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Tailscale Subnet Routing on OPNSense

Tailscale Install and Setup

For Instructions on how to install and setup Tailscale please visit our Setting up Tailscale on OPNSense in 2025 post

Configuring Subnets on OPNSense

  1. Navigate to VPN > Tailscale > Settings
  2. Select Advertised Routes
  3. Select the Oragne + icon
  4. Enter your subnet you would like to advertise (please ensure it is a subnet configured to one of the networks on the firewall)
  5. Add a descritpion if you would like
  6. Select Save
  7. Repeat for any additional Subnets you would like to advertise

Tailscale Config

  1. Navigate to Tailscale’s Admin Dashboard
  2. Locate your Firewall
  3. Select the 3 dots icon (...)
  4. Select Edit Route Settings
  5. Select the checkbox next to each subnet you added previously
  6. Select Save
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