Tailscale 1.18

Platform independent

• Improve UPnP discovery; eero devices now work, allowing a port to be opened for direct connections (also in 1.16.2)
• If unable to upload telemetry, limit amount buffered to 50MB
• Retry more transient DNS errors, instead of passing the failure back to the client

Linux

• Support storing Tailscale state using AWS SSM (ex: tailscaled -state arn:aws:ssm:eu-west-1:123456789:parameter/foo) (thank you Maxime VISONNEAU)
• use AF_NETLINK messages to configure IP, not the ip command.
• if resolvconf wrote /etc/resolv.conf but pointed it to systemd-resolved, use systemd-resolved for DNS not resolvconf
• if NetworkManager wrote /etc/resolv.conf but pointed it to systemd-resolved, use systemd-resolved for DNS not NetworkManager
• handle /etc/resolv.conf being a bind mount into a container, such that we cannot rename() it.

iOS

• on iOS 15+, where Network Extensions have more memory available, allow the same number of DNS-over-HTTPS requests in flight as other platforms

Synology

• only use AmbientCaps on DSM7+