Book Errata & Updates

ERRATA-001 · FEBRUARY 2026 CORRECTION

Corrected in the current books.
Still free for every reader.

The errata corrections have been added to the current versions of the affected books. The separate errata PDFs remain available free of charge for anyone who wants to verify the changes or who purchased an earlier version.

Status: Resolved in current versions. If you have an earlier copy, use the free errata alongside it before following the affected CLI instructions.

Which books were affected?

  • UNDETECTED: Building Your First Tailnet (Volume 2)
    ISBN: 978-1-971277-01-1 · Sections 8.4 and 9.4
  • Remote Security & VPN Survival Guides: Tailscale Mesh VPN for Remote Work
    ISBN: 978-1-971277-06-6 · Section 5.4.2

Download the free errata

No purchase is required. Use these PDFs to compare the corrections with your copy or to supplement a previous version.

Book 2 errata · PDFConsolidated book errata · PDF

Also available in the free Gumroad errata bundle.

What was corrected?

CLI subnet route command

The earlier instructions omitted the --advertise-routes flag. In the affected setup, that omission could prevent LAN devices from routing through the exit node and cause a loss of internet connectivity.

  • Corrected CLI commands for the affected sections
  • Explanation of the required flags and subnet-route approval
  • Clarified SSH command context

Hardware, firmware, and network conditions still affect behavior. Confirm compatibility and test routing and recovery in your own authorized environment.

Do I need to buy the book again?

No additional purchase is needed to get these corrections. If you own an earlier version, download the free errata above and keep it with your copy. Current versions already include the corrections; the standalone PDFs remain available as a reference.

Explore the UNDETECTED books · Questions? partners@fatboytravelsllc.com