Next.js dev server runs but localhost won’t open (WSL + Cursor setup)

[primeautomation-dev]

Hi, I’m running a Next.js project inside WSL (Ubuntu) using Cursor.

The dev server starts normally and shows:
Local: http://localhost:5173
Network: http://0.0.0.0:5173

But when I open localhost:5173 in the Windows browser, it refuses to connect.

I already tried:

• Running with -H 0.0.0.0
• Reinstalling node_modules
• Using npm and nvm inside WSL
• Disabling firewall temporarily

It still doesn’t open.

What could be causing this and how can I fix the Windows ↔ WSL connection for Next.js dev server?

Thanks.

[anntnzrb]

Enable WSL2 mirrored networking by creating/editing %USERPROFILE%\.wslconfig with:

[wsl2]
networkingMode=mirrored
localhostForwarding=true

Then run wsl --shutdown in PowerShell and restart WSL. This fixes automatic port forwarding so Windows browsers can access WSL localhost services.