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    Issue with routing and emails

    Scheduled Pinned Locked Moved Firewalling
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    • vallumV
      vallum
      last edited by

      Hi ,

      I have below setup :-

      Untitled

      And Facing this strange issue with emails.
      users are able to receive but not able to send emails , (Blank email is getting delivered i.e without any body and content)

      users have ip address from 192.168.1.10 to 192.168.1.13
      using gateway as 192.168.1.1

      On Pfsense i have written static route to 192.168.1.2 for subnet 172.16.0.0/16

      when i change gateway of user from 192.168.1.1 to 192.168.1.2 then emails works fine, but internet stops.

      Please suggest.

      Manu

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        You are asymmetrical  Connect your downstream router your email server is on via transit.. All your hosts there on the transit 1.10, 1.11, etc..

        Also your layer 2 is also doing layer 3 it seems since the mpls link endpoint is there..

        Is your email server really on a /16 or is that the route you just created to cover the network its own?  Whats the gateway of your email server?

        emailviatransit.png
        emailviatransit.png_thumb

        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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        • JKnottJ
          JKnott
          last edited by

          when i change gateway of user from 192.168.1.1 to 192.168.1.2 then emails works fine, but internet stops.

          You can't have more than one device on the same IP address.  Also, how do the users know how to reach the mail server?  That would need a specific route to it.

          PfSense running on Qotom mini PC
          i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
          UniFi AC-Lite access point

          I haven't lost my mind. It's around here...somewhere...

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          • vallumV
            vallum
            last edited by

            Also your layer 2 is also doing layer 3 it seems since the mpls link endpoint is there..

            I have updated the diagram ,  there is one router configured as MPLS endpoint (192.168.1.2) which is configured to forward everything to HUB location i.e layer 3 and at layer 3 reverse route is configured.

            Is your email server really on a /16 or is that the route you just created to cover the network its own?  Whats the gateway of your email server?

            Email Server is on some different IP but subset is common (and part of LAN )  , we have various VLAN configured (172.16.3.10, 4.10 , 5.10 )  , gateway of email server is 172.16.2.2

            Manu

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            • johnpozJ
              johnpoz LAYER 8 Global Moderator
              last edited by

              And its still Asymmetrical… Do it this way...

              asymet.png_thumb
              asymet.png
              transit.png
              transit.png_thumb

              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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              • vallumV
                vallum
                last edited by

                @johnpoz:

                And its still Asymmetrical… Do it this way...

                It is working now. Just followed your advice and updated my network topology.

                Thank you very much:)

                Manu

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