Issue #50: AWG2 clients connect (handshake OK) but no traffic flows. The
awg2 client output_template lost its "MTU = 1280" line when migration 064
rewrote it (migration 058 had it). With no explicit MTU the client defaults
to 1420, which is too large once AmneziaWG obfuscation overhead (Jc junk
packets, S1/S2 padding) is added on top of WireGuard's: small packets (the
handshake) pass, larger packets (TLS, web pages) are dropped — tunnel
"connected" but unusable. 1280 is the official Amnezia app default.
- migrations/071: add "MTU = 1280" to the awg2 output_template (existing DBs).
- migrations/064: add the MTU line to the template source (fresh installs).
- buildClientConfig(): emit MTU = 1280 in the fallback path too.
Server-side NAT/forwarding/ip_forward were verified correct on a live server,
so this is purely a client-config regression. Generated client config now
contains "MTU = 1280" and mirrors the server's obfuscation params exactly.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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