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dns:what-is-an-soa-record [2015/01/12 20:50] (current)
Jonathan W. created
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 +====== What is an SOA Record? ======
 +An SOA Record is short for Start of Authority. What does that mean? The SOA Record specifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator,​ the domain serial number, and several timers relating to refreshing the zone.
 +Here's an SOA Record example:
 +<​code>#​ dig SOA
 +;; ANSWER SECTION: 86400 IN SOA 2014102407 86400 7200 3600000 86400</​code>​
 +The example shows a dig result for The actual SOA Record is the information following "IN SOA". For this example, the actual SOA Record is:
 +''​ 2014102407 86400 7200 3600000 86400''​
 +  - The primary name server for the domain. //​​
 +  - The responsible '​party'​ for the domain. Typically an email address with the '​@'​ character replaced with a period. //​​
 +  - A timestap that's updated whenever the DNS Zone changes. //​2014102407//​
 +  - The number of seconds before the zone should be refreshed. //​86400// ​
 +  - The number of seconds before a failed refresh should be retried. //7200//
 +  - The upper limit in seconds before a zone is considered no longer authoritative. //3600000//
 +  - The negative result TTL (for example, how long a resolver should consider a negative result for a subdomain to be valid before retrying). //86400//
 +All of these values are the default values set by cPanel.
dns/what-is-an-soa-record.txt · Last modified: 2015/01/12 20:50 by Jonathan W.