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    Problem with NAT. Can't forward port from WAN to LAN.

    Scheduled Pinned Locked Moved NAT
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    • DerelictD Offline
      Derelict LAYER 8 Netgate
      last edited by

      Well, there's not much else to a port forward, so it has to be something.  Does tcpdump on LAN show the SYNs going from 177.143.120.78 to 192.168.10.251:3389?  What states are created? (Diagnostics > States).

      Load sharing…  Are you sure you have the port forward on the interface that has the IP specified?  Are the clients connecting to the right interface?

      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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      • W Offline
        wwatanabe
        last edited by

        I'm new with PFSense and TCPDump, sorry if it's not what you ask.

        I Run TCPDump and try to connect with RDP.

        ==================
        em1 -> LAN

        [2.1.5-RELEASE][root@host]/root(14): tcpdump -ni em1 | grep 192.168.10.251.3389
        tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
        listening on em1, link-type EN10MB (Ethernet), capture size 96 bytes
        23:36:44.807796 IP 177.143.120.78.45783 > 192.168.10.251.3389: Flags [ S ], seq 3165976847, win 8192, options [mss 1460,nop,wscale 2,nop,nop,sackOK], length 0
        23:36:44.807877 IP 192.168.10.251.3389 > 177.143.120.78.45783: Flags [S.], seq 3448840707, ack 3165976848, win 16384, options [mss 1460,nop,wscale 0,nop,nop,sackOK], length 0
        23:36:44.832998 IP 177.143.120.78.45783 > 192.168.10.251.3389: Flags [.], ack 1, win 4380, length 0
        23:36:44.833113 IP 192.168.10.251.3389 > 177.143.120.78.45783: Flags [R], seq 3448840708, win 0, length 0
        23:36:44.839389 IP 177.143.120.78.45783 > 192.168.10.251.3389: Flags [P.], ack 1, win 4380, length 19
        23:36:44.839444 IP 192.168.10.251.3389 > 177.143.120.78.45783: Flags [R], seq 3448840708, win 0, length 0

        ======================

        [2.1.5-RELEASE][root@macfw001.macco.local]/root(12): tcpdump -ni em1 | grep 177.143.120.78
        tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
        listening on em1, link-type EN10MB (Ethernet), capture size 96 bytes
        23:35:59.469877 IP 177.143.120.78.46898 > 192.168.10.251.3389: Flags [ S ], seq 1760568614, win 8192, options [mss 1460,nop,wscale 2,nop,nop,sackOK], length 0
        23:35:59.469985 IP 192.168.10.251.3389 > 177.143.120.78.46898: Flags [S.], seq 408005352, ack 1760568615, win 16384, options [mss 1460,nop,wscale 0,nop,nop,sackOK], length 0
        23:35:59.492434 IP 177.143.120.78.46898 > 192.168.10.251.3389: Flags [.], ack 1, win 4380, length 0
        23:35:59.492551 IP 192.168.10.251.3389 > 177.143.120.78.46898: Flags [R], seq 408005353, win 0, length 0
        23:35:59.505291 IP 177.143.120.78.46898 > 192.168.10.251.3389: Flags [P.], ack 1, win 4380, length 19
        23:35:59.505347 IP 192.168.10.251.3389 > 177.143.120.78.46898: Flags [R], seq 408005353, win 0, length 0
        23:36:00.260803 IP 177.143.120.78.33622 > 192.168.10.251.59387: UDP, length 97
        23:36:00.289429 IP 177.143.120.78.33622 > 192.168.10.251.59387: UDP, length 40
        23:36:00.289537 IP 192.168.10.251.59387 > 177.143.120.78.33622: UDP, length 52
        23:36:05.662522 IP 177.143.120.78.39432 > 192.168.10.251.3389: Flags [ S ], seq 871328353, win 8192, options [mss 1460,nop,wscale 2,nop,nop,sackOK], length 0
        23:36:05.662592 IP 192.168.10.251.3389 > 177.143.120.78.39432: Flags [S.], seq 939867809, ack 871328354, win 16384, options [mss 1460,nop,wscale 0,nop,nop,sackOK], length 0
        23:36:05.684492 IP 177.143.120.78.39432 > 192.168.10.251.3389: Flags [.], ack 1, win 4380, length 0
        23:36:05.684594 IP 192.168.10.251.3389 > 177.143.120.78.39432: Flags [R], seq 939867810, win 0, length 0
        23:36:05.691017 IP 177.143.120.78.39432 > 192.168.10.251.3389: Flags [P.], ack 1, win 4380, length 19
        23:36:05.691078 IP 192.168.10.251.3389 > 177.143.120.78.39432: Flags [R], seq 939867810, win 0, length 0
        ^C189 packets captured
        191 packets received by filter
        0 packets dropped by kernel

