This guide explains how to determine and set correct MTU values with and without WireGuard.
It includes examples for automatic detection, PMTU probing, egress application, and WireGuard overrides.
Reference: conversation about wg-mtu-auto practical usage and testing at https://chatgpt.com/share/68efc179-1a10-800f-9656-1e8731b40546
- Added main.py: automatic WireGuard MTU calculation and PMTU probing
- Added test.py: unittests covering base, PMTU, and fallback scenarios
- Added Makefile: includes test target and install guidance
- Added README.md: usage, pkgmgr installation, and MIT license
Reference: https://chatgpt.com/share/68efc179-1a10-800f-9656-1e8731b40546