Enabling VPN Access in WSL2

When using the UM VPN with WSL2, WSL2 loses internet connectivity after connecting. Follow these steps to fix it.

Configure WSL2

1. Disable automatic DNS configuration

Create or edit /etc/wsl.conf and add:

[network]
generateResolvConf = false

This prevents WSL2 from overwriting its own resolv.conf.

2. Set the DNS nameservers

If /etc/resolv.conf is a symlink, remove it first:

sudo rm /etc/resolv.conf

Then create it with:

nameserver 137.120.1.1
nameserver 137.120.1.5
nameserver 8.8.8.8
search unimaas.nl

After connecting to the VPN, run the following command in PowerShell:

Get-NetAdapter | Where-Object {$_.InterfaceDescription -Match "Cisco AnyConnect"} | Set-NetIPInterface -InterfaceMetric 6000

You should now have connectivity inside WSL2. Verify it with:

ping google.com -c 4