network issue after using macchanger. no internet, no ipv4












0















I used macchanger with these commands:



sudo ifconfig eth0 down
sudo macchanger -r eth0
sudo ifconfig eth0 up


I am using it with virtualbox on a local network, I've never had issue with that before, however now once I do that I lose internet.



the issue goes away when I reboot the machine as the MAC address reset to default. tried to reboot the router also, and my Linux works perfectly fine until I reset its MAC address.



ifconfig shows no ipv4 for eth0, restarting network-manager does not help. either.



Troubleshooting done without success :



Tried different hardware: computer, router and fresh install of
virtualbox and Kali.



Tried to use the older version of virtualbox.



service network-manager restart, macchanger -e -r, dhclient eth0.



Changed /etc/network/interfaces for eth0 with dhcp then for oreth0 static.



Tried different network settings on virtualbox.



Checked the firewall disabled local and gateway.



Reinstalled network-manager.



ping 8.8.8.8 return " this site can't be reached".










share|improve this question













migrated from security.stackexchange.com Jan 21 at 6:32


This question came from our site for information security professionals.














  • 1





    Hey Benjy - More info would help. Is this on a local network behind a home router, corporate network or directly connected to a DOCSIS cable modem? Regardless have you restarted the next hop in the network?

    – Joe M
    Jan 20 at 6:56
















0















I used macchanger with these commands:



sudo ifconfig eth0 down
sudo macchanger -r eth0
sudo ifconfig eth0 up


I am using it with virtualbox on a local network, I've never had issue with that before, however now once I do that I lose internet.



the issue goes away when I reboot the machine as the MAC address reset to default. tried to reboot the router also, and my Linux works perfectly fine until I reset its MAC address.



ifconfig shows no ipv4 for eth0, restarting network-manager does not help. either.



Troubleshooting done without success :



Tried different hardware: computer, router and fresh install of
virtualbox and Kali.



Tried to use the older version of virtualbox.



service network-manager restart, macchanger -e -r, dhclient eth0.



Changed /etc/network/interfaces for eth0 with dhcp then for oreth0 static.



Tried different network settings on virtualbox.



Checked the firewall disabled local and gateway.



Reinstalled network-manager.



ping 8.8.8.8 return " this site can't be reached".










share|improve this question













migrated from security.stackexchange.com Jan 21 at 6:32


This question came from our site for information security professionals.














  • 1





    Hey Benjy - More info would help. Is this on a local network behind a home router, corporate network or directly connected to a DOCSIS cable modem? Regardless have you restarted the next hop in the network?

    – Joe M
    Jan 20 at 6:56














0












0








0








I used macchanger with these commands:



sudo ifconfig eth0 down
sudo macchanger -r eth0
sudo ifconfig eth0 up


I am using it with virtualbox on a local network, I've never had issue with that before, however now once I do that I lose internet.



the issue goes away when I reboot the machine as the MAC address reset to default. tried to reboot the router also, and my Linux works perfectly fine until I reset its MAC address.



ifconfig shows no ipv4 for eth0, restarting network-manager does not help. either.



Troubleshooting done without success :



Tried different hardware: computer, router and fresh install of
virtualbox and Kali.



Tried to use the older version of virtualbox.



service network-manager restart, macchanger -e -r, dhclient eth0.



Changed /etc/network/interfaces for eth0 with dhcp then for oreth0 static.



Tried different network settings on virtualbox.



Checked the firewall disabled local and gateway.



Reinstalled network-manager.



ping 8.8.8.8 return " this site can't be reached".










share|improve this question














I used macchanger with these commands:



sudo ifconfig eth0 down
sudo macchanger -r eth0
sudo ifconfig eth0 up


I am using it with virtualbox on a local network, I've never had issue with that before, however now once I do that I lose internet.



the issue goes away when I reboot the machine as the MAC address reset to default. tried to reboot the router also, and my Linux works perfectly fine until I reset its MAC address.



ifconfig shows no ipv4 for eth0, restarting network-manager does not help. either.



Troubleshooting done without success :



Tried different hardware: computer, router and fresh install of
virtualbox and Kali.



