Can't access my asus router's web GUI when connected to vpn

if your tailscale is on latest version then you shouldn’t face such issue. but anyway, try disabling it explicitly. try snat-subnet-routes to false as well.

No, I’m running 1.64.2

Sorry, I am by no means an expert. How can I achieve this? Could you be more specific on the section and the content?

Can you post a screenshot of what you are talking about because im looking at an asus firewall and dont see anywhere to make a rule to allow incoming internal connections to the firewall

Do you by chance have a static route for 100.64.0.0/10 on your router pointing to your subnet router ip?

Update to 1.66.4, there was some stateful-filtering things that were implemented with 1.66.0 that broke subnet routers, it was undone in 1.66.4

Stateful filtering is now off by default. Stateful filtering was introduced in 1.66.0 as a mitigation for a vulnerability described in TS-2024-005, and inadvertently broke DNS resolution from containers running on the host. Most vulnerable setups are protected by other mitigations already, except when autogroup:danger-all is used in ACLs.

How could I check that?

I just updated to the latest stable docker image, which is 1.66.3-1

So you would go into the static route section, add a route for 100.64.0.0/10 and point the gateway ip address to the local ip address of your subnet router

It is still not working after the update

I don’t have multiple routers. I mean, I have one router in router mode and two other routers in access point mode. Is this for my current use case?

fully remove tailscale and redeploy it with arguments --stateful-filtering=false --snat-subnet-routes=false

Not sure what is 1.66.3-1 or what updates were applied to it.