Root cause: sysctl -q net.ipv4.conf.all.rp_filter=0 in PostUp exited non-zero
inside the linuxserver/wireguard container (no permission), causing wg-quick to
tear down the wg0 interface — breaking peer status, port check, and internet
access through full tunnel.
- wireguard_manager.py: add || true to both sysctl PostUp/PostDown lines
- docker-compose.yml: add net.ipv4.conf.all.rp_filter=0 to wireguard sysctls
- WireGuard.jsx: kick off port check asynchronously on page load (was refresh-only)
- tests: add TestWireGuardSysctlAndPortCheck — 14 new tests covering sysctl
content, check_port_open (interface up / down / fallback-to-handshake),
get_peer_status (online / offline / not-found / no-handshake), and
get_all_peer_statuses (multi-peer / empty / skips interface line)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
roof
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