Tried to use the older version of virtualbox.



service network-manager restart, macchanger -e -r, dhclient eth0.



Changed /etc/network/interfaces for eth0 with dhcp then for oreth0 static.



Tried different network settings on virtualbox.



Checked the firewall disabled local and gateway.



Reinstalled network-manager.



ping 8.8.8.8 return " this site can't be reached".







networking ip mac-address dhcp






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Jan 20 at 6:12







Benji











migrated from security.stackexchange.com Jan 21 at 6:32


This question came from our site for information security professionals.









migrated from security.stackexchange.com Jan 21 at 6:32


This question came from our site for information security professionals.










  • 1





    Hey Benjy - More info would help. Is this on a local network behind a home router, corporate network or directly connected to a DOCSIS cable modem? Regardless have you restarted the next hop in the network?

    – Joe M
    Jan 20 at 6:56














  • 1





    Hey Benjy - More info would help. Is this on a local network behind a home router, corporate network or directly connected to a DOCSIS cable modem? Regardless have you restarted the next hop in the network?

    – Joe M
    Jan 20 at 6:56








1




1





Hey Benjy - More info would help. Is this on a local network behind a home router, corporate network or directly connected to a DOCSIS cable modem? Regardless have you restarted the next hop in the network?

– Joe M
Jan 20 at 6:56





Hey Benjy - More info would help. Is this on a local network behind a home router, corporate network or directly connected to a DOCSIS cable modem? Regardless have you restarted the next hop in the network?

– Joe M
Jan 20 at 6:56










3 Answers
3






active

oldest

votes


















1














Try to edit directly on network-manager:

Right click on




Network-Manager -> Edit Connections -> Choose the adapter "wifi or wired" -> ...




...then edit the MAC ADDRESS of the adapter selected.

If it worked, please feedback to us.






share|improve this answer

































    0














    Ideas:




    • If you're fresh install is actually clean from the distro, then it makes me think your wifi password is bad (if on wlan) or you have a wiring/switch/gateway issue.

    • If you're chaining your mac, it makes me think you're on a VM with a virtual switch to your host. Confirm from your host that you have connectivity to the wan. ping 8.8.8.8 or ping 4.2.2.1 to see if you can reach out.

    • Sounds like there may be a layer 2 access control at the gateway/switch. Login if you have creds and confirm that there isn't a mac whitelist in place.

    • Check your local/network firewall. Try disabling the local and/or gateway firewall for a quick second to see if the problem goes away.

    • There could be a packet MTU setting issue, but that is not very likely. Steps to troubleshoot that would be a bit advanced.

    • If you also control the gateway/switch, try resetting them as well. You're clearly willing to blow away your box to fix this, so maybe you'd be willing to reset them as well.

    • Look into which services your flavor of *nix needs for networking. Example: https://theos.in/desktop-linux/tip-that-matters/how-do-i-restart-linux-network-service/. It could be that one of these services was disabled, and needs to be enabled.






    share|improve this answer
























    • Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

      – waymobetta
      Jan 20 at 7:28











    • Hence the assumption on line 4...

      – primohacker
      Jan 20 at 7:35











    • OP does not have an IP - that makes half of your suggestions unworkable

      – schroeder
      Jan 20 at 13:56



















    0














    It seems you can't address your NIC through eth0 because of the MAC address is 00:00:00:00:00:00 isn't it ?
    You can't save any configuration for your nic, you can't use it, that's why you have the same problem using a different Linux distribution.
    It's a hardware problem i'm afraid, not software






    share|improve this answer























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      3 Answers
      3






      active

      oldest

      votes








      3 Answers
      3






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      1














      Try to edit directly on network-manager:

      Right click on




      Network-Manager -> Edit Connections -> Choose the adapter "wifi or wired" -> ...




      ...then edit the MAC ADDRESS of the adapter selected.

      If it worked, please feedback to us.






      share|improve this answer






























        1














        Try to edit directly on network-manager:

        Right click on




        Network-Manager -> Edit Connections -> Choose the adapter "wifi or wired" -> ...




        ...then edit the MAC ADDRESS of the adapter selected.

