DNS Records: Forwarding a port on my public domain

I've set up an MX record for a local mailserver before, but I've never done this...

I want to set up my public domain (registered by Dreamhost) to accept IPP (Internet Printing Protocol) jobs and send them to the IPP LaserJet printer on my home LAN. IPP uses port 631.

What do I put in my DNS records?

Answer

DNS doesn't do anything with ports, it's strictly for mapping names to IP addresses. What you need to configure is your firewall to accept connections to port 631 on your public IP and to forward those to the (presumably) internal IP address of the printer.

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