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    SMTP over WANB? (Multi-WAN config)

    Scheduled Pinned Locked Moved NAT
    52 Posts 2 Posters 18.9k Views
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    • D
      danswartz
      last edited by

      that is inbound smtp - i thought that worked and we were trying to fix outbound smtp to use WANB?  I went back and re-read your OP and saw you don't receive either.  It is hard to tell what is wrong this way.  Can you post screen captures of the rules (inbound and outbound) and NAT (inbound and outbound.)

      1 Reply Last reply Reply Quote 0
      • P
        pfnewbe
        last edited by

        ;D
        Found my outbound problem on the mailserver….
        Outbount route for the mailgw was working, but was forgotten to change the def.gw and namesever of the mailserver.
        sorry.
        Outbound mail is working perfect.
        Now only inbound to mailgw to solve... (yes, def.gw. and nameservers are ok on mailgw  ;))

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        • D
          danswartz
          last edited by

          Still would like to see screenshot of portforward and permission rules.

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          • P
            pfnewbe
            last edited by

            My outbound is working!
            My inbound still doesn't work.

            My only NAT-rule:

            If  Proto  Src. addr  Src. ports  Dest. addr  Dest. ports  NAT IP  NAT Ports  Description 
            WANB TCP * * WANB address 25 (SMTP) 192.168.2.16 25 (SMTP) NAT SMTP

            All my WANB-rules:

            ID  Proto  Source  Port  Destination  Port  Gateway  Queue  Schedule  Description 
            UDP * * WANB address 1194 (OpenVPN) * none    
            TCP * * 192.168.2.16 25 (SMTP) * none   NAT NAT SMTP

            ![Screenshot-fw1.lan - Firewall: NAT: Port Forward - Mozilla Firefox.png](/public/imported_attachments/1/Screenshot-fw1.lan - Firewall: NAT: Port Forward - Mozilla Firefox.png)
            ![Screenshot-fw1.lan - Firewall: NAT: Port Forward - Mozilla Firefox.png_thumb](/public/imported_attachments/1/Screenshot-fw1.lan - Firewall: NAT: Port Forward - Mozilla Firefox.png_thumb)

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            • P
              pfnewbe
              last edited by

              This screenshot om my rules

              ![Screenshot-fw1.lan - Firewall: Rules - Mozilla Firefox.png](/public/imported_attachments/1/Screenshot-fw1.lan - Firewall: Rules - Mozilla Firefox.png)
              ![Screenshot-fw1.lan - Firewall: Rules - Mozilla Firefox.png_thumb](/public/imported_attachments/1/Screenshot-fw1.lan - Firewall: Rules - Mozilla Firefox.png_thumb)

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              • D
                danswartz
                last edited by

                Hmmm, looks okay.  Are you sure the inbound smtp server has a default gateway pointing back to the pfsense?  If so, can you do a packet capture on the LAN interface while you try to connect from outside?

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                • P
                  pfnewbe
                  last edited by

                  Yup. Looks OK.

                  0.0.0.0        192.168.2.254  0.0.0.0        UG        0 0          0 eth0

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                  • P
                    pfnewbe
                    last edited by

                    Hmmmmm… This looks interesting! I've put all logging on and see this.

                    block
                    Aug 23 22:34:51 LAN 192.168.2.16:25 65.55.34.215:43338 TCP:SA
                    […]
                     pass
                    Aug 23 22:33:17 WANB 65.55.34.215:43338 192.168.2.16:25 TCP:S

                    Look to the difference between the two timestamps.
                    What can be the cause of this?

                    [update]
                    My rules:
                      ID  Proto  Source  Port  Destination  Port  Gateway  Queue  Schedule  Description

                    • 192.168.2.14 * * * WANB none   mail route via WANB

                    • 192.168.2.16 * * * WANB none   mailgw route via WANB

                    • LAN net * * * * none   Default allow LAN to any rule

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                    • D
                      danswartz
                      last edited by

                      that is odd for sure.  i am surprised you only see one SYN packet - if mailhost is not replying within a couple of seconds, we should have seen another.  instead of logging on the pfsense, please do a packet capture as i asked.

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                      • P
                        pfnewbe
                        last edited by

                        LAN or WANB?

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                        • D
                          danswartz
                          last edited by

                          LAN for starters.

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                          • P
                            pfnewbe
                            last edited by

                            lol….. wasn't able to upload here. I've send it to you mail.

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                            • P
                              pfnewbe
                              last edited by

                              with my old firewall works it okay!
                              So, I cannot imagine that it is a problem on the 192.168.2.16

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                              • D
                                danswartz
                                last edited by

                                please don't email me things like that.  i didn't want an entire packet capture - tracing only inbound SMTP requests should have created a more manageable file.

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                                • P
                                  pfnewbe
                                  last edited by

                                  Sorry. It was a capture of only port 25.
                                  What do I need to look for?

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                                  • D
                                    danswartz
                                    last edited by

                                    Can you do a numeric one instead?  This was on the LAN?

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                                    • P
                                      pfnewbe
                                      last edited by

                                      Yup. This was on LAN.

                                      Here's another one in numeric.

                                      23:43:18.825387 IP 65.55.34.203.19470 > 192.168.2.16.smtp: S 3691429999:3691429999(0) win 65535 <mss 1452,nop,nop,sackok="">23:43:18.825445 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:43:21.747190 IP 65.55.34.203.19470 > 192.168.2.16.smtp: S 3691429999:3691429999(0) win 65535 <mss 1452,nop,nop,sackok="">23:43:21.747222 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:43:23.358357 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:43:27.765613 IP 65.55.34.203.19470 > 192.168.2.16.smtp: S 3691429999:3691429999(0) win 65535 <mss 1452,nop,nop,sackok="">23:43:27.765646 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:43:29.358662 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:43:41.359231 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:43:43.759388 IP 192.168.2.16.smtp > 212.61.26.38.sdo-tls: S 3698667821:3698667821(0) ack 1312522795 win 5792 <mss 6="" 25655941="" 1460,nop,nop,timestamp="" 1212769185,nop,wscale="">23:44:05.570420 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">23:44:53.782771 IP 192.168.2.16.smtp > 65.55.34.203.19470: S 3797698790:3797698790(0) ack 3691430000 win 5840 <mss 1460,nop,nop,sackok="">Firewall log says:

                                      block
                                      Aug 23 23:42:47 LAN 192.168.2.16:25 65.55.34.203:19470 TCP:SA

                                      pass
                                      Aug 23 23:41:11 WANB 65.55.34.203:19470 192.168.2.16:25 TCP:S</mss></mss></mss></mss></mss></mss></mss></mss></mss></mss></mss></mss>

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                                      • D
                                        danswartz
                                        last edited by

                                        Okay, I am seeing the inbound SYN and the server is sending back SYN/ACK, and the sender is retrying with backoff which all looks good.  The question is why the SYN/ACK is not getting to the remote host.  Looking at your NAT and Rules, I note they are for the WAN side only.  Can you post your LAN rules and outbound (if any) NAT?

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                                        • P
                                          pfnewbe
                                          last edited by

                                          I've only 1 NAT-rule:
                                          If   Proto   Src. addr   Src. ports   Dest. addr   Dest. ports   NAT IP   NAT Ports   Description

                                          [Firewall rule ID is managed with this rule] WANB TCP * * WANB address 25 (SMTP) 192.168.2.16 25 (SMTP) NAT SMTP

                                          and my LAN-rules are as mentioned in my post of Reply #20

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                                          • D
                                            danswartz
                                            last edited by

                                            That is the inbound NAT rule - you have no outbound one?  Can you post /tmp/rules.debug?

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