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    Default deny rule IPv4 (1000000104) - from Firewall to Internet

    Scheduled Pinned Locked Moved Firewalling
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    • S Offline
      stiga @Gertjan
      last edited by

      @gertjan
      The public ip are like this:
      2022-03-28_191740.png

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      • johnpozJ Offline
        johnpoz LAYER 8 Global Moderator @stiga
        last edited by johnpoz

        @stiga those are all out of state outbound.. If your state table flushed then you could see those..

        That 40.90.x.x is MS owned IP

        173.222 is Akamai International, that 20.42 is MS as well.

        I can not think of any reason why pfsense would make connections to those networks. Are you running proxy? Are you loading ip lists from pfblocker or something.

        There should be no reason out of the box pfsense itself would connect to those network.. It checks for updates, and packages - those wuld not be hosted by those IPs AFAIK.

        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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        • bingo600B Offline
          bingo600 @johnpoz
          last edited by bingo600

          @johnpoz
          Seems to me they are "origining on em1" wouldn't that possible be "Lan" , and that it could be M$ clients checking for updates or just babbling "home".

          I see a burst of that stuff (PA/FA) , whenever i "open my linux laptop" from sleep, and it tries to resume whatever it did 1h ago , when i closed the lid.

          /Bingo

          If you find my answer useful - Please give the post a šŸ‘ - "thumbs up"

          pfSense+ 23.05.1 (ZFS)

          QOTOM-Q355G4 Quad Lan.
          CPUĀ  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
          LANĀ  : 4 x Intel 211, DiskĀ  : 240G SAMSUNG MZ7L3240HCHQ SSD

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          • johnpozJ Offline
            johnpoz LAYER 8 Global Moderator @bingo600
            last edited by

            @bingo600 yeah but they are outbound, and he says its pfsense IP as source.. Which he is hiding - so assume its the wan public IP? Why would he hide a rfc1918 address.. And its outbound, with those public as destination, so how would that be lan?

            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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            • S Offline
              stiga
              last edited by

              @gertjan
              cat /tmp/rules.debug
              shows me a looooong list of rules and other stuff. I found this too:

              #---------------------------------------------------------------------------

              default deny rules

              #---------------------------------------------------------------------------
              block in log inet all tracker 1000000103 label "Default deny rule IPv4"
              block out log inet all tracker 1000000104 label "Default deny rule IPv4"

              @bingo600
              em1 is the outside interface. I have several network interfaces on the machine.
              I wish I could set the WAN as a alias - and point it to the outside interface been used. :)

              @johnpoz
              Aha!
              So i disabled all the services running.
              I enabled them and let them run for a couple of minutes...
              And as soon as I enabled ntopng - the 1000000104 firewall rule kicked in.

              ntopng - is the reason for these firewall log messages.

              Should they be allowed for the ntopng to function properly?

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              • johnpozJ Offline
                johnpoz LAYER 8 Global Moderator @stiga
                last edited by

                @stiga said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                ntopng - is the reason for these firewall log messages.

                But by default all traffic from firewall is allowed..

                cat /tmp/rules.debug

                pass out  inet all keep state allow-opts ridentifier 1000012115 label "let out anything IPv4 from firewall host itself"
                pass out  inet6 all keep state allow-opts ridentifier 1000012116 label "let out anything IPv6 from firewall host itself"
                

                So to be honest I don't see how those would be blocked, unless the state was killed.

                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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                • bingo600B Offline
                  bingo600 @johnpoz
                  last edited by bingo600

                  @johnpoz

                  I have an Android TV Box , used w. a 23" touchscreen (Giant wall mounted tablet) , for the wifes recipe looking etc.

                  f78c420c-45bd-40ac-8781-7ff878eca03d-image.png

                  It often gives me bursts of the above.

                  The Box is calling back home to G , and then shuts up long enough for the state to time out. Then it tries to resume the same connection , and we have the fwall yelling ....

                  Same goes for my lappy , when i open the lid ...
                  States are timed out , but the lappy doesn't know, and firefox etc just tries to continue where it left.

                  Btw ... How do you show those interface direction triangles ??

                  If you find my answer useful - Please give the post a šŸ‘ - "thumbs up"

                  pfSense+ 23.05.1 (ZFS)

                  QOTOM-Q355G4 Quad Lan.
                  CPUĀ  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
                  LANĀ  : 4 x Intel 211, DiskĀ  : 240G SAMSUNG MZ7L3240HCHQ SSD

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                  • johnpozJ Offline
                    johnpoz LAYER 8 Global Moderator @bingo600
                    last edited by johnpoz

                    @bingo600 said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                    How do you show those interface direction triangles ??

                    https://docs.netgate.com/pfsense/en/latest/monitoring/logs/firewall.html

                    log.jpg

                    They will be shown any time something is blocked in outbound direction.

                    edit: Curious what version of pfsense that is - since current seems to show it like this

                    out.jpg

                    edit: odd that its saying em1 vs wan as well?

                    Your block is normally what you would see when traffic initiated on the lan side of pfsense, since it would be blocked as the traffic enters pfsense.

                    I have a specific outbound rule to block outbound of my wan to rfc1918.. Being a good netizen..

                    rule.jpg

                    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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                    • bingo600B Offline
                      bingo600 @johnpoz
                      last edited by

                      @johnpoz
                      Ahh ... Now i see šŸ‘
                      Outbound block would be either a floating or a purged state.

