1. install & config

./pic/synology01.png

./pic/synology02.png

./pic/synology03.png

./pic/synology04.png

2. fix

https://tailscale.com/kb/1131/synology#enabling-synology-outbound-connections

2.1. temporary by command

/var/packages/Tailscale/target/bin/tailscale "configure-host"
synosystemctl restart pkgctl-Tailscale.service

2.2. permanent by gui

./pic/synology11.png

./pic/synology12.png

./pic/synology13.png

./pic/synology14.png

2.3. permanent by script

touch -a /usr/local/etc/rc.d/startup.sh
chmod +x /usr/local/etc/rc.d/startup.sh
echo '/var/packages/Tailscale/target/bin/tailscale "configure-host"' >> /usr/local/etc/rc.d/startup.sh
echo 'synosystemctl restart pkgctl-Tailscale.service' >> /usr/local/etc/rc.d/startup.sh