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    Pfsense get MAC-Adress Manufacturer

    Scheduled Pinned Locked Moved General pfSense Questions
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator @fireodo
      last edited by johnpoz

      @fireodo I believe that db gets populated if you install the nmap package, or possible ntop as well.. Do you have either of those installed, or installed at any point?

      Could be possible other packages populate 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 2.8, 24.11

      fireodoF 1 Reply Last reply Reply Quote 0
      • GertjanG
        Gertjan @fireodo
        last edited by Gertjan

        @fireodo

        Hummm. second time today on the forum that I see MAC + vendor text.

        For myself, I thought it was the arpwatch package.
        Install it, and you'll see :

        851e780b-ebd8-49d5-89b9-4c42a7ea38ab-image.png

        and indeed, I have a 1 Mbytes 'ethercodes.dat' file in the arpwatch folder /usr/local/arpwatch/

        I had to check :

        f55ac3f0-eceb-41a5-bff5-bf4395466f38-image.png

        for an initial download.

        And there was something else .... can't remember. Like placing this / such a file 'else where' so 'pfSense' can use it ....

        No "help me" PM's please. Use the forum, the community will thank you.
        Edit : and where are the logs ??

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

          @gertjan I know nmap does it as well

          I had uninstalled nmap before update to 23.01 - took a look at my dhcp leases, no vendor info.. Installed nmap and shazam vendor info showing up

          installnmap.jpg

          You can also manually update it I believe - because it might be dated? If there is a place to move it too so pfsense sees it without the nmap package that would be good info 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 24.11 | Lab VMs 2.8, 24.11

          1 Reply Last reply Reply Quote 0
          • fireodoF
            fireodo @johnpoz
            last edited by

            @johnpoz said in Pfsense get MAC-Adress Manufacturer:

            Do you have either of those installed, or installed at any point?

            nmap is installed. ntop isnt

            thanks

            Kettop Mi4300YL CPU: i5-4300Y @ 1.60GHz RAM: 8GB Ethernet Ports: 4
            SSD: SanDisk pSSD-S2 16GB (ZFS) WiFi: WLE200NX
            pfsense 2.8.0 CE
            Packages: Apcupsd Cron Iftop Iperf LCDproc Nmap pfBlockerNG RRD_Summary Shellcmd Snort Speedtest System_Patches.

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

              @fireodo have to look in redmine for a feature request, a built in way of getting this info, and having it updated say in a cron like they do bogon list, etc. without having to install a package might be a nice addition.

              Here is a question - if you have both nmap and say arpwatch installed. Seems to place the lists in different places - which one does pfsense use say in the dhcp lease output? Because one might be more up to date than the other, etc.

              @Gertjan you love to look at pfsense code do you not - where does the dhcp lease page look for that vendor info ;)

              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 1
              • GertjanG
                Gertjan
                last edited by

                @johnpoz said in Pfsense get MAC-Adress Manufacturer:

                You can also manually update it I believe - because it might be dated

                Well, arpwatch shows you the cron way to do it.
                The aprwatch package comes with a download shell script.

                I'll drill down into DHCP Leases to see when where this vendor info is added.

                No "help me" PM's please. Use the forum, the community will thank you.
                Edit : and where are the logs ??

                johnpozJ 1 Reply Last reply Reply Quote 2
                • johnpozJ
                  johnpoz LAYER 8 Global Moderator @Gertjan
                  last edited by

                  @gertjan thanks - but might be nice if you didn't have to install any packages to get this info.. when I get a chance later will look in redmine if anyone has put in a feature request.

                  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

                  fireodoF GertjanG 2 Replies Last reply Reply Quote 2
                  • fireodoF
                    fireodo @johnpoz
                    last edited by

                    @johnpoz

                    In the mean time I have done a little "hack" ๐Ÿ˜

                    I located the nmap database in /usr/local/share/nmap/nmap-mac-prefixes

                    made a backup of the original file. After that I took the newest database from:
                    https://svn.nmap.org/nmap/nmap-mac-prefixes
                    and put it in /usr/local/share/nmap

                    and ... it works!!
                    (the "hack" has to be repeated after each update ... ;-)

                    Kettop Mi4300YL CPU: i5-4300Y @ 1.60GHz RAM: 8GB Ethernet Ports: 4
                    SSD: SanDisk pSSD-S2 16GB (ZFS) WiFi: WLE200NX
                    pfsense 2.8.0 CE
                    Packages: Apcupsd Cron Iftop Iperf LCDproc Nmap pfBlockerNG RRD_Summary Shellcmd Snort Speedtest System_Patches.

                    1 Reply Last reply Reply Quote 0
                    • GertjanG
                      Gertjan @johnpoz
                      last edited by Gertjan

                      @johnpoz

                      It need a package.

