup/156.38.137.242:1194
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 MULTI: primary virtual IP for JHB_backup/156.38.137.242:1194: 10.0.111.2
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Data Channel MTU parms [ mss_fix:1400 max_frag:0 tun_mtu:1500 tun_max_mtu:1600 headroom:136 payload:1768 tailroom:562 ET:0 ]
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Outgoing dynamic tls-crypt: Cipher 'AES-256-CTR' initialized with 256 bit key
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Outgoing dynamic tls-crypt: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Incoming dynamic tls-crypt: Cipher 'AES-256-CTR' initialized with 256 bit key
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Incoming dynamic tls-crypt: Using 256 bit message hash 'SHA256' for HMAC authentication
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Outgoing Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Incoming Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 SENT CONTROL [JHB_backup]: 'PUSH_REPLY,route 192.168.131.0 255.255.255.0,route 192.168.161.0 255.255.255.0,route-gateway 10.0.111.1,topology subnet,ping 10,ping-restart 
60,ifconfig 10.0.111.2 255.255.255.0,peer-id 0,cipher AES-256-GCM,protocol-flags cc-exit tls-ekm dyn-tls-crypt,tun-mtu 1500' (status=1)
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 MULTI: bad source address from client [::], packet dropped
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 MULTI: bad source address from client [::], packet dropped
Jan 23 20:33:44 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 MULTI: bad source address from client [::], packet dropped
Jan 23 20:33:46 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Data Channel: cipher 'AES-256-GCM', peer-id: 0
Jan 23 20:33:46 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Timers: ping 10, ping-restart 120
Jan 23 20:33:46 fw-1A openvpn[99185]: JHB_backup/156.38.137.242:1194 Protocol options: explicit-exit-notify 1, protocol-flags cc-exit tls-ekm dyn-tls-crypt
Jan 23 20:34:09 fw-1A openvpn[71328]: MANAGEMENT: Client connected from /var/etc/openvpn/server2/sock
Jan 23 20:34:09 fw-1A openvpn[71328]: MANAGEMENT: CMD 'status 2'
Jan 23 20:34:10 fw-1A openvpn[71328]: MANAGEMENT: CMD 'quit'
Jan 23 20:34:10 fw-1A openvpn[71328]: MANAGEMENT: Client disconnected
Jan 23 20:34:10 fw-1A openvpn[95882]: MANAGEMENT: Client connected from /var/etc/openvpn/server4/sock
Jan 23 20:34:11 fw-1A openvpn[95882]: MANAGEMENT: CMD 'status 2'
Jan 23 20:34:11 fw-1A openvpn[95882]: MANAGEMENT: CMD 'quit'
Jan 23 20:34:11 fw-1A openvpn[95882]: MANAGEMENT: Client disconnected
Jan 23 20:34:20 fw-1A openvpn[71328]: MANAGEMENT: Client connected from /var/etc/openvpn/server2/sock
Jan 23 20:34:20 fw-1A openvpn[71328]: MANAGEMENT: CMD 'status 2'
Jan 23 20:34:20 fw-1A openvpn[71328]: MANAGEMENT: Client disconnected
                      lifeboyL 1 Reply Last reply Reply Quote 0
                      • lifeboyL
                        lifeboy @lifeboy
                        last edited by

                        I think I'll just delete the config (server and client) and redo it all. Something got messed up and I don't know where or what.

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

                          @lifeboy said in P2P VPN server can't reach client, but client can reach server:

                          I do see this though:

                          [2.7.0-RELEASE][roland@fw-1A.fast.za.net]/home/roland: ping 10.0.111.2
                          PING 10.0.111.2 (10.0.111.2): 56 data bytes

                          At the server or at client?
                          I'd expect, that you can access it from both. However, for accessing from the server side you need a proper rule to allow this.

                          lifeboyL 1 Reply Last reply Reply Quote 0
                          • lifeboyL
                            lifeboy @viragomann
                            last edited by

                            @viragomann That's on the server side.

                            Which is the problem I started out with. I cannot reach anything on the client side from the server, but from the client I can see the server and the LAN machines perfectly.

