MU Online server network setup: port forwarding and Hamachi
Complete guide to networking a MU Online private server: how to identify the ports your server uses (ConnectServer, GameServer, website), how to set up port forwarding on the most common router brands (TP-Link, D-Link, Netgear, Asus), what to do when you have modem + router (double NAT problem and how to solve it with bridge mode), how to configure the Windows Firewall to allow server traffic, using Hamachi as an alternative for friends-only servers (setup, limitations, and why it doesn't scale), diagnosing connection problems with netstat and telnet, and what CGNAT means and why it blocks port forwarding on some ISPs.
