Ability to set custom TTL values for custom DNS records

ddavness / power-mailinabox

A Mail-in-a-Box with extra capabilities and more customizability. Not just for power users!

Creative Commons Zero v1.0 Universal

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Ability to set custom TTL values for custom DNS records #28

Closed ddavness closed 3 years ago

ddavness commented 3 years ago

Essentially what the title says; right now all records are published with a TTL of 86400 seconds (1 day), which may be inadequate for some folks relying on the box for Dynamic DNS. There are also the advantages inherent to be able to set the TTL per-record.

Users will not be required to set TTL values if they choose not to. Just leave the TTL field empty and the box will set it for you.

ddavness commented 3 years ago

The caveats here are the following:

The TTL cannot be lower than 30 seconds (many resolvers will not honor lower values anyway);
The TTL cannot be over 30 days (2592000 seconds; some DNS providers actually have a maximum TTL);
Records that do not have an explicit TTL set will carry the default TTL (86400 seconds at the moment). If this value is updated (manually by the user or in future releases), those records will be republished with the new TTL.
Records generated by the box (non-custom) will always have the default TTL;

ddavness commented 3 years ago

The TTL limits will be enforced silently - this is, if the TTL is lower than 30 seconds, it will be bumped to 30 seconds. Likewise, if it is over 30 days, it will be lowered to 30 days.