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    Unsolved Troubleshooting Help Requested

    IT Discussion
    centos virtual machine esxi troubleshooting
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    • DustinB3403D
      DustinB3403 @black3dynamite
      last edited by

      @black3dynamite said in Troubleshooting Help Requested:

      Try ping -4 google.com
      It’s probably using ipv6 instead of ipv4

      Will test that in a moment. The restore is going.

      1 Reply Last reply Reply Quote 0
      • DustinB3403D
        DustinB3403 @black3dynamite
        last edited by

        @black3dynamite said in Troubleshooting Help Requested:

        Try ping -4 google.com
        It’s probably using ipv6 instead of ipv4

        No change.

        And the backup from yesterday has no change either. Grr. . . I don't want to rebuild this VM. . . going further back.

        It isn't mission critical either, just irritating.

        1 Reply Last reply Reply Quote 0
        • ObsolesceO
          Obsolesce
          last edited by

          Are you using NetworkManager? If so, turn that shit off.

          DustinB3403D 1 Reply Last reply Reply Quote 0
          • ObsolesceO
            Obsolesce
            last edited by

            Try adding 127.0.0.1 to /etc/resolv.conf

            DustinB3403D 1 Reply Last reply Reply Quote 0
            • DustinB3403D
              DustinB3403 @Obsolesce
              last edited by

              @Obsolesce said in Troubleshooting Help Requested:

              Are you using NetworkManager? If so, turn that shit off.

              Not using NM.

              1 Reply Last reply Reply Quote 0
              • DustinB3403D
                DustinB3403 @Obsolesce
                last edited by

                @Obsolesce said in Troubleshooting Help Requested:

                Try adding 127.0.0.1 to /etc/resolv.conf

                No change with adding the loopback.

                M 1 Reply Last reply Reply Quote 0
                • M
                  manxam @DustinB3403
                  last edited by

                  @DustinB3403 : The fact that you can ping the gateway/router by name and IP makes me suspect it's the firewall.
                  AFAIK, there is nothing on a linux box that would allow it to distinguish between LAN and WAN when performing lookups.

                  scottalanmillerS 1 Reply Last reply Reply Quote 0
                  • scottalanmillerS
                    scottalanmiller @manxam
                    last edited by

                    @manxam said in Troubleshooting Help Requested:

                    @DustinB3403 : The fact that you can ping the gateway/router by name and IP makes me suspect it's the firewall.
                    AFAIK, there is nothing on a linux box that would allow it to distinguish between LAN and WAN when performing lookups.

                    the firewall, OR the default gateway is messed up. Check the routes on the VM.

                    DustinB3403D 1 Reply Last reply Reply Quote 1
                    • DustinB3403D
                      DustinB3403 @scottalanmiller
                      last edited by

                      @scottalanmiller I have 1 route on the VM, and its a mirror image of the route on the working VM, with the exception of the device name, and IP.

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                      • DustinB3403D
                        DustinB3403
                        last edited by

                        Working
                        putty_2019-02-22_15-15-43.png

                        Not Working
                        putty_2019-02-22_15-15-35.png

                        M 1 Reply Last reply Reply Quote 0
                        • M
                          manxam @DustinB3403
                          last edited by

                          @DustinB3403 : Yes, but that doesn't mean the firewall doesn't have a rule (or is a Sonicwall -- see my old post) to block outbound on WAN from that IP.

                          1 Reply Last reply Reply Quote 0
                          • 1
                            1337
                            last edited by 1337

                            Double check mac address so you don't have two VMs with the same. That and conflicting ip addresses can cause some strange effects.

                            1 Reply Last reply Reply Quote 1
                            • jt1001001J
                              jt1001001
                              last edited by

                              Clear arp caches and Mac address tables on your gateway or firewall sounds like a Mac address conflict at the gateway

                              1 Reply Last reply Reply Quote 0
                              • notverypunnyN
                                notverypunny
                                last edited by

                                Just for dirt, try changing the ip assigned to the problem machine and re-initializing the MAC address on the virtual NIC... feels like the edge device is blocking internet access or it's being blackholed on the way out... has anyone been testing content filters or other security solutions on the network?

                                scottalanmillerS 1 Reply Last reply Reply Quote 0
                                • scottalanmillerS
                                  scottalanmiller @notverypunny
                                  last edited by

                                  @notverypunny just for dirt?

                                  Dont know that expression.

                                  notverypunnyN 1 Reply Last reply Reply Quote 0
                                  • SmithErickS
                                    SmithErick
                                    last edited by

                                    NIC card type make a difference here? e1000 vs vmxnet3

                                    1 Reply Last reply Reply Quote 0
                                    • wrx7mW
                                      wrx7m
                                      last edited by

                                      Different VM networks defined on the VM for the host?

                                      DustinB3403D 1 Reply Last reply Reply Quote 0
                                      • notverypunnyN
                                        notverypunny @scottalanmiller
                                        last edited by

                                        @scottalanmiller Yeah... I've never really stopped to think about it, just something that I grew up hearing.....

                                        1 Reply Last reply Reply Quote 0
                                        • DustinB3403D
                                          DustinB3403 @wrx7m
                                          last edited by

                                          @wrx7m said in Troubleshooting Help Requested:

                                          Different VM networks defined on the VM for the host?

                                          No, differents hosts, but the NICs connect to the same lan.

                                          @SmithErick said in Troubleshooting Help Requested:

                                          NIC card type make a difference here? e1000 vs vmxnet3

                                          Different Hosts

                                          @Pete-S said in Troubleshooting Help Requested:

                                          Double check mac address so you don't have two VMs with the same. That and conflicting ip addresses can cause some strange effects.

                                          Already confirmed all of the details, the MAC is unique across the entire network.

                                          1 Reply Last reply Reply Quote 0
                                          • wrx7mW
                                            wrx7m
                                            last edited by

                                            VLANs?

                                            DustinB3403D 1 Reply Last reply Reply Quote 0
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