Bind updating serial number

05-Nov-2015 03:37 by google762 3 Comments

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In this configuration BIND9 will find the answer to name queries and remember the answer for the next query. By caching DNS queries, you will reduce bandwidth and (more importantly) latency.

If you intend to serve a registered domain name they ensure that your DNS zone is still available even if your primary server is not online.You can even configure BIND9 to be a Caching and Primary Master DNS server simultaneously, a Caching and a Secondary Master server or even a Caching, Primary Master and Secondary Master server.All that is required is simply combining the different configuration examples.There are also two other common DNS server setups (used when working with zones for registered domain names), Stealth Primary and Stealth Secondary.[[email protected] ansible]$ roles/bind/vars/dns_Examples: roles/bind/vars/dns_-t A -u add -n ns1 -v 172.16.8.246 roles/bind/vars/dns_-t A -u del -n ns1 -v 172.16.8.246 roles/bind/vars/dns_-t CNAME -u add -n ns3 -v ns1.roles/bind/vars/dns_-t CNAME -u del -n ns3 -v ns1.roles/bind/vars/dns_-t PTR -u add -n 172.16.8.246 -v ns1.roles/bind/vars/dns_-t PTR -u del -n 172.16.8.246 -v ns1.[[email protected] ansible]$ roles/bind/vars/dns_-t A -u del -n ns6 -v 172.16.8.253 Updated A records in A.yml: delete 'ns6: 172.16.8.253' You may need to push via Ansible to update the records on DNS Servers [[email protected] ansible]$ roles/bind/vars/dns_-t A -u add -n ns6 -v 172.16.8.251 Updated A records in A.yml: add 'ns6: 172.16.8.251' You may need to push via Ansible to update the records on DNS Servers [[email protected] ansible]$ cat roles/bind/vars/--- A: ns1: 172.16.8.246 ns2: 172.16.8.247 ns4: 172.16.8.249 ns6: 172.16.8.251 [[email protected] ansible]$ cat roles/bind/vars/--- CNAME: www: mail: com ns3: ns1.[[email protected] ansible]$ roles/bind/vars/dns_-t CNAME -u add -n ns7 -v ns6.Updated CNAME records in CNAME.yml: add 'ns7: ns6.heylinux.com' You may need to push via Ansible to update the records on DNS Servers [[email protected] ansible]$ roles/bind/vars/dns_-t PTR -u add -n ns6 -v 172.16.8.251 'ns6' is malformed.Should be a IP address [[email protected] ansible]$ roles/bind/vars/dns_-t PTR -u add -n 172.168.8.251 -v ns6.8.168.172.yml does not exist [[email protected] ansible]$ roles/bind/vars/dns_-t PTR -u add -n 172.16.8.251 -v ns6.Updated PTR records in 8.16.172.yml: add '251: ns6.heylinux.com' You may need to push via Ansible to update the records on DNS Servers [[email protected] ansible]$ ansible-playbook idc2-i hosts -u root -k --tags bind-update PLAY [bind-master] ************************************************************ GATHERING FACTS *************************************************************** ok: [idc2-dong1] TASK: [bind | get zones and A, CNAME records] ********************************** ok: [idc2-dong1] = (item={'domain': '8.16.172.in-addr.arpa', 'file': '8.16.172.zone'}) TASK: [bind | get ansible_dns_new_serial_number of all zones] ***************** ok: [idc2-dong1] TASK: [bind | create zones configuration files] ******************************* changed: [idc2-dong1] = (item={'domain': '8.16.172.in-addr.arpa', 'file': '8.16.172.zone'}) TASK: [bind | reload rndc service to load new records] ************************ changed: [idc2-dong1] PLAY RECAP ******************************************************************** idc2-dong1 : ok=7 changed=3 unreachable=0 failed=0 [[email protected] named]# host ns6 ns6.has address 172.16.8.251 [[email protected] named]# host ns7 ns7.is an alias for ns6.

ns6.has address 172.16.8.251 [[email protected] named]# host 172.16.8.251 251.8.16.172.domain name pointer ns6.

Note: There are some issues with this Howto, too numerable to fix quickly, and it requires bringing up to standard. in all other places, the document uses the machine name example ns.

I'm mentioning this to help anyone to avoid the unnecessary time trying to resolve their DNS, owing the the inconsistencies in this document, particularly if you're new to DNS configuration. Here it changes to box (I believe the author was simply trying to show that additional computers would be listed, but failed to use a different address for box.

I modified the example file to give box an address of 192.168.1.21).

Domain Name Service (DNS) is an Internet service that maps IP addresses and fully qualified domain names (FQDN) to one another.

In this way, DNS alleviates the need to remember IP addresses. Ubuntu ships with BIND (Berkley Internet Naming Daemon), the most widely deployed DNS server.

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