Atlas Dedicated Server Setup Guide - Part 10: Firewall Updates
Authorize ShooterGameServer.exe - Windows Defender
Before we restart, we need to add the shootergameserver.exe to the windows firewall. Click start and type firewall. Open the Windows Defender Firewall (this guide only uses the defender firewall)
Click the "all an app or feature through Windows Defender Firewall" on the left hand side.
Click the button "Allow another app"
Click Browse and select our executable: "c:\games\atlas\ShooterGame\Binaries\Win64\ShooterGameServer.exe"
Click OK Close the Windows Defender Firewall
Port Forwarding - NAT Interface (as required)
There is no guide for me to give you. Every brand of router, and often different versions\firmware of the same router, will have different steps on how to do port forwarding. Find your make\model, find you user guide, and add port forwarding. Be sure to add the exactly as documented in your Port Spreadsheet. Some are TCP, some are UDP, and one is both. Pay attention, go slow, and get it right. This is a PITA to troubleshoot later.
NAT Reflection\Loopback (not recommended)
I do not have a guide for this. NAT reflection has a number of cybersecurity concerns. However, it is possible to use it to play Atlas on a LAN. The internet can teach you how if you really want to know.