Increasing this value allows remote nameservers to cache the zone information for a longer period of time, reducing the number of queries for the zone and lengthening the amount of time required to proliferate resource record changes. Next, two nameservers are listed as authoritative for the domain. The documentation is unmodified to be compliant with upstream distribution policy.
It is not important whether these nameservers are slaves or if one is a master; they are both still considered authoritative. Neither Cent OS-5 nor the Cent OS Project are in any way affiliated with or sponsored by Red Hat®, Inc.
DNS zone transfer is already working correctly between the master and the slave.
I can log into the slave server and run Now comes the weird part.
This article assumes that you are running BIND on a linux server, that you already have an understanding of what DNS is, the different types of DNS entries, and how DNS works. In this example, we will change the IP address of the ftp.subdomain.
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. The steps to change the A record are rather straightforward. Due to propagation times involved with making DNS changes, you will want to make sure that you only make changes if they are absolutely needed.Each zone file may contain directives and resource records.Directives tell the nameserver to perform tasks or apply special settings to the zone.A guide to dropping the TTL values can be found here. ( 2010090802 ; serial, todays date todays 86400 ; refresh, seconds 7200 ; retry, seconds 3600000 ; expire, seconds 86400 ) ; minimum, seconds === Liquid Web’s Heroic Support is always available to assist customers with this or any other issue.