Play Red Alert 3 (Bypass 6667/tcp Block)

Some ISP still blocking TCP Port 6667 which it use for IRC, however Red Alert 3 still use 6667/tcp functionality for Lobby chatting, to bypass such restriction, follow these steps:

Host File

Add these lines into your Operating System host file.

127.0.0.1	files.ea.com
127.0.0.1	peerchat.server.cnc-online.net

Proxy

Ww are going to use IPv4 NAT/Proxy to Listen 127.0.0.1:6667 to Another Server at 6668

Windows

netsh interface portproxy add v4tov4 listenaddress=127.0.0.1 listenport=6667 connectaddress=103.131.188.71 connectport=6668

Linux

sudo iptables -t nat -A PREROUTING -p tcp -d 127.0.0.1 --dport 6667 -j DNAT --to-destination 103.131.188.71:6668

Test

Run this command (Windows PowerShell):

Test-NetConnection peerchat.server.cnc-online.net -port 6667

Make sure you have TcpTestSucceeded : True then you can enjoy the online game!