Possible to use wireguard client and Tailscale?

Technical Support for Routers VPN, DNS, Leaks
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Can I use Tailscale and WireGuard client together?

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Yes, but not recommended to turn on “Custom Exit Nodes”, I don’t know what’s gonna happen.

That said, enabling both Tailscale and wireguard client make traffic complicated.
Before firmware 4.5, the underlying traffic of Tailscale(port 41641) goes via Non-VPN interface.
From 4.5, it will go via wireguard VPN interface, so you will find a public VPN IP at tailscale console - Machine Details page.

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