v1.0.0

Tailscale MTU Release

Overview

First stable release of Tailscale MTU, focused on reliable and
persistent MTU management for Tailscale interfaces.

Features

• Persistent MTU configuration across reboots and reconnects
• Immediate MTU application when values are set
• Automatic reapply when the Tailscale interface disappears and
  returns
• Linux and Windows support
• Separate IPv4 and IPv6 MTU handling on Windows
• Simple Windows UI with background service enforcement

Linux

• Stateless CLI installed at /usr/local/bin/tailscale-mtu
• Persistent configuration stored in /etc/tailscale-mtu.conf
• Immediate MTU application via ip link set
• Automatic reapply using udev when available
• MTU range validation with IPv6 safety warning below 1280 bytes

Windows

• Background enforcement via Windows Service (NSSM)
• MTU applied using netsh for IPv4 and IPv6 independently
• Configuration stored under %ProgramData%\TailscaleMTU
• No registry modification
• No exposed network services

Design goals

• Minimal attack surface
• No telemetry
• No remote communication
• Explicit and transparent privilege usage
• Predictable behavior in infrastructure environments

Notes

• Linux uses a single MTU per interface (IPv4 and IPv6 are not
  separate)
• IPv6 requires a minimum MTU of 1280 bytes as defined by RFC 8200
• Incorrect MTU values can cause packet loss, stalls, or broken IPv6
  traffic