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  3. how to change DNS settings of my server ?

how to change DNS settings of my server ?

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dns
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  • C cylon

    no I'm using time4vps.

    I tried edit the file /etc/systemd/resolve.conf with this:

    [Resolve] 
    DNS=9.9.9.9 9.9.9.10
    

    but it doesn't seem to work.

    Is there something else I should do? I don't really understand the unbound DNS configuration in this doc: https://docs.cloudron.io/networking/#dns

    murgeroM Offline
    murgeroM Offline
    murgero
    App Dev
    wrote on last edited by
    #10

    @cylon You might need to restart the systemd service that handles your DNS if it's not the one documented by cloudron

    --
    https://urgero.org
    ~ Professional Nerd. Freelance Programmer. ~

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    • C Offline
      C Offline
      cylon
      wrote on last edited by cylon
      #11

      I did restart systemd-resolved service but doesn't seem to work.
      After doing so the content of /etc/resolv.conf is :

      # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)      
      #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN             
      # 127.0.0.53 is the systemd-resolved stub resolver.                                 
                                                                                          
      nameserver 212.24.109.143                                                           
      nameserver 80.208.225.143 
      

      Shouldn't it be 9.9.9.9 as specified in the /etc/systemd/resolve.conf file ?

      #  This file is part of systemd.                                                    
      #                                                                                   
      #  systemd is free software; you can redistribute it and/or modify it under the     
      #  terms of the GNU Lesser General Public License as published by the Free          
      #  Software Foundation; either version 2.1 of the License, or (at your option)      
      #  any later version.                                                               
      #                                                                                   
      # Entries in this file show the compile time defaults. Local configuration          
      # should be created by either modifying this file, or by creating "drop-ins" in     
      # the resolved.conf.d/ subdirectory. The latter is generally recommended.           
      # Defaults can be restored by simply deleting this file and all drop-ins.           
      #                                                                                   
      # Use 'systemd-analyze cat-config systemd/resolved.conf' to display the full config.
      #                                                                                   
      # See resolved.conf(5) for details.                                                 
                                                                                          
      [Resolve]                                                                                                                           
      DNS=9.9.9.9 9.9.9.10                                                                
      

      Cloudron doc says All apps and services use systemd-resolved for name resolution. You can configure systemctl-resolved as required by your network
      So the above should have work isn't it ?

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      • J Offline
        J Offline
        joseph
        Staff
        wrote on last edited by
        #12

        @cylon systemd-resolved run on 127.0.0.53 . So, you have to also change /etc/resolv.conf to be nameserver 127.0.0.53 .

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        • C Offline
          C Offline
          cylon
          wrote on last edited by
          #13

          How do I do that ? If I change the file /etc/resolv.conf to add the line

          nameserver 127.0.0.53
          

          It get overwritten at reboot and the line is deleted

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          • C Offline
            C Offline
            cylon
            wrote on last edited by cylon
            #14

            I tried to changed the /etc/unbound/unbound.conf.d/cloudron-network.conf adding this:

            # Forward all DNS queries to Quad9 DNS                                              
            forward-zone:                                                                       
                    name: "."                                                                   
                    forward-addr: 9.9.9.9                                                       
                    forward-addr: 149.112.112.112 
            

            but request are still going to 212.24.109.143 and not 9.9.9.9

            what service is managing the /etc/resolve.conf file ?

            here are all my files:
            /etc/systemd/resolved.conf:

            #  This file is part of systemd.                                                    
            #                                                                                   
            #  systemd is free software; you can redistribute it and/or modify it under the     
            #  terms of the GNU Lesser General Public License as published by the Free          
            #  Software Foundation; either version 2.1 of the License, or (at your option)      
            #  any later version.                                                               
            #                                                                                   
            # Entries in this file show the compile time defaults. Local configuration          
            # should be created by either modifying this file, or by creating "drop-ins" in     
            # the resolved.conf.d/ subdirectory. The latter is generally recommended.           
            # Defaults can be restored by simply deleting this file and all drop-ins.           
            #                                                                                   
            # Use 'systemd-analyze cat-config systemd/resolved.conf' to display the full config.
            #                                                                                   
            # See resolved.conf(5) for details.                                                 
                                                                                                
            [Resolve]                                                                                       
            DNS=9.9.9.9 9.9.9.10
            

            /etc/resolv.conf:

            # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)      
            #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN             
            # 127.0.0.53 is the systemd-resolved stub resolver.                                 
                                                                                                
            nameserver 212.24.109.143                                                           
            nameserver 80.208.225.143
            

            /run/systemd/resolve/resolv.conf:

            # This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).      
            # Do not edit.                                                                      
            #                                                                                   
            # This file might be symlinked as /etc/resolv.conf. If you're looking at            
            # /etc/resolv.conf and seeing this text, you have followed the symlink.             
            #                                                                                   
            # This is a dynamic resolv.conf file for connecting local clients directly to       
            # all known uplink DNS servers. This file lists all configured search domains.      
            #                                                                                   
            # Third party programs should typically not access this file directly, but only     
            # through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a        
            # different way, replace this symlink by a static file or a different symlink.      
            #                                                                                   
            # See man:systemd-resolved.service(8) for details about the supported modes of      
            # operation for /etc/resolv.conf.                                                   
                                                                                                
            nameserver 9.9.9.9                                                                  
            nameserver 9.9.9.10                                                                 
            search . 
            