        If it worked, please feedback to us.






        share|improve this answer




























          1












          1








          1







          Try to edit directly on network-manager:

          Right click on




          Network-Manager -> Edit Connections -> Choose the adapter "wifi or wired" -> ...




          ...then edit the MAC ADDRESS of the adapter selected.

          If it worked, please feedback to us.






          share|improve this answer















          Try to edit directly on network-manager:

          Right click on




          Network-Manager -> Edit Connections -> Choose the adapter "wifi or wired" -> ...




          ...then edit the MAC ADDRESS of the adapter selected.

          If it worked, please feedback to us.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Jan 22 at 22:37









          zx485

          943813




          943813










          answered Jan 22 at 16:46









          Mahanb HamanandaMahanb Hamananda

          112




          112

























              0














              Ideas:




              • If you're fresh install is actually clean from the distro, then it makes me think your wifi password is bad (if on wlan) or you have a wiring/switch/gateway issue.

              • If you're chaining your mac, it makes me think you're on a VM with a virtual switch to your host. Confirm from your host that you have connectivity to the wan. ping 8.8.8.8 or ping 4.2.2.1 to see if you can reach out.

              • Sounds like there may be a layer 2 access control at the gateway/switch. Login if you have creds and confirm that there isn't a mac whitelist in place.

              • Check your local/network firewall. Try disabling the local and/or gateway firewall for a quick second to see if the problem goes away.

              • There could be a packet MTU setting issue, but that is not very likely. Steps to troubleshoot that would be a bit advanced.

              • If you also control the gateway/switch, try resetting them as well. You're clearly willing to blow away your box to fix this, so maybe you'd be willing to reset them as well.

              • Look into which services your flavor of *nix needs for networking. Example: https://theos.in/desktop-linux/tip-that-matters/how-do-i-restart-linux-network-service/. It could be that one of these services was disabled, and needs to be enabled.






              share|improve this answer
























              • Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

                – waymobetta
                Jan 20 at 7:28











              • Hence the assumption on line 4...

                – primohacker
                Jan 20 at 7:35











              • OP does not have an IP - that makes half of your suggestions unworkable

                – schroeder
                Jan 20 at 13:56
















              0














              Ideas:




              • If you're fresh install is actually clean from the distro, then it makes me think your wifi password is bad (if on wlan) or you have a wiring/switch/gateway issue.

              • If you're chaining your mac, it makes me think you're on a VM with a virtual switch to your host. Confirm from your host that you have connectivity to the wan. ping 8.8.8.8 or ping 4.2.2.1 to see if you can reach out.

              • Sounds like there may be a layer 2 access control at the gateway/switch. Login if you have creds and confirm that there isn't a mac whitelist in place.

              • Check your local/network firewall. Try disabling the local and/or gateway firewall for a quick second to see if the problem goes away.

              • There could be a packet MTU setting issue, but that is not very likely. Steps to troubleshoot that would be a bit advanced.

              • If you also control the gateway/switch, try resetting them as well. You're clearly willing to blow away your box to fix this, so maybe you'd be willing to reset them as well.

              • Look into which services your flavor of *nix needs for networking. Example: https://theos.in/desktop-linux/tip-that-matters/how-do-i-restart-linux-network-service/. It could be that one of these services was disabled, and needs to be enabled.






              share|improve this answer
























              • Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

                – waymobetta
                Jan 20 at 7:28











              • Hence the assumption on line 4...

                – primohacker
                Jan 20 at 7:35











              • OP does not have an IP - that makes half of your suggestions unworkable

                – schroeder
                Jan 20 at 13:56














              0












              0








              0







              Ideas:




              • If you're fresh install is actually clean from the distro, then it makes me think your wifi password is bad (if on wlan) or you have a wiring/switch/gateway issue.

              • If you're chaining your mac, it makes me think you're on a VM with a virtual switch to your host. Confirm from your host that you have connectivity to the wan. ping 8.8.8.8 or ping 4.2.2.1 to see if you can reach out.

              • Sounds like there may be a layer 2 access control at the gateway/switch. Login if you have creds and confirm that there isn't a mac whitelist in place.

              • Check your local/network firewall. Try disabling the local and/or gateway firewall for a quick second to see if the problem goes away.

