The SOA (Start of Authority) record is a type of DNS record that provides essential information about a DNS zone. Here’s a breakdown of the key parameters associated with an SOA record:
Key SOA Parameters
Zone ID: This is a unique identifier for the DNS zone.
Class: This likely represents an internal classification or identifier used by the DNS management system.
Type: Indicates that this record is a Start of Authority (SOA) record.
Responsible Person: This is the email address of the person or team responsible for managing the DNS zone. Note that in SOA records, the "@" symbol is usually replaced by a dot, but here it is provided in standard email format
Serial:
The serial number of the DNS zone file. It is used to track changes to the zone file. This number should be incremented whenever changes are made to the DNS records .
Retry: The retry interval for secondary DNS servers. It indicates how often secondary servers should retry contacting the primary server if a previous attempt failed.
Refresh:
The refresh interval for secondary DNS servers. It specifies how often secondary servers should check the primary server for updates.
Expire: The expire time for secondary DNS servers. It indicates how long secondary servers should continue to use their cached copy of the zone before discarding it if they can't contact the primary server.
TTL: The Time to Live (TTL) value for DNS records in the zone. This value determines how long DNS records are cached by other DNS servers and clients.