How to redirect DNS to different ports

Question

TL;DR:

DNS resolution of a domain(s) must map to IP:port(s), instead of just IP.

Example,

sub1.example.

Answer 1

Since I had troubles understanding this post here is a simple explanation for people like me. It is useful if:

• You DO NOT need Load Balacing.
• You DO NOT want to use nginx to do port forwarding.
• You DO want to do PORT FORWARDING according to specific subdomains using SRV record.

Then here is what you need to do:

SRV records:

_minecraft._tcp.1.12          IN SRV    1 100 25567 1.12..
_minecraft._tcp.1.13          IN SRV    1 100 25566 1.13..

(I did not need a srv record for 1.14 since my 1.14 minecraft server was already on the 25565 port which is the default port of minecraft.)

And the A records:

1.12                          IN A      
1.13                          IN A      
1.14                          IN A