ML
    • Recent
    • Categories
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    FOG Server IP Keeps Changing in DNS!

    IT Discussion
    8
    42
    4.4k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • S
      Shuey @DustinB3403
      last edited by

      @DustinB3403 No... I think you should slow down and read what I say before you reply, lol. I said "I can still login to the web console no problem"... I'm NOT able to login to the CLI (because my password is failing, not because I can't GET to the CLI :-/...

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

        @Shuey said in FOG Server IP Keeps Changing in DNS!:

        @DustinB3403 No... I think you should slow down and read what I say before you reply, lol. I said "I can still login to the web console no problem"... I'm NOT able to login to the CLI (because my password is failing, not because I can't GET to the CLI :-/...

        Could be, I'm not really paying attention to ML atm.

        1 Reply Last reply Reply Quote 0
        • S
          Shuey
          last edited by

          OK, so I gained access to the CLI again. There doesn't appear to be any DNS servers configured for my Ubuntu server to talk to (even though it can get out to the Internet for updates without any problem, because it at least has a gateway configured).

          This seems to rule out black3dynamite's theory that my Ubuntu server DNS is configured with my DNS server IP...

          Where else should I check for these settings, besides in /etc/network/interfaces ??

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

            @Shuey said in FOG Server IP Keeps Changing in DNS!:

            OK, so I gained access to the CLI again. There doesn't appear to be any DNS servers configured for my Ubuntu server to talk to (even though it can get out to the Internet for updates without any problem, because it at least has a gateway configured).

            This seems to rule out black3dynamite's theory that my Ubuntu server DNS is configured with my DNS server IP...

            Where else should I check for these settings, besides in /etc/network/interfaces ??

            DNS is shown in the file /etc/resolv.conf

            S 1 Reply Last reply Reply Quote 2
            • scottalanmillerS
              scottalanmiller
              last edited by

              If you do an nslookup command, it will show you which DNS server it queried at that time, as well.

              1 Reply Last reply Reply Quote 3
              • S
                Shuey @scottalanmiller
                last edited by

                @scottalanmiller I cat'd my /etc/resolv.conf file and there's nothing in it (except for the default two comment lines).

                I went ahead and added a DNS server and search (nothing was configured previously and I was unable to ping anything by name) and nslookups are working now.

                I've gone so far down this rabbit hole since yesterday that I'm asking myself out of confusion now: "What again does all this have to do with the fact that our AD DNS was changing?" 😄 (especially since I didn't even have DNS configured on the Ubuntu server before this morning)

                scottalanmillerS travisdh1T 2 Replies Last reply Reply Quote 0
                • scottalanmillerS
                  scottalanmiller @Shuey
                  last edited by

                  @Shuey said in FOG Server IP Keeps Changing in DNS!:

                  : "What again does all this have to do with the fact that our AD DNS was changing?" 😄 (especially since I didn't even have DNS configured on the Ubuntu server before this morning)

                  I have no idea how or why we are looking at that other than it just needs to be fixed. The DNS settings on the Ubuntu box are definitely not related to the DNS Server entries.

                  S 1 Reply Last reply Reply Quote 1
                  • S
                    Shuey @scottalanmiller
                    last edited by Shuey

                    @scottalanmiller Cool, at least it's one extra thing that was caught and fixed : )

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

                      @Shuey said in FOG Server IP Keeps Changing in DNS!:

                      @scottalanmiller Cool, at least it's one extra thing that was caught and fixed : )

                      Yeah, might have led to other problems later.

                      1 Reply Last reply Reply Quote 1
                      • travisdh1T
                        travisdh1 @Shuey
                        last edited by

                        @Shuey said in FOG Server IP Keeps Changing in DNS!:

                        @scottalanmiller I cat'd my /etc/resolv.conf file and there's nothing in it (except for the default two comment lines).

                        I went ahead and added a DNS server and search (nothing was configured previously and I was unable to ping anything by name) and nslookups are working now.

                        I've gone so far down this rabbit hole since yesterday that I'm asking myself out of confusion now: "What again does all this have to do with the fact that our AD DNS was changing?" 😄 (especially since I didn't even have DNS configured on the Ubuntu server before this morning)

                        Do you know if you're using network-manager or just networking? Sounds like the proper DNS config settings are missing. Why this STILL happens annoys me to no end. Anyway, fixes.

                        Network Manager

                        nm-tui

                        and edit the network connection.

                        Networking

                        nano /etc/network/interfaces

                        Add the following line with your preferred DNS server IP addresses

                        dns-nameservers 8.8.8.8, 8.8.4.4

                        That's all off the top of my head, so take it with the intended salt.

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

                          Well, after all the things I've done since starting this thread, the IP is holding steady as the correct static IP it should be. I'll double-check one more time on Monday morning, but I have a feeling it's good to go now.

                          1 Reply Last reply Reply Quote 1
                          • DashrenderD
                            Dashrender
                            last edited by

                            Windows DHCP can be setup to register non windows clients with DNS. So if there is an active DHCP lease still in place that might explain why the DHCP IP keeps coming back to DNS.

                            When you "create" your manual DNS entry are you deleting the old one first? Or just changing the original? If you are changing, that might explain why DHCP is able to change it back
                            I would not expect a manual DNS creation to be changeable by normal MS automation.

                            S 1 Reply Last reply Reply Quote 0
                            • S
                              Shuey @Dashrender
                              last edited by

                              @Dashrender Yep, that's how ours is setup, but I've never seen a DHCP lease cause an issue like this :-S. And yep, I completely deleted the DNS entry and verified that the deletion replicated through all servers. That's what had me so confused initially (I kept wondering how the heck it could keep coming back from the dead!).

                              1 Reply Last reply Reply Quote 0
                              • stacksofplatesS
                                stacksofplates
                                last edited by stacksofplates

                                Check and see if dhclient is running. We had an issue like this with some Pi's (with the dhcpcd client). Static address was set but dhcpcd was still pulling an address.

                                Also I didn't see it asked. Is NetworkManager and network both running? That causes issues and it seems distros don't disable one or the other

                                S 1 Reply Last reply Reply Quote 1
                                • S
                                  Shuey @stacksofplates
                                  last edited by

                                  @stacksofplates Yep, sorry, I should've replied back about that previously. network manager is not running; it's not even installed ("nmtui is currently not installed" is the message I got when I tried running it). I also checked to see if a service with the name "dhcp" in the name was running; can't find anything.

                                  stacksofplatesS 1 Reply Last reply Reply Quote 0
                                  • stacksofplatesS
                                    stacksofplates @Shuey
                                    last edited by

                                    @Shuey said in FOG Server IP Keeps Changing in DNS!:

                                    @stacksofplates Yep, sorry, I should've replied back about that previously. network manager is not running; it's not even installed ("nmtui is currently not installed" is the message I got when I tried running it). I also checked to see if a service with the name "dhcp" in the name was running; can't find anything.

                                    Ok. I figured it was worth acting. I haven't noticed the issue with dhclient itself, just dhcpcd.

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

                                      The IP is finally holding steady! Thanks for the feedback guys!

                                      1 Reply Last reply Reply Quote 1
                                      • 1
                                      • 2
                                      • 3
                                      • 2 / 3
                                      • First post
                                        Last post