                      Your RFC1918 has to be a floating, in order to block outbound .. correct ?

                      /Bingo

                      If you find my answer useful - Please give the post a šŸ‘ - "thumbs up"

                      pfSense+ 23.05.1 (ZFS)

                      QOTOM-Q355G4 Quad Lan.
                      CPUĀ  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
                      LANĀ  : 4 x Intel 211, DiskĀ  : 240G SAMSUNG MZ7L3240HCHQ SSD

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                      • johnpozJ Offline
                        johnpoz LAYER 8 Global Moderator @bingo600
                        last edited by johnpoz

                        @bingo600 yeah see my edit, added my rule for clarity. Then forced the log by generating some traffic to some rfc1918 that is not local.

                        what is odd, is the let anything out from the firewall rule should allow the traffic, unless there was no state - maybe the traffic syn went out a different interface - odd why its showing em1 vs wan for example.

                        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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                        • S Offline
                          stiga @johnpoz
                          last edited by

                          @johnpoz

                          Version 2.5.2-RELEASE showing this direction triangle.
                          (I just haven't upgraded yet.. due to uptime ;))

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                          • bingo600B Offline
                            bingo600 @stiga
                            last edited by bingo600

                            @johnpoz
                            @stiga said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                            em1 is the outside interface. I have several network interfaces on the machine.
                            I wish I could set the WAN as a alias - and point it to the outside interface been used. :)

                            I think OP might have multiple WAN IF's

                            So maybe the Syn went astray ...

                            But i fail to see NTOPNG causing that traffic ...
                            Maybe the Akamai (update check) .. But the M$ traffic ???
                            M$ = Github ... Hmmm .... Would they have relocated GH to their ip's ?

                            NTOPNG might put the IF's in promiscius , but it shouldn't cause any influence on states or data

                            If you find my answer useful - Please give the post a šŸ‘ - "thumbs up"

                            pfSense+ 23.05.1 (ZFS)

                            QOTOM-Q355G4 Quad Lan.
                            CPUĀ  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
                            LANĀ  : 4 x Intel 211, DiskĀ  : 240G SAMSUNG MZ7L3240HCHQ SSD

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                            • johnpozJ Offline
                              johnpoz LAYER 8 Global Moderator @bingo600
                              last edited by johnpoz

                              @bingo600 said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                              So maybe the Syn went astray ...

                              That would explain the block, but would bring about the ? of why? If state was on interface X, and then traffic tried to go out Y (where there was no state) that would kick off the default deny.

                              Why would the syn go out X, but at some other point would rest of the traffic try to go out Y?

                              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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                              • bingo600B Offline
                                bingo600 @johnpoz
                                last edited by

                                @johnpoz said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                                @bingo600 said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                                So maybe the Syn went astray ...

                                Why would the syn go out X, but at some other point would rest of the traffic try to go out Y?

                                You're right , and since OP talks about switching , it seems that it is a manual task , to change WAN IF's.

                                If you find my answer useful - Please give the post a šŸ‘ - "thumbs up"

                                pfSense+ 23.05.1 (ZFS)

                                QOTOM-Q355G4 Quad Lan.
                                CPUĀ  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
                                LANĀ  : 4 x Intel 211, DiskĀ  : 240G SAMSUNG MZ7L3240HCHQ SSD

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                                • S Offline
                                  stiga @bingo600
                                  last edited by

                                  I have several interfaces, but they are not in use..
                                  But I only use one interface for "WAN" - I use the em1.

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                                  • S Offline
                                    stiga @stiga
                                    last edited by stiga

                                    This post is deleted!
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                                    • S Offline
                                      stiga @johnpoz
                                      last edited by

                                      @johnpoz
                                      how is rfc1918 defined?

                                      These are mine floating rules.. (for now.. 😊 )

                                      2022-03-28_224554.png

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                                      • johnpozJ Offline
                                        johnpoz LAYER 8 Global Moderator @stiga
                                        last edited by

                                        @stiga said in Default deny rule IPv4 (1000000104) - from Firewall to Internet:

                                        how is rfc1918 defined?

                                        What do you mean?

                                        https://datatracker.ietf.org/doc/html/rfc1918

                                        I just created an alias with the rfc1918 space in it.

                                        I still do not see how that is happening to be honest.. There should be no reason for those rules, because traffic shouldn't be leaving from pfsense out some different interface it didn't create the state via..

                                        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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                                        • S Offline
                                          stiga @johnpoz
                                          last edited by

                                          @johnpoz
                                          I disabled all the interfaces that are not in use.
                                          But still I keep getting these messages;

                                          2022-03-29_095614.png

                                          So only thing is that these stops, when I disable/stopp using ntopng.
                                          (and I have reinstalled ntopng and upgraded pfsense 2.6)

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                                          • johnpozJ Offline
                                            johnpoz LAYER 8 Global Moderator @stiga
                                            last edited by johnpoz

                                            @stiga what is that source IP? Is that your public IP? For this interface?

                                            Are you using any vlans on your em1 interface?

                                            What interface do you have ntop listening on? It shouldn't be even really be on your wan interface - only your lan side.. This is where it will see your devices and what they are talking too...

                                            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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