              • There could be a packet MTU setting issue, but that is not very likely. Steps to troubleshoot that would be a bit advanced.

              • If you also control the gateway/switch, try resetting them as well. You're clearly willing to blow away your box to fix this, so maybe you'd be willing to reset them as well.

              • Look into which services your flavor of *nix needs for networking. Example: https://theos.in/desktop-linux/tip-that-matters/how-do-i-restart-linux-network-service/. It could be that one of these services was disabled, and needs to be enabled.






              share|improve this answer













              Ideas:




              • If you're fresh install is actually clean from the distro, then it makes me think your wifi password is bad (if on wlan) or you have a wiring/switch/gateway issue.

              • If you're chaining your mac, it makes me think you're on a VM with a virtual switch to your host. Confirm from your host that you have connectivity to the wan. ping 8.8.8.8 or ping 4.2.2.1 to see if you can reach out.

              • Sounds like there may be a layer 2 access control at the gateway/switch. Login if you have creds and confirm that there isn't a mac whitelist in place.

              • Check your local/network firewall. Try disabling the local and/or gateway firewall for a quick second to see if the problem goes away.

              • There could be a packet MTU setting issue, but that is not very likely. Steps to troubleshoot that would be a bit advanced.

              • If you also control the gateway/switch, try resetting them as well. You're clearly willing to blow away your box to fix this, so maybe you'd be willing to reset them as well.

              • Look into which services your flavor of *nix needs for networking. Example: https://theos.in/desktop-linux/tip-that-matters/how-do-i-restart-linux-network-service/. It could be that one of these services was disabled, and needs to be enabled.







              share|improve this answer












              share|improve this answer



              share|improve this answer










              answered Jan 20 at 7:07









              primohackerprimohacker

              7619




              7619













              • Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

                – waymobetta
                Jan 20 at 7:28











              • Hence the assumption on line 4...

                – primohacker
                Jan 20 at 7:35











              • OP does not have an IP - that makes half of your suggestions unworkable

                – schroeder
                Jan 20 at 13:56



















              • Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

                – waymobetta
                Jan 20 at 7:28











              • Hence the assumption on line 4...

                – primohacker
                Jan 20 at 7:35











              • OP does not have an IP - that makes half of your suggestions unworkable

                – schroeder
                Jan 20 at 13:56

















              Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

              – waymobetta
              Jan 20 at 7:28





              Changing the MAC address for purposes of spoofing another user's MAC to bypass certain access controls might be one reason

              – waymobetta
              Jan 20 at 7:28













              Hence the assumption on line 4...

              – primohacker
              Jan 20 at 7:35





              Hence the assumption on line 4...

              – primohacker
              Jan 20 at 7:35













              OP does not have an IP - that makes half of your suggestions unworkable

              – schroeder
              Jan 20 at 13:56





              OP does not have an IP - that makes half of your suggestions unworkable

              – schroeder
              Jan 20 at 13:56











              0














              It seems you can't address your NIC through eth0 because of the MAC address is 00:00:00:00:00:00 isn't it ?
              You can't save any configuration for your nic, you can't use it, that's why you have the same problem using a different Linux distribution.
              It's a hardware problem i'm afraid, not software






              share|improve this answer




























                0














                It seems you can't address your NIC through eth0 because of the MAC address is 00:00:00:00:00:00 isn't it ?
                You can't save any configuration for your nic, you can't use it, that's why you have the same problem using a different Linux distribution.
                It's a hardware problem i'm afraid, not software






                share|improve this answer


























                  0












                  0








                  0







                  It seems you can't address your NIC through eth0 because of the MAC address is 00:00:00:00:00:00 isn't it ?
                  You can't save any configuration for your nic, you can't use it, that's why you have the same problem using a different Linux distribution.
                  It's a hardware problem i'm afraid, not software






                  share|improve this answer













                  It seems you can't address your NIC through eth0 because of the MAC address is 00:00:00:00:00:00 isn't it ?
                  You can't save any configuration for your nic, you can't use it, that's why you have the same problem using a different Linux distribution.
                  It's a hardware problem i'm afraid, not software







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Jan 20 at 17:26







                  LoryOne





































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