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    Had my pfSense been compromised?

    Scheduled Pinned Locked Moved Firewalling
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    • H
      hulleyrob @provels
      last edited by

      @provels haha yeah is windows phone even a thing anymore? Could be anything i suppose but I’m going to keep a more careful eye on it for a while.

      provelsP 1 Reply Last reply Reply Quote 0
      • provelsP
        provels @hulleyrob
        last edited by provels

        @hulleyrob Glad you asked! I have 2 - 1 Nokia, 1 MS; one for use, one for backup. MS sold 2 and I bought them both! Going on 5 years, same battery, Windows 10, updates monthly. Makes calls and texts, takes pictures, navigation, in-a-pinch Internet, a few apps (not app-happy here). Best $30 (x2) I ever spent. Consumer Cellular, $25/month. I'll stop now.

        Peder

        MAIN - pfSense+ 24.11-RELEASE - Adlink MXE-5401, i7, 16 GB RAM, 64 GB SSD. 500 GB HDD for SyslogNG
        BACKUP - pfSense+ 23.01-RELEASE - Hyper-V Virtual Machine, Gen 1, 2 v-CPUs, 3 GB RAM, 8GB VHDX (Dynamic)

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        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by johnpoz

          514 is syslog, 995 is pop3 ssl, 546 and 547 is dhcpv6... 990 ftps

          WTF why would any devices open those? 445 is smb over tcp.. 389 LDAP

          Those are not unique to windows...But I would be concerned with stuff opening those up... Which is why you never run freaking UPnP... Its was a horrible idea from day one..

          Why not just sniff on your interface for the UPnP ports and see what is hitting them.

          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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          • A
            ASIC
            last edited by

            Hi, I have exactly the same problem - weird incoming connections from the same ip (103.240.140.10). UPnP is disabled. No open WAN ports, no floating rules. Pfsense 2.4.4-RELEASE-p3 (amd64). I googled this IP and realize it has been blacklisted at some places:
            http://sanyalnet-cloud-vps.freeddns.org/mirai-ips.txt
            https://whatismyipaddress.eu/downloads/ip-blacklist.txt
            I have only Windows 7 PC's in my LAN. They all were shut down when this traffic appear. Sorry for my bad English.
            Clipboard01.jpg
            Clipboard02.jpg

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            • provelsP
              provels
              last edited by

              https://www.abuseipdb.com/check/103.240.140.10
              But not why the traffic was passed.

              Peder

              MAIN - pfSense+ 24.11-RELEASE - Adlink MXE-5401, i7, 16 GB RAM, 64 GB SSD. 500 GB HDD for SyslogNG
              BACKUP - pfSense+ 23.01-RELEASE - Hyper-V Virtual Machine, Gen 1, 2 v-CPUs, 3 GB RAM, 8GB VHDX (Dynamic)

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              • johnpozJ
                johnpoz LAYER 8 Global Moderator
                last edited by

                Your not even showing your rule Ids or description. For all we know you have an any any rule on your wan?

                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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                • A
                  ASIC
                  last edited by

                  When I place the mouse over the green check on left on the rule, it shows "pass/0". When I click it opens a popup: "The rule that triggered this action is:" Nothing else.

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                  • A
                    ASIC
                    last edited by

                    Rule description is @4294967295.

                    H B 2 Replies Last reply Reply Quote 0
                    • H
                      hulleyrob @ASIC
                      last edited by hulleyrob

                      Does anyone have an idea where the rule id comes from as it looks like we all have the same rule ID number creating these rules maybe this will give us an idea of where they are coming from?

                      Ideally there would be some logging or history but as everyone has said upnp is a bad idea for most people so i guess thats why it doesnt exist.

                      Also they are also 8 seconds apart in batches but this could be the time that the service runs each time?

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                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by johnpoz

                        So I just turned UPnP on - to test.. And then set my plex to use UPnP vs the static forward I have setup.

                        So I disabled my normal port forward.. Then enable UPnP

                        And I get this.
                        upnp.jpg

                        After doing a can you see me for the port listed in the UPnP status 21735

                        Is not coming up with that ID number.. A google for that ID and pfsense came up with this thread
                        https://forum.netgate.com/topic/128685/firewall-log-showing-strange-pass-entry

                        Can we see the raw firewall logs for these entries. Like in that thread.

                        example - here is the raw entry for one of those passed via upnp

                        Oct 15 06:10:27 	filterlog: 224,0,miniupnpd,0,igb1,match,pass,in,4,0x0,,42,13284,0,DF,6,tcp,60,52.202.215.126,192.168.9.10,58368,32400,0,S,2623792563,,26883,,mss;sackOK;TS;nop;wscale
                        

                        You can see from the log that miniupnpd there.. So lets see the raw for these entries.

                        From that other thread
                        Mar 25 14:42:05 pfSense filterlog: 4294967295,,,0,re0,short,pass,in,4,0x0,,239,10359,0,DF,6,tcp,36,105.212.87.78,[MYIPADDRESS],2123,23,-4,S,errormsg='[bad hdr length 20 - too long, > 16]',

                        Not exactly sure what "short" means as the reason...

                        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

                        H 1 Reply Last reply Reply Quote 0
                        • H
                          hulleyrob @johnpoz
                          last edited by

                          @johnpoz yeah sure i did look at those last night but couldnt see anything that looked much differant from in the screenshot but maybe you will see something i cannot. Will post as soon as i get home from work. Thanks to everyone for input and testing this.