                      On the "Sastus > DHCP Leases" page you will find :

                      // Load MAC-Manufacturer table
                      $mac_man = load_mac_manufacturer_table();

                      The function load_mac_manufacturer_table() is defined in /etc/inc/pfsense-utils.inc, line 2914.

                      Is this evidence :

                      	if (file_exists("/usr/local/share/nmap/nmap-mac-prefixes")) {
                      		$macs=file("/usr/local/share/nmap/nmap-mac-prefixes");
                      

                      as on my pfSense 23.01 the folder /usr/local/share/nmap/ doesn't exist.
                      And I'm pretty sure it will exist if I install the 'nmap' pfSense package ๐Ÿ˜Š

                      edit : and of course it will exist now - I've installed nmap :

                      # $Id: nmap-mac-prefixes 38424 2022-08-29 19:00:58Z dmiller $ generated with make-mac-prefixes.pl
                      # Original data comes from http://standards.ieee.org/regauth/oui/oui.txt
                      # These values are known as Organizationally Unique Identifiers (OUIs)
                      # See http://standards.ieee.org/faqs/OUI.html
                      # We have added a few unregistered OUIs at the end.
                      000000 Xerox
                      000001 Xerox
                      000002 Xerox
                      000003 Xerox
                      000004 Xerox
                      000005 Xerox
                      000006 Xerox
                      000007 Xerox
                      000008 Xerox
                      000009 Xerox
                      .....
                      

                      The identical file, used by the pfSense Arpwatch package, "ethercodes.dat" uses this format :

                      00:00:00	XEROX CORPORATION
                      00:00:01	XEROX CORPORATION
                      00:00:02	XEROX CORPORATION
                      00:00:03	XEROX CORPORATION
                      00:00:04	XEROX CORPORATION
                      00:00:05	XEROX CORPORATION
                      00:00:06	XEROX CORPORATION
                      00:00:07	XEROX CORPORATION
                      00:00:08	XEROX CORPORATION
                      00:00:09	XEROX CORPORATION
                      00:00:0a	OMRON TATEISI ELECTRONICS CO.
                      

                      and now I have the MAC addresses on the DHCP leases page also polluted with vendor codes, and probably elsewhere.

                      No "help me" PM's please. Use the forum, the community will thank you.
                      Edit : and where are the logs ??

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

                        @gertjan so your saying that dhcp lease page wouldn't load it if arpwatch was used and not nmap?

                        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

                        GertjanG 1 Reply Last reply Reply Quote 0
                        • GertjanG
                          Gertjan @johnpoz
                          last edited by Gertjan

                          @johnpoz

                          My DHCP Leaes page loads just fine for me, never had any issues ( I do not have DNS / unbound issue, I'm resolving ).
                          The question was about the added vendor name info :

                          Arpwatch uses / loads an nearly identical file : the first 6 digits of a all known MAC vendor codes.
                          Arpwatch uses another file format, they add ':' in the MAC addresses - see my post above.

                          To answer the initial question : "Pfsense get MAC-Adress Manufacturer " : install have to install a pfSense called 'nmap' and 'suddenly', on several GUI pages, the vendor name is added to the MAC addresses of our devices.

                          @fireodo said in Pfsense get MAC-Adress Manufacturer:

                          how is pfsense getting the name of the manufacturer of network devices by the MAC-Adress? Is there a build in database?

                          The answer is : install nmap.

                          @johnpoz said in Pfsense get MAC-Adress Manufacturer:

                          but might be nice if you didn't have to install any packages to get this info..

                          I ๐Ÿ‘ that.

                          This would mean that there would be another file that needs to be installed and auto updated ?
                          Like 'bogons' and 'bogons6' and probably more.
                          => another thing that can fail, and has to be supported.

                          The mac vendor code file would will still be present in the packages arpwatch and nmap ...

                          I know where it is now, and Google will help me remembering it ;)

                          No "help me" PM's please. Use the forum, the community will thank you.
                          Edit : and where are the logs ??

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

                            @gertjan yeah no not that it wouldn't load - but that it wouldn't have the vendor info added to the mac address ;)

                            Sounded like the dhcp pages was only looking for the vendor info in the nmap location?

                            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

                            GertjanG 1 Reply Last reply Reply Quote 0
                            • S
                              serbus
                              last edited by

                              Hello!

                              You can always...

                              mkdir /usr/local/share/nmap
                              
                              curl -o /usr/local/share/nmap/nmap-mac-prefixes https://raw.githubusercontent.com/nmap/nmap/master/nmap-mac-prefixes
                              

                              ...at your own risk.

                              John

                              Lex parsimoniae

                              GertjanG 1 Reply Last reply Reply Quote 2
                              • GertjanG
                                Gertjan @johnpoz
                                last edited by Gertjan

                                @johnpoz

                                The DHCP Status page loads the dhcpleases file, and, if it exists, a file with MAC-vendor info. If it finds the file, MAC's are shown with this vendor info. For the file to exist, the pfSense nmap package has to be installed.
                                If this is not the case, then that is no issue at all. You just won't see the vendor info.