            Running resolvectl status yield:

            Global                                                                              
                   Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported                    
            resolv.conf mode: foreign                                                           
                 DNS Servers: 9.9.9.9 9.9.9.10                                                  
                                                                                                
            Link 2 (ens3)                                                                       
            Current Scopes: none                                                                
                 Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported        
                                                                                                
            Link 3 (docker0)                                                                    
            Current Scopes: none                                                                
                 Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported        
                                                                                                
            Link 4 (br-e8030366a286)                                                            
            Current Scopes: none                                                                
                 Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported        
                                                                                                
            Link 6 (veth13a1cdd)                                                                
            Current Scopes: none                                                                
                 Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported        
                                                                                                
            Link 8 (vethf77db43)                                                                
            Current Scopes: none                                                                
                 Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverT
            

            showing that resolv.conf is in mode: foreign

            what service manage resolv.conf in cloudron ?

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            • girishG girish marked this topic as a question on
            • girishG Offline
              girishG Offline
              girish
              Staff
              wrote on last edited by
              #15

              @cylon there's much to unwrap. Unfortunately, the way all these things interact is quite complicated.

              Before I say anything, are you on Cloudron 8? I am wonder why you have your /etc/resolv.conf handled by resolvconf ? Cloudron 8 has removed this package. If you are still on some < v8, I recommend upgrading first because the instructions to change the DNS are different.

              For Cloudron 8, here is a checklist:

              • Make sure resolvconf package is not there . We don't install this anymore intentionally. apt remove resolvconf
              • /etc/resolv.conf must be a symlink to ../run/systemd/resolve/stub-resolv.conf
              • systemctl status systemd-resolved must be enabled
              • Finally, /etc/systemd/resolved.conf has your preferred DNS servers (quad9 in your case).

              That should be it. After that, host www.cloudron.io should work out of the box.

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              • scookeS Online
                scookeS Online
                scooke
                wrote on last edited by
                #16

                I used to use Time4VPS and thoroughly enjoyed it. Did you check these out?:
                https://www.time4vps.com/knowledgebase/working-with-dns-manager/
                https://www.time4vps.com/knowledgebase/create-nameserver-with-your-domain/

                A life lived in fear is a life half-lived

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                • C Offline
                  C Offline
                  cylon
                  wrote on last edited by
                  #17

                  I'm still indeed on v7, but I can't update to v8 😞
                  https://forum.cloudron.io/post/93010

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                  • girishG Offline
                    girishG Offline
                    girish
                    Staff
                    wrote on last edited by
                    #18

                    @cylon for v7, cloudron uses unbound. For Cloudron 7, please check this:

                    • /etc/resolv.conf should have nameserver 127.0.0.1
                    • systemctl status unbound should say running
                    • host www.cloudron.io 127.0.0.1 should work

                    systemd-resolved is not used at all. So, you can ignore all those related threads and configs. I would like to understand how it got to this state though? Do you think it tried to upgrade to v8 and end it up in this state?

                    C 1 Reply Last reply
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                    • C Offline
                      C Offline
                      cylon
                      wrote on last edited by
                      #19

                      thanks for the help, but this is not urgent, I can wait for the update to the v8 so I won't have to do this change twice 🙂

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                      • girishG girish

                        @cylon for v7, cloudron uses unbound. For Cloudron 7, please check this:

                        • /etc/resolv.conf should have nameserver 127.0.0.1
                        • systemctl status unbound should say running
                        • host www.cloudron.io 127.0.0.1 should work

                        systemd-resolved is not used at all. So, you can ignore all those related threads and configs. I would like to understand how it got to this state though? Do you think it tried to upgrade to v8 and end it up in this state?

                        C Offline
                        C Offline
                        cylon
                        wrote on last edited by
                        #20

                        @girish said in how to change DNS settings of my server ?:

                        systemd-resolved is not used at all. So, you can ignore all those related threads and configs. I would like to understand how it got to this state though? Do you think it tried to upgrade to v8 and end it up in this state?

                        That's possible, I don't remember if I first tried to upgrade to v8 or to change the DNS

                        I updated the /etc/systemd/resolve.conf and only after did I check the /etc/resolv/conf file, I don't know what state it was before I updated /etc/systemd/resolve.conf

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                        • girishG Offline
                          girishG Offline
                          girish
                          Staff
                          wrote on last edited by
                          #21

                          Fixed in support as outlined in https://forum.cloudron.io/topic/12300/how-to-change-dns-settings-of-my-server/18

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