User ecomter is installing Discourse on WSL2 Ubuntu 18.04 and encounters an error indicating that port 443 is not accessible via hostname, despite stopping other web services and configuring DNS records. Arkshine suggests checking the firewall, but ecomter confirms ports 80 and 443 are allowed on both Windows and Azure (where the VM runs). Arkshine notes a port scan reveals only two ports open and advises double-checking Azure settings. ecomter later reports troubleshooting revealed potential WSL network NAT issues; switching to mirrored networking triggered a WSL error (“Wsl/Service/CreateInstance/CreateVm/ConfigureNetworking/0x803b0015”). They’ve opened an issue on WSL’s GitHub and plan to follow up here if needed.
While installing Discourse on WSL2 Ubuntu 18.04, I stopped other web services on Windows. However, the installation displayed an error message.
Hi welcome 
If it’s not a DNS problem, the next step is to check the firewall. Did you check if the connection was not blocked?
I have allowed Port 80 and 443 on both Windows and Azure Portal (because my vm is running on Azure), but it didn’t work, either.
A quick scan tells me the 80 and 443 ports are not open (currently it seems to have two ports open). I don’t know how Azure works, so I can’t help, but I would check again if you don’t miss something on the Azure portal. 
Thank you for your patience. After a lot of troubleshooting on my system, probably a problem with the Wsl network being a NAT, I tried to change it to a mirrored network but encountered the “Wsl/Service/CreateInstance/CreateVm/ConfigureNetworking/0x803b0015” error. I have asked the question on WSL’s GitHub Issues. Thank you very much and I’ll continue to ask questions here if I have any other questions.
