Updating zone file serial number convention


16-Jul-2018 06:24

Net:: DNS:: Update is a subclass of Net:: DNS:: Packet used to create dynamic update requests.

Net:: DNS:: Header objects represent the header section of a DNS packet.

See the manual pages listed above for other class-specific methods.

# Use a default resolver -- can not get an error string this way.

The TTL value can be set from one to several hours, if you are not planning any changes to your domain's DNS records in the meantime.

A zone file may be either a DNS master file, authoritatively describing a zone, or it may be used to list the contents of a DNS cache.

; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS localhost. This can be done by adding the ;; ANSWER SECTION: 4.240.123.224.

@ IN A 127.0.0.1 ; ; BIND reverse data file for local loopback interface ; $TTL 604800 @ IN SOA localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS localhost.

Resources and further reading: Albitz01, DNShowto, BINDfaq. From version 9.9 of the BIND software secondary server zone files are by default saved in raw binary format instead of text format.

Candidates should be able to create a zone file for a forward or reverse zone and hints for root level servers. Reading and checking these files can be a bit more challenging because of this.

NSD, Power DNS) are using the zone files only as a starting point to compile them into database format, see also Microsoft DNS with Active Directory-database integration.