GL-MT3000 Tailscale custom exit node

Technical Support for Routers VPN, DNS, Leaks
1

I am running into an issue trying to use Tailscale custom exit node feature on my GL-MT3000. I have two MT3000 units. Unit A is set up as a Tailscale exit node at Location A, and Unit B is a traveling router set up as Tailscale connected to the custom exit node (Unit A).

I have used the Unit A as a Tailscale exit node with other devices (phone, PC) extensively without issue. However, I cannot get Unit B to work when connected to Unit A as the custom exit node. Whenever I apply the custom exit node, the Internet stops working for all devices connected to Unit B. From my initial observation, it may be a DNS issue, because I can ping all IP addresses after connecting to custom exit node but cannot resolve hostnames. However, I am not sure what the exact issues are or how to troubleshoot why hostnames are not resolving correctly.

Any advise on how to troubleshoot this?

2

It looks like the DNS issue of the Unit B I think so.

  1. You can try to set the customize DNS Server(like 8.8.8.8/1.1.1.1) on Unit B GL GUI > NETWORK > DNS.

  2. You can try to unbind the Tailscale on the Unit B (including in GL GUI > Application > Tailscale and the Tailscale official dashboard), and reset the Unit B, and re-bind/re-configure it again.