                            I wonder of Xneelo, the hosting provider, are doing something that blocks the traffic? Is it even possible to establish the tunnel and then block traffic over it?

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

                              @lifeboy

                              Which is the problem I started out with. I cannot reach anything on the client side from the server, but from the client I can see the server and the LAN machines perfectly.

                              My assumption was that this concerns networks behind the client node. For this the CSO comes into play.
                              But you should be at least able to access the clients virtual IP, even independently from a working CSO, presumed the firewall rule at the client allows it.

                              I wonder of Xneelo, the hosting provider, are doing something that blocks the traffic? Is it even possible to establish the tunnel and then block traffic over it?

                              No, if the traffic flows well in the one direction it should also go into the other.

                              lifeboyL 1 Reply Last reply Reply Quote 0
                              • lifeboyL
                                lifeboy @viragomann
                                last edited by lifeboy

                                @viragomann said in P2P VPN server can't reach client, but client can reach server:

                                @lifeboy

                                Which is the problem I started out with. I cannot reach anything on the client side from the server, but from the client I can see the server and the LAN machines perfectly.

                                My assumption was that this concerns networks behind the client node. For this the CSO comes into play.
                                But you should be at least able to access the clients virtual IP, even independently from a working CSO, presumed the firewall rule at the client allows it.

                                The client has an allow-all traffic rule at this stage (just for the testing phase).
                                dece9776-315e-4f4f-8a75-9bfbc5a8b7ab-image.png

                                I wonder of Xneelo, the hosting provider, are doing something that blocks the traffic? Is it even possible to establish the tunnel and then block traffic over it?

                                No, if the traffic flows well in the one direction it should also go into the other.

                                This is quite perplexing. What else could be blocking traffic to flow from the server to the client that is not blocking traffic from the client to the server??

                                lifeboyL V 2 Replies Last reply Reply Quote 0
                                • lifeboyL
                                  lifeboy @lifeboy
                                  last edited by lifeboy

                                  I'm comparing the config between this new TLS connection (let's call it link2) and an existing P2P shared key link (that runs to another pfSense client). Call this link1.

                                  The IPv4 Tunnel Network for link1 is 10.0.1.0/24 and when the tunnel starts, it assigns 10.0.1.1 to the server and 10.0.1.2 to the client. I can ping both these from the server and the client.

                                  For link2 however (IPv4 Tunnel Network 10.0.111.0/24) , both the server and the client get 10.0.111.2 !! Surely that is a problem?

                                  Look at the routing table on the server:

                                  default			197.214.119.129	UGS	18	1500	vtnet1.650	
10.0.1.1		link#11		UHS	69	16384	lo0	
10.0.1.2		link#16		UH	68	1500	ovpns1	
10.0.111.0/24		link#17		U	40	1500	ovpns5	
10.0.111.1		link#11		UHS	71	16384	lo0	
10.210.10.0/24		192.168.142.102	UGS	19	1500	vtnet5	
10.210.20.0/24		192.168.142.102	UGS	19	1500	vtnet5	
10.210.30.0/24		192.168.142.102	UGS	19	1500	vtnet5	
10.210.40.0/24		192.168.142.102	UGS	19	1500	vtnet5	
127.0.0.1		link#11		UH	2	16384	lo0	
168.253.202.96/27	link#8		U	14	1500	vtnet7	
168.253.202.97		link#11		UHS	15	16384	lo0	
168.253.202.98		link#11		UHS	15	16384	lo0	
192.168.111.0/24	10.0.111.2	UGS	72	1500	ovpns5

                                  (updated with more routes shown)
                                  10.0.111.1 is on link#11, but ovpns5 is on link#19. Why is 10.0.111.1 on the wrong link? Or am I reading this incorrectly?

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                                  • lifeboyL
                                    lifeboy @lifeboy
                                    last edited by

                                    @lifeboy It seems that the GUI just displays the wrong address. It should have 10.0.111.1, instead of 10.0.111.2

                                    26ca0107-b0c9-438f-b1ed-8cf10eb8f228-image.png

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                                    • lifeboyL
                                      lifeboy @lifeboy
                                      last edited by

                                      I also see, since I enabled logging on the OVPN outgoing trafffic that the ping is leaving the server.

