WSL2 network not working after sleep/wake

What is WSL2-NETWORK-BROKEN?

After the PC wakes from sleep, WSL2 has no internet connectivity. DNS fails and ping fails inside the subsystem.

Common Causes

• Hyper-V virtual switch does not properly recover after sleep
• WSL2 DNS server address gets stale
• Windows Firewall rule blocks WSL2 adapter

Step-by-Step Fix Guide

• 1
  Restart WSL: wsl --shutdown followed by wsl
• 2
  Run inside WSL: echo 'nameserver 8.8.8.8' > /etc/resolv.conf
• 3
  Check Windows Firewall for 'vEthernet (WSL)' adapter rules

Commands & Diagnostics