Gl-mt3000 cannot reach internet when custom exit node is enabled

[bruce]

Hello,

Looks like reproduced the issue locally, but I'm not sure it's consistent.

The router under test is an MT6000 and running v4.8.3 with a fresh configuration.

1. In the GL GUI, enable Tailscale and sign in to the Tailscale account to add the GL router to the Tailscale network.

2. In the GL GUI, enable "Allow Remote Access LAN" and "Allow Remote Access WAN".

3. In the Tailscale console, approve all subnets for the GL router.

4. In the Tailscale console, add Mullvad VPN so the GL router can use it as exit nodes.

5. In the GL GUI, enable Custom Exit Node, refresh the list, and select any Mullvad node.

6. On a client (PC) of the GL router, verify that Internet is unavailable.
   

   

7. In the LuCI, enable Masquerading for "tailscale0 > lan&wan".

8. On a client (PC) of the GL router, vverify that Internet is working fine.
   

   

Please follow step 7, enable Masquerading for "tailscale0 > lan&wan" in LuCI, and test again.