Redirecting Subdomain to specific Port via DNS
Use case: Hosting multiple minecraft servers on one Server with the same IP.
Therefore you can use SRV-records:
Add a DNS record with the following scheme to at your DNS:
_service._proto.name. TTL class SRV priority weight port target
For example this can look like this:
_minecraft._tcp.sub1. 86400 IN SRV 0 5 5060 sub1.example.com
The service for which you are trying to set up this type of DNS records must support those! (for example Minecraft does)
Some other examples from stackoverflow:
_minecraft._tcp.arboristal.com. 86400 IN SRV 10 40 25565 mc.arboristal.com. _minecraft._tcp.arboristal.com. 86400 IN SRV 10 30 25566 tekkit.arboristal.com. _minecraft._tcp.arboristal.com. 86400 IN SRV 10 30 25567 pvp.arboristal.com.
Sourced partially from stackoverflow.com - Redirect DNS to different ports