How to add a DNS delegation

You cannot edit the reverse of IPv4 /27 blocks nor the IPv6 blocks (/48 - /56 - /64) directly in the console. Therefore, you will have to delegate your subnet to your nameservers. This will delegate the task of propagating the DNS reverses of your IPs on the internet to your servers. You will need two DNS servers for redundancy and can delegate the subnets directly to your account.

Before you start

To complete the actions presented below, you must have:

• A Dedibox account logged into the console
• Created a corresponding A record for your reverse DNS at least 24 hours ago

How to add a DNS delegation in the console

1. From the console, click Server in the top menu, then select Network configuration.

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2. Click the settings icon (cogwheel) next to the relevant IP block, then select Edit nameserver delegation. The Edit nameserver delegation page displays.

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3. Enter details for the two name servers, and click Update delegation.

   Tip

   • You can have a minimum of two and a maximum of five name servers. To add more name servers, use the Add nameserver button.
   • Ensure that your DNS configuration complies with RFC 4183.

   You will need to repeat this for all your /27 IPv4 blocks. For IPv6, once you delegate your /48 all subnets will be automatically configured to the same name servers.

Example BIND configurations

IPv4

Here is an example BIND configuration for the block 62.4.10.0/27:

0-27.10.4.62.in-addr.arpa.     86400   IN      SOA     ns1.mydns.net. hostmaster.mydns.net. (
                                      2013121407     ; Serial
                                      10800   ; Refresh
                                      1800    ; Retry
                                      604800  ; Expire
                                      86400 ) ; Minimum TTL
0-27.10.4.62.in-addr.arpa.     86400   IN      NS      ns1.mydns.net.
0-27.10.4.62.in-addr.arpa.     86400   IN      NS      ns2.mydns.net.
1.0-27.10.4.62.in-addr.arpa.   86400   IN      PTR     toto.domaine.com.

• The line SOA indicates the authoritative server for the IP block,
• The lines NS indicate the propagating DNS servers for the concerned IP block.
• The lines PTR indicate the reverse of the indicated IP, here 62.4.10.1.

IPv6

Here is an example BIND configuration for the zone 001:bc8::3398::/48:

;
; 2001:bc8:3398::/48
;
;
$TTL 1h ; Default TTL
8.9.3.3.8.c.b.0.1.0.0.2.ip6.arpa.       IN      SOA     ns1.domain.fr  webmaster.domain.fr (
        2016071503      ; serial
        1h              ; secondary refresh interval
        15m             ; secondary retry interval
        1w              ; secondary copy expire time
        1h              ; NXDOMAIN cache time
        )

;
; domain name servers
;
@       IN      NS      ns1.domain.fr.
@       IN      NS      ns2.domain.fr.


; IPv6 PTR entries
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.9.3.3.8.c.b.0.1.0.0.2.ip6.arpa.    IN    PTR    toto.domain.fr.