Bind updating serial number single dating event
If the checksum changed, the serial has to be updated.
Otherwise the zone file includes the old serial and nothing changed.
So you have to make sure that the zone data in the inventory is the same for all servers.
Also, if you update the servers individually, the serial is generated twice and therefore are different, even when the zone data is identical.
To troubleshoot this process, enable query logging, update logging, xfer in/out logging and notify logging on all DNS Servers that host the zone and verify that the flow of DNS packets described in steps 1-5 can be seen in the logs in the correct order.
You can easily change the IP address of a Domain or host under BIND dns software. Usually, file contains the location for zone file for each domain.
You need to open this file using a text editor such as vi and update the domain / HOST IP including serial number. ( 2007071012 ; Serial yyyymmddnn 3h ; Refresh After 3 hours 1h ; Retry Retry after 1 hour 1w ; Expire after 1 week 1h) ; Minimum negative caching of 1 hour @ 3600 IN NS ns1. @ 3600 IN TXT "v=spf1 mx ~all" @ 3600 IN A 220.127.116.11 IN A 18.104.22.168 ; Serial yyyymmddnn 3h ; Refresh After 3 hours 1h ; Retry Retry after 1 hour 1w ; Expire after 1 week 1h) ; Minimum negative caching of 1 hour @ 3600 IN NS ns1. @ 3600 IN TXT "v=spf1 mx ~all" @ 3600 IN A The author is the creator of nix Craft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting.
In practice this would look like this: , which corresponds the Unix time, assigned to the serial.
This is the simplest way to make sure the serial is numerical and each zone update results in an increased value.