Re: External player from Windows to Linux (WSL)

[Jon Kinsey]

I think you need the actual wsl ip address, try: wsl hostname -I Followed by: netsh interface portproxy add v4tov4 listenport=9876 listenaddress=0.0.0.0 connectport=9876 connectaddress=<WSL_IP> Jon On 28 Aug 2025, at 10:49, Øystein Schønning-Johansen <oyste...@gmail.com> wrote:  Hi! I am experimenting a bit with external player - I would love to just download and install a windows build of GNU Backgammon and then connect to an external player hosted on a WSL based linux on the very same hardware. So I've downloaded and installed GNU Backgammon for windows. I have then installed GNU Backgammon on the WSL based Ubuntu 24.04 with apt. (sudo apt install gnubg) Started gnubg on the Linux: gnubg -t started the external player: external 127.0.0.1 9876 Switching back to the GUI gnubg installation on Windows and opening Setting->Players. Clicking the External player radio button and typing in "127.0.0.1:9876 So, now I was hoping that it would work out of the box - however, I get the error message in the Windows based GUI installation. It says: "Windows socket error (127.0.0.1:9876): No connection could be made because the target machine actively refused it." Is this supposed to work, or is it blocked by a setting on my computer? Or is an incompatibility due to the implementation using Winsock on the GUI installation and unix sockets on the WSL? -Øystein