Updating bind dns records
nsupdate can submit Dynamic DNS Update requests as defined in RFC2136 to a name server, it is provided by “bind-utils” package.
Authentication for DNS updates Transaction signatures (TSIG) can be used to authenticate the Dynamic DNS updates, The only supported encryption algorithm for TSIG is HMAC-MD5.
You need to only make changes on master BIND DNS server.$ORIGIN
allow-notify applies to slave zones only and defines a match list, for example, IP address(es) that are allowed to NOTIFY this server and implicitly update the zone in addition to those hosts defined in the masters option for the zone.
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.
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.
This statement is mutually exclusive with update-policy and applies to master zones only.It doesn't help that the address and pointer records are in different files, which must agree with each other.However, even when you use a tool, it is critical to know what goes on when the files are updated, so we'll start with the manual method.Each change means that zone data files must be modified. Or at least use a tool to increment the serial number for you.
The syntax of zone data files lends itself to making mistakes.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 188.8.131.52 IN A 184.108.40.206 ; 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. I modified the example file to give box an address of 192.168.1.21).