sudo tailscale up --exit-node=100.77.128.43 --exit-node-allow-lan-access

Evel
Mar '21

Wow it was not clear to me that the options needed to be passed like this together. That could have been a lot more clear on the quick start page.
Site A
tailscale up --advertise-routes=10.201.150.0/24,10.201.200.0/24 --accept-routes=true --snat-subnet-routes=true
Site B
tailscale up --advertise-routes=192.168.86.0/24 --accept-routes=true --snat-subnet-routes=true

sudo tailscale up --accept-dns=true --accept-routes=true --advertise-exit-node=true --accept-routes=true --advertise-routes="192.168.0.0/24,10.0.0.0/24" --advertise-tags="tag:server" --exit-node-allow-lan-access