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                          • A
                            ASIC
                            last edited by

                            Here is my raw filter log for this:
                            Oct 14 20:42:00 filterlog: 4294967295,,,0,pppoe0,short,pass,in,4,0x0,,241,53405,0,none,17,udp,27,103.240.140.10,[MYIPADDRESS],1810,1985,7

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

                              @ASIC said in Had my pfSense been compromised?:

                              short,

                              I have no idea what that means... Have never seen that in the logs before.

                              Found this;
                              reason res - the reason that action was taken. Possible reasons are match, bad-offset, fragment, short, normalize, memory, bad-timestamp, congestion, ip-option, proto-cksum, state-mismatch, state-insert, state-limit, src-limit and synproxy.

                              But not sure what "short" actually means?

                              edit: Ok looks there have been some that match on short (2) - but still not actually finding anything that describes what it actually means

                              [2.4.4-RELEASE][admin@sg4860.local.lan]/root: pfctl -s info
                              Status: Enabled for 30 days 22:17:00          Debug: Urgent
                              
                              Interface Stats for igb0              IPv4             IPv6
                                Bytes In                    350478233746         69232705
                                Bytes Out                  1405455628533       1128183040
                                Packets In
                                  Passed                       466867557           311496
                                  Blocked                           8876                1
                                Packets Out
                                  Passed                       999590646          1171599
                                  Blocked                              0                0
                              
                              State Table                          Total             Rate
                                current entries                      404               
                                searches                      3535810440         1323.2/s
                                inserts                         15778842            5.9/s
                                removals                        15778438            5.9/s
                              Counters
                                match                           16542390            6.2/s
                                bad-offset                             0            0.0/s
                                fragment                              64            0.0/s
                                short                                  2            0.0/s
                                normalize                             21            0.0/s
                                memory                                 0            0.0/s
                                bad-timestamp                          0            0.0/s
                                congestion                             0            0.0/s
                                ip-option                            125            0.0/s
                                proto-cksum                            0            0.0/s
                                state-mismatch                      2834            0.0/s
                                state-insert                           0            0.0/s
                                state-limit                            0            0.0/s
                                src-limit                              0            0.0/s
                                synproxy                               0            0.0/s
                                map-failed                             0            0.0/s
                              [2.4.4-RELEASE][admin@sg4860.local.lan]/root: 
                              

                              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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                              • B
                                bchan @ASIC
                                last edited by

                                @ASIC said in Had my pfSense been compromised?:

                                Rule description is @4294967295.

                                Same id as mine.🤔

                                A 1 Reply Last reply Reply Quote 0
                                • A
                                  ASIC @bchan
                                  last edited by

                                  @bchan said in Had my pfSense been compromised?:

                                  4294967295

                                  Maybe because 4294967295(Dec) is equal to FFFFFFFF(Hex).

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

                                    Ok so from research so fare

                                    short packets dropped

                                    Is that that is suppose to mean.. but why does it say passed then?

                                    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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                                    • provelsP
                                      provels
                                      last edited by provels

                                      So there is no outbound traffic to 103.240.140.10 from some device that creates this return Allow temp rule? Since all return traffic is allowed? Create a rule that allows (but logs) all traffic to 103.240.140.10? (LOL, ignore as needed! :)

                                      Peder

                                      MAIN - pfSense+ 24.11-RELEASE - Adlink MXE-5401, i7, 16 GB RAM, 64 GB SSD. 500 GB HDD for SyslogNG
                                      BACKUP - pfSense+ 23.01-RELEASE - Hyper-V Virtual Machine, Gen 1, 2 v-CPUs, 3 GB RAM, 8GB VHDX (Dynamic)

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                                      • johnpozJ
                                        johnpoz LAYER 8 Global Moderator
                                        last edited by

                                        To be honest I think this is log of traffic that IP or transport header is too short.. But not sure why its saying pass... But I don't think that traffic is actually being passed to anything, not even pfsense.

                                        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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                                        • H
                                          hulleyrob
                                          last edited by

                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35606,0,none,17,udp,27,103.240.140.10,IP_REMOVED,3266,990,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35608,0,none,17,udp,27,103.240.140.10,IP_REMOVED,2427,389,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35605,0,none,17,udp,27,103.240.140.10,IP_REMOVED,1862,1025,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35607,0,none,17,udp,27,103.240.140.10,IP_REMOVED,570,995,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35604,0,none,17,udp,27,103.240.140.10,IP_REMOVED,493,514,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35609,0,none,17,udp,27,103.240.140.10,IP_REMOVED,2375,445,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35602,0,none,17,udp,27,103.240.140.10,IP_REMOVED,162,546,7
                                          Oct 13 09:14:13 pfSense filterlog: 4294967295,16777216,,0,pppoe0,short,pass,in,4,0x0,,245,35603,0,none,17,udp,27,103.240.140.10,IP_REMOVED,3871,547,7
                                          

                                          Here are the entries from my log file.

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                                          • johnpozJ
                                            johnpoz LAYER 8 Global Moderator
                                            last edited by

                                            So it seems these are short, ie something wrong with them... But the question is why are they getting logged as passed.. If they are short - they should just be dropped.

                                            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

                                            H 1 Reply Last reply Reply Quote 0
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