Relay Server

Install tailscale on the relay server, and join it to your tailnet.

curl -fsSL https://tailscale.com/install.sh | sh
tailscale up

Then, install rinetd and jq.

apt install rinetd jq

Disable (don't start the service on server startup) and stop (stop the service now) the default installed systemd service for rinetd.

systemctl disable rinetd
systemctl stop rinetd

Edit rinetd's config to include this section. Make note of your public static IP address for the first column, bindadress.

/etc/rinetd.conf

# bindadress    bindport  connectaddress  connectport
207.148.11.91   443       homelab-relay   443
207.148.11.91   80        homelab-relay   80

Create custom rinetd systemd service by editing the file /etc/systemd/system/tailscale-rinetd.service to contain the folowing.

/etc/systemd/system/tailscale-rinetd.service

[Unit]
Description=rinetd systemd native supporting Tailscale
Documentation=https://mbund.github.io/homelab
Requires=tailscaled.service
After=tailscaled.service

[Service]
Type=forking
Restart=no
TimeoutSec=5min
IgnoreSIGPIPE=no
KillMode=process
GuessMainPID=no
RemainAfterExit=yes
SuccessExitStatus=5 6
ExecStartPre=/bin/sh -c 'while [ $(tailscale status --peers=false --json=true | jq -r ".Self.Online") = "false" ]; do sleep 1; done'
ExecStart=/etc/init.d/rinetd start
ExecStop=/etc/init.d/rinetd stop
ExecReload=/etc/init.d/rinetd

[Install]
WantedBy=multi-user.target

Enable (start the service on server startup) and start (start the service now) the newly created service.

systemctl enable tailscale-rinetd.service
systemctl start tailscale-rinetd.service