                                No "help me" PM's please. Use the forum, the community will thank you.
                                Edit : and where are the logs ??

                                johnpozJ 1 Reply Last reply Reply Quote 0
                                • GertjanG
                                  Gertjan @serbus
                                  last edited by Gertjan

                                  @serbus
                                  Thanks !
                                  Nice clean & lean.

                                  No "help me" PM's please. Use the forum, the community will thank you.
                                  Edit : and where are the logs ??

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

                                    @gertjan hahaha - not sure why having a hard time asking this question..

                                    So it doesn't look at the vendor info that arpwatch adds.. If you have arpwatch package installed, but not nmap - then your dhcp lease table will not list the vendor info ;)

                                    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
                                    • fireodoF
                                      fireodo
                                      last edited by fireodo

                                      Thanks to all for the "Enlightenment" (especially at @serbus for the clean solution)

                                      Wish you a good WeekEnd!

                                      Kettop Mi4300YL CPU: i5-4300Y @ 1.60GHz RAM: 8GB Ethernet Ports: 4
                                      SSD: SanDisk pSSD-S2 16GB (ZFS) WiFi: WLE200NX
                                      pfsense 2.8.0 CE
                                      Packages: Apcupsd Cron Iftop Iperf LCDproc Nmap pfBlockerNG RRD_Summary Shellcmd Snort Speedtest System_Patches.

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                                      • Dobby_D
                                        Dobby_
                                        last edited by Dobby_

                                        @fireodo said in Pfsense get MAC-Adress Manufacturer:

                                        Hi,

                                        just for my curiosity: how is pfsense getting the name of the manufacturer of network devices by the MAC-Adress? Is there a build in database?

                                        Example here:

                                        LAN Interface (lan, igb0)
                                        MAC-Adress xx:0d:xx:4d:aa:c4 - PC Engines GmbH

                                        WIFI Interface (opt1, ath0_wlan0)
                                        MAC-Adress xx:9a:xx:a4:c7:c8 - Apple

                                        (from Status/Interfaces)

                                        Thanks,
                                        fireodo

                                        An OUI {Organizationally Unique Identifier} is a 24-bit number that uniquely identifies a vendor or manufacturer. They are purchased and assigned by the IEEE. The OUI is basically the first three octets of a MAC address.

                                        More information about and well explained

                                        #~. @Dobby

                                        Turris Omnia - 4 Ports - 2 GB RAM / TurrisOS 7 Release (Btrfs)
                                        PC Engines APU4D4 - 4 Ports - 4 GB RAM / pfSense CE 2.7.2 Release (ZFS)
                                        PC Engines APU6B4 - 4 Ports - 4 GB RAM / pfSense+ (Plus) 24.03_1 Release (ZFS)

                                        1 Reply Last reply Reply Quote 1
                                        • S
                                          serbus
                                          last edited by

                                          Hello!

                                          As far as I can tell, the current pfsense code doesnt parse or use the nmap-mac-prefixes file correctly - you might see "Ieee Registration Authority" listed when there is actually more detailed ownership info in the file. Its not that what it displays sometimes is completely wrong (maybe), but it could be more right (definitely), and it burns resources without being better.

                                          I think hw mac ownership checking would need some love to become more accurate and informative. Personally, its one of the first things I look at when I ask, "Who/what is that hooking up to my network?!?!". It would also be nice if it highlighted LAAs.

                                          Redmine references

                                          John

                                          Lex parsimoniae

                                          fireodoF 1 Reply Last reply Reply Quote 1
                                          • fireodoF
                                            fireodo @serbus
                                            last edited by fireodo

                                            @serbus

                                            Hi,

                                            I took the script that is referenced in this Redmine and I can say its working well - the results are valid. Thanks again for pointing there!

                                            Edit: The oui database Url has slightly changed from:

                                            http://standards.ieee.org/develop/regauth/oui/oui.txt

                                            to:

                                            https://standards-oui.ieee.org/oui/oui.txt

                                            So if someone wants to use the script maybe make also this change.

                                            Regards,
                                            fireodo

                                            Kettop Mi4300YL CPU: i5-4300Y @ 1.60GHz RAM: 8GB Ethernet Ports: 4
                                            SSD: SanDisk pSSD-S2 16GB (ZFS) WiFi: WLE200NX
                                            pfsense 2.8.0 CE
                                            Packages: Apcupsd Cron Iftop Iperf LCDproc Nmap pfBlockerNG RRD_Summary Shellcmd Snort Speedtest System_Patches.

                                            GertjanG 1 Reply Last reply Reply Quote 1
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