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    Unsolved Troubleshooting Help Requested

    IT Discussion
    centos virtual machine esxi troubleshooting
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    • DustinB3403D
      DustinB3403 @travisdh1
      last edited by

      @travisdh1 said in Troubleshooting Help Requested:

      edit: Yes, I've seen networks block distribution mirror sites before. So much fun trying to get those fixed.

      But on the very same network, just a different host nothing is blocked. I could of course look at the firewall to see if something was changed. But if changes were to be made, I think I would've been made aware.

      And every mirror is blocked. It's as though this device itself is blocked.

      1 Reply Last reply Reply Quote 0
      • black3dynamiteB
        black3dynamite
        last edited by

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

        DustinB3403D 2 Replies Last reply Reply Quote 1
        • 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.

                          1 Reply Last reply Reply Quote 0
                          • 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
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