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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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  • J Offline
    J Offline
    joseph
    Staff
    wrote on last edited by
    #8

    @cylon I guess you are using netcup ? netcup makes /etc/resolv.conf as readonly using chattr

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    • C Offline
      C Offline
      cylon
      wrote on last edited by cylon
      #9

      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 1 Reply Last reply
      0
      • 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 Online
        murgeroM Online
        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 Offline
                    scookeS Offline
                    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
                        0
                        • 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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