How do I enable NAT Loopback?

CrackersCandy2

I have a default Spectrum router (SAX1V1K) and I am trying to enable NAT Loopback for an ARK: Survival Evolved Server. Any posts on reddit (none on the Spectrum forums about this subject at all) all of them suggest buying a NON-Spectrum official router.

HT_Greenfield

Supposed tried and true alternative:

🔗https://www.reddit.com/r/homelab/comments/6la9o7/my_isps_modemrouter_prevents_nat_loopback_so_i/