... network Send your friends the name of the Radmin VPN network and the password to join to this network. Step 3: Add the game to the firewall exceptions You need to add rules to the firewall. Open Radmin VPN -> System -> Firewall Exceptions and add Portal 2 (portal2.exe) to the exceptions. [File:rvpn_fw.png] Step 4: Install Portal 2: Multiplayer Mod Install  Portal 2: Multiplayer Mod  (Mod for Windows is only supported on 64-bit versions of Windows 10 and Windows 11). This mod aims to get 33 players ...

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