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feat(vpn): add startup connectivity checks and PersistentKeepalive

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Add check_vpn_connectivity() that runs once after wg0 comes up:
- Waits for handshake (up to 15s) and prints public key if missing
- Measures RX bytes before/after curl to detect server-side routing issues
- Tests DNS resolution and dumps resolv.conf on failure
- On failure prints exact server-side commands to fix (sysctl, iptables, wg)

Add PersistentKeepalive=25 to wg0.conf to keep NAT mappings alive.
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Lukas
2026-05-17 18:40:24 +02:00
parent be87f2e230
commit 68c4335348
2 changed files with 89 additions and 1 deletions
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Docker/wg0.conf
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@@ -13,4 +13,5 @@ PostDown = ip route del 192.168.178.0/24 via 192.168.178.1 dev wlp4s0f0
PublicKey = KgTUh3KLijVluDvNpzDCJJfrJ7EyLzYLmdHCksG4sRg=
AllowedIPs = 0.0.0.0/0
Endpoint = 91.148.236.64:51820
PersistentKeepalive = 25