                                      Jan 24 11:45:13	LAN	 Default allow LAN to any rule (1577106904)	  192.168.131.150	  10.0.111.2	ICMP
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                                      • lifeboyL
                                        lifeboy @lifeboy
                                        last edited by lifeboy

                                        In the client I now see the traffic is actually blocked!

                                        Jan 24 09:50:01 	ovpnc1 	Default deny rule IPv4 (1000000103) 	192.168.131.150		10.0.111.2		ICMP
Jan 24 09:50:01 	ovpnc1 	Default deny rule IPv4 (1000000103) 	10.0.111.1		10.0.111.2		ICMP
Jan 24 09:50:00 	ovpnc1 	Default deny rule IPv4 (1000000103) 	192.168.131.150		10.0.111.2		ICMP
Jan 24 09:50:00 	ovpnc1 	Default deny rule IPv4 (1000000103) 	10.0.111.1		10.0.111.2		ICMP
Jan 24 09:49:59 	ovpnc1 	Default deny rule IPv4 (1000000103) 	192.168.131.150		10.0.111.2		ICMP
Jan 24 09:49:59 	WAN 	Allow all ipv4 (1705832241) 	203.128.94.74:64008		156.38.137.242:445		TCP:S
Jan 24 09:49:59 	ovpnc1 	Default deny rule IPv4 (1000000103) 	10.0.111.1		10.0.111.2		ICMP
Jan 24 09:49:58 	ovpnc1 	Default deny rule IPv4 (1000000103) 	192.168.131.150		10.0.111.2		ICMP
Jan 24 09:49:58 	ovpnc1 	Default deny rule IPv4 (1000000103) 	10.0.111.1		10.0.111.2		ICMP

                                        Surely these rules cancel the default deny rule?

                                        729b8fae-1d12-4343-ba7c-66df8a0458b4-image.png

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                                        • V
                                          viragomann @lifeboy
                                          last edited by

                                          @lifeboy said in P2P VPN server can't reach client, but client can reach server:

                                          The client has an allow-all traffic rule at this stage (just for the testing phase).

                                          You need to allow incoming traffic on the OpenVPN interface.
                                          Nothing will enter on you WAN. It's just the client connection going out there. So there is no rule needed on WAN for the site2site VPN on the client.

                                          I'm comparing the config between this new TLS connection (let's call it link2) and an existing P2P shared key link (that runs to another pfSense client). Call this link1.

                                          Shared key OpenVPN behaves different. A s2s doesn't require a CSO, even if the tunnel is wider. However, the server does only allow a single client to connect.

                                          Look at the routing table on the server:
                                          (updated with more routes shown)
                                          10.0.111.1 is on link#11, but ovpns5 is on link#19. Why is 10.0.111.1 on the wrong link? Or am I reading this incorrectly?

                                          10.0.111.1 is the loopback address, it's the servers virtual IP.
                                          The links are just used by the OS internally to handle the connections.

                                          It seems that the GUI just displays the wrong address. It should have 10.0.111.1, instead of 10.0.111.2

                                          This is the server state. It lists up each connected client with its public and its virtual IP. 10.0.111.2 is the clients virtual IP.

                                          lifeboyL 1 Reply Last reply Reply Quote 0
                                          • lifeboyL
                                            lifeboy @viragomann
                                            last edited by lifeboy

                                            @viragomann, the rules I have are below.

                                            on the client:

                                            24b602af-8ef0-4fc3-90f5-d7a925257eb9-image.png

                                            and

                                            0bc9f946-e079-42bb-bdff-7564e803ca7c-image.png

                                            On the server they are similar.

                                            f8f7053f-5af7-4485-9eaf-fbd69706a9cf-image.png

                                            Of course there are many WAN rules, but the ones that are relevant are:

                                            ef6b8ad1-a3d2-4631-af30-36ac07c0f955-image.png
                                            This allows the ovpn client to connect.

                                            What else is needed to get the traffic flowing then?

                                            lifeboyL 1 Reply Last reply Reply Quote 0
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