Hi @BrendanH. Thanks for being part of GoDaddy Community! If you are using GoDaddy DNS, you would not be able to add a port designation along with the IP address in an A Record. I moved your post to our VPS and Dedicated Server board as this seems more like a server config issue than a domain issue. Hope this helps you get some suggestions. I hope you're able to get it figured out. If you are able to fix this, please consider following up here. Others may benefit from what you experienced.
JesseW - GoDaddy | Community Manager | 24/7 support available at x.co/247support | Remember to choose a solution and give kudos.