Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Weird Problem

    Scheduled Pinned Locked Moved Firewalling
    14 Posts 4 Posters 1.5k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • johnpozJ
      johnpoz LAYER 8 Global Moderator
      last edited by

      you running pfblock and blocking countries?  Pfsense just sends traffic to your gateway (isp) if you can not get somewhere then that is on isp.. Simple sniff on pfsense wan will show you if its sending for example traffic to 8.8.8.8 to your isp.

      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

      1 Reply Last reply Reply Quote 0
      • Z
        zoro_2009
        last edited by

        Nope, just a basic fresh setup, no pfblock or any other custom rule in place !
        And, yes, pfSense does send the request out to the modem, which is really weird !

        1 Reply Last reply Reply Quote 0
        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by

          Well then you need to call your isp.. They may have you locked down.. Via the pfsense mac being different then when you run it with ipcop… Did you power cycle the modem when you connected the new device

          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

          1 Reply Last reply Reply Quote 0
          • Z
            zoro_2009
            last edited by

            @johnpoz:

            Well then you need to call your isp.. They may have you locked down.. Via the pfsense mac being different then when you run it with ipcop… Did you power cycle the modem when you connected the new device

            That can't be, because pfSense is connected to one of the LAN ports of the modem (modem is doing pppoe, not pfSense) !
            And to confuse you more, I've tried this setup:

            Internet  –->  Modem  --->  IPCop  --->  pfSense  --->  Clients

            It resulted in the same problem, being modem and IPCop can't reach 8.8.8.8 but can perfectly reach within country hosted servers !

            1 Reply Last reply Reply Quote 0
            • DerelictD
              Derelict LAYER 8 Netgate
              last edited by

              There is nothing in pfSense that will do that unless you install pfBlockerNG and filter by country, etc.

              Is it just 8.8.8.8 giving you a problem or is it everything? Can you ping 9.9.9.9 for instance?

              You might have 8.8.8.8 defined as a DNS server with a gateway set or something which creates a host route out that specific interface for that destination out that specific interface. Setting it as a monitor IP address on a gateway does the same.

              Packet capture on your WAN for host 8.8.8.8 and ping it. Stop the capture and look. If you see echo requests and no reply, pfSense is sending it and not receiving a reply. Look upstream.

              If you don't see the echo requests on that interface, you have configured them to be sent someplace else and you will need to figure that out.

              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
              • Z
                zoro_2009
                last edited by

                @Derelict:

                There is nothing in pfSense that will do that unless you install pfBlockerNG and filter by country, etc.

                Is it just 8.8.8.8 giving you a problem or is it everything? Can you ping 9.9.9.9 for instance?

                You might have 8.8.8.8 defined as a DNS server with a gateway set or something which creates a host route out that specific interface for that destination out that specific interface. Setting it as a monitor IP address on a gateway does the same.

                Packet capture on your WAN for host 8.8.8.8 and ping it. Stop the capture and look. If you see echo requests and no reply, pfSense is sending it and not receiving a reply. Look upstream.

                If you don't see the echo requests on that interface, you have configured them to be sent someplace else and you will need to figure that out.

                Here are some of the details:

                • The modem is configured with 8.8.8.8 as it's main DNS server

                • Can't reach anything on the Internet (not just 8.8.8.8 )

                • Local websites (within my country) works perfectly fine !

                • When I hook up pfSense, the disconnection problem appears, not just pfSense and clients, but even the modem loses Internet, there is a Diagnostic section in the modem which I can ping hosts, and pinging 8.8.8.8 yields nothing from the modem itself !

                • I remove pfSense from the network and replace it with IPCop, and everything goes back to normal !

                Can it be a routing loop ?

                I am not at work right now, so I don't have the chance to take packet capture, but will do that !

                1 Reply Last reply Reply Quote 0
                • Z
                  zoro_2009
                  last edited by

                  @Derelict:

                  There is nothing in pfSense that will do that unless you install pfBlockerNG and filter by country, etc.

                  Is it just 8.8.8.8 giving you a problem or is it everything? Can you ping 9.9.9.9 for instance?

                  You might have 8.8.8.8 defined as a DNS server with a gateway set or something which creates a host route out that specific interface for that destination out that specific interface. Setting it as a monitor IP address on a gateway does the same.

                  Packet capture on your WAN for host 8.8.8.8 and ping it. Stop the capture and look. If you see echo requests and no reply, pfSense is sending it and not receiving a reply. Look upstream.

                  If you don't see the echo requests on that interface, you have configured them to be sent someplace else and you will need to figure that out.

                  can you please elaborate on this, as my guts are telling me the issue is coming from that

                  1 Reply Last reply Reply Quote 0
                  • DerelictD
                    Derelict LAYER 8 Netgate
                    last edited by

                    can you please elaborate on this, as my guts are telling me the issue is coming from that

                    If that was the problem it would only affect the specific addresses you have /32 routes for, not "everything outside your country" as you assert.

                    Post the output from Diagnostics > Command Prompt. Execute this: netstat -rn

                    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
                    • Z
                      zoro_2009
                      last edited by

                      @Derelict:

                      can you please elaborate on this, as my guts are telling me the issue is coming from that

                      If that was the problem it would only affect the specific addresses you have /32 routes for, not "everything outside your country" as you assert.

                      Post the output from Diagnostics > Command Prompt. Execute this: netstat -rn

                      Ok, will do tomorrow at work, thanks !

                      1 Reply Last reply Reply Quote 0
                      • Z
                        zoro_2009
                        last edited by

                        Hello, per your request, here is the result of netstat -rn

                        [code]Routing tables
                        
                        Internet:
                        Destination        Gateway            Flags     Netif Expire
                        default            192.168.1.1        UGS         re0
                        127.0.0.1          link#3             UH          lo0
                        172.17.10.0/24     link#2             U           rl0
                        172.17.10.1        link#2             UHS         lo0
                        192.168.1.0/24     link#1             U           re0
                        192.168.1.50       link#1             UHS         lo0[/code]
                        
                        [i]172.17.10.0/24[/i] is the LAN's side and [i]192.168.1.0/24[/i] is the WAN's side hooked to the modem's LAN port !
                        
                        (no IPv6 in place)
                        
                        Thanks !
                        
                        1 Reply Last reply Reply Quote 0
                        • DerelictD
                          Derelict LAYER 8 Netgate
                          last edited by

                          Nothing interesting there.

                          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
                          • First post
                            Last post
                          Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.