I need to set an SRV record with a "Port" field of 0 (zero). This is allowed by the spec (RFC 2782), but not possible in the godaddy Domain Manager due to form validation not accepting a "Port" value that is less than 1.
Specifically, I'm setting DNS records to use fastmail for email on my domain using these values. This record pertains to IMAP client auto-discovery. By setting the "Target" field to a single period (.) and the "Port" field to zero (0), it essentially disables IMAP auto-discovery in favour of a separate record for IMAPS (I assume this from reading the spec, fastmail doesn't explain their logic here).
Any assistance or advice would be much appreciated 🙂
Solved! Go to Solution.
In the example below, SRV record Priority 1 and Weight 100 for SIP service with TLS protocol pointed to myserver.domain.tld will be added to the example.com domain.
Execute the command below:
# plesk bin dns --add example.com -srv '' -srv-service sip -srv-target-host myserver.domain.tld. -srv-protocol tls -srv-port 5060 -srv-priority 1 -srv-weight 100
To verify this command can be used
# nslookup -type=SRV _sip._tls.example.com localhost
_sip._tls.example.com service = 1 100 5060 myserver.domain.tld.