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    How to close Port 23, 53 and 80 on WAN?

    Scheduled Pinned Locked Moved Firewalling
    48 Posts 5 Posters 7.6k Views
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    • B
      Bernd6560
      last edited by

      Does that mean, even if it comes from VPN, it still blocked?

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        OMG dude - what part are you not getting about it is NOT coming down your freaking vpn!!

        The vpn is like your router in front of pfsense - pfsense didn't see shit until you forwarded the ports... Have you forwarded them on your vpn? Then they wouldn't be coming down your tunnel to pfsense..

        But you can block them all you want on the vpn interface you created that connects to your vpn.

        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 2.7.2, 24.11

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        • B
          Bernd6560
          last edited by

          I think I got it now, so I actually had what I wanted the whole time.

          But why are the Ports displayed as open, if stopped on VPN NAT?

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by johnpoz

            Dude they are showing open because your VPN service is running them - NOT that they are being sent down the tunnel to you... This has been like talking to a wall!!

            If you enable remote access on your router and have it listen to port 80.. Does it send that 80 to some client behind it..

            Your vpn service is just like a nat router.. And the clients using it are like your devices behind your router..

            Your not connected to that vpn service now right - well scan that IP you had.. What does it show open - while your not even connected to it.

            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 2.7.2, 24.11

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            • DerelictD
              Derelict LAYER 8 Netgate
              last edited by

              You cannot control what traffic arrives on your outside interfaces. All you can do is block it (not pass it) which is exactly what it happening there.

              the pfSense firewall, at its basic level, blocks all traffic into and out of any interface unless otherwise passed.

              There are some pass rules placed by default, like passing anything initiated by LAN hosts.

              If you do not put pass rules on your WAN, or your OpenVPN/assigned interface tab if that is also a WAN (as in the case of using a VPN provider) then any traffic initiated from the outside into those interfaces will be blocked (not passed - because there are no pass rules).

              I provided the answer to your question two days ago:

              Derelict 2 days ago
              Something in front of your pfSense firewall is likely responding on those.

              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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              • B
                Bernd6560 @johnpoz
                last edited by

                Your not connected to that vpn service now right - well scan that IP you had.. What does it show open - while your not even connected to it.

                VPN turned off and all ports forwarded to pfSense.

                Online scans show no open ports.
                Nmap also shows no open ports, although I've run all 65535 TCP and even all UDP.

                That's a relief, thank you for clarifying.

                I provided the answer to your question two days ago:

                You're right, it's just that I'm new to pfSense, so I'm not really confident to work with sensitive data, if I don't understand the basics.

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                • DerelictD
                  Derelict LAYER 8 Netgate
                  last edited by

                  @Bernd6560 said in How to close Port 23, 53 and 80 on WAN?:

                  VPN turned off and all ports forwarded to pfSense.
                  Online scans show no open ports.

                  The pfSense firewall would not be responding even if ports were forwarded to it.

                  Something UPSTREAM of it was responding. Maybe they turned that off.

                  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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                  • B
                    Bernd6560
                    last edited by

                    The pfSense firewall would not be responding even if ports were forwarded to it.

                    (VPN ON, Portforwarding OFF)

                    test port 443+VPN 2222.jpg

                    Whats going on here?

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                    • DerelictD
                      Derelict LAYER 8 Netgate
                      last edited by

                      Those look like outbound connections again. You are showing a test to 81.X.X.X and a packet capture on 52.202.215.126.

                      I have no idea how you can think those are related.

                      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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                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by johnpoz

                        Dude you seem to be just over your head is all... As derelict stated those are outbound.. Your seeing your own connection to the site your using to test

                        canyouseeme.org [52.202.215.126]

                        with would be my guess. That port for the 52 address is 443, that is the dest port of your test.. Yeah when you GO to that site you will see traffic to that site on the port you go too, ie https would be 443..

                        Then you have a 10 address.. Which your hiding? Why??? Its rfc1918 address..

                        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 2.7.2, 24.11

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