        =======================

        There are just a LAN interface, it's connected in the LAN Switch and all Hosts are surfing ok, accessing PFSense as gateway and Proxy/Squid/SquidGuard is working fine.

        STATES with 177.143.120.78 (Filtered)

        tcp  200.200.200.200:40022 <- 177.143.120.78:48036  ESTABLISHED:ESTABLISHED 
        udp  177.143.120.78:33622 <- 192.168.10.251:59387  MULTIPLE:MULTIPLE 
        udp  192.168.10.251:59387 -> 200.200.200.200:30913 -> 177.143.120.78:33622  MULTIPLE:MULTIPLE 
        tcp  200.200.200.200:40443 <- 177.143.120.78:36373  TIME_WAIT:TIME_WAIT 
        tcp  200.200.200.200:40443 <- 177.143.120.78:42641  ESTABLISHED:ESTABLISHED 
        tcp  200.200.200.200:40443 <- 177.143.120.78:49046  TIME_WAIT:TIME_WAIT 
        tcp  200.200.200.200:40443 <- 177.143.120.78:46285  ESTABLISHED:ESTABLISHED

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        • W Offline
          wwatanabe
          last edited by

          http://imgur.com/a/c5sDz

          Image with the Rule and NAT.

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          • DerelictD Offline
            Derelict LAYER 8 Netgate
            last edited by

            I guess I give up.  I could do the same port forward 1000 times and it would work every time.

            Your network is in an extremely insecure state right now.

            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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            • DerelictD Offline
              Derelict LAYER 8 Netgate
              last edited by

              It looks like the NAT is working, to me.  No idea why you can't establish a session.

              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)

              1 Reply Last reply Reply Quote 0
              • W Offline
                wwatanabe
                last edited by

                I put the network in this open situation for testing this NAT problem.

                Thanks a lot for you help. I think I'll try to reinstall PFSense.

                Regards,

                Wellington

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                • johnpozJ Offline
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  "23:35:59.492551 IP 192.168.10.251.3389 > 177.143.120.78.46898: Flags [R], seq 408005353, win 0, length 0"

                  Sure looks like box your trying to rdp to, and was correctly forwarded by pfsense is sending RESET

                  So what does that have to do with pfsense??  Why don't you download the sniff and open it in wireshark.. But you need to look on the box to see why its sending RESET!!

                  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 25.07.1 | Lab VMs 2.8, 25.07.1

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                  • DerelictD Offline
                    Derelict LAYER 8 Netgate
                    last edited by

                    Probably disallowing connections from foreign networks but he doesn't want to listen.  "It works fine from LAN."

                    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)

                    1 Reply Last reply Reply Quote 0
                    • T Offline
                      tom-- 1
                      last edited by

                      Hi farion

                      Your dropbox-links are annoying, because they are no longer available - and therefore other users can not benefit from this post: your pictures are missing now :-(

                      It would help if you just attach pictures to your posts as other users are doing.

                      Thanks a lot in advance,
                      kind regards,
                      Tom

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