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The SRV records comply with this format: _service._proto.domain (and some other values here...).

I want to know if anyone has ever used in _proto - tls. TLS is not a transport protocol, so, is it possible to use it there? I know that in _service you can add security, but is it possible on the transport protocol as well?

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  • Are you trying to do TLS on nonstandard ports?
    – NickW
    Mar 18, 2014 at 14:01
  • yes, if I remember correct they are nonstandard.
    – ipinak
    Mar 18, 2014 at 14:59

1 Answer 1

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The SRV record is defined in RFC 2782 and according to that you may locally choose whatever works for you:

Proto The symbolic name of the desired protocol, with an underscore (_) prepended to prevent collisions with DNS labels that occur in nature. _TCP and _UDP are at present the most useful values for this field, though any name defined by Assigned Numbers or locally may be used (as for Service). The Proto is case insensitive.

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