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tunnel: авто-DNAT для NDM/81 через wg0 (fix connection refused)

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Андрей Бобырев
2026-04-26 16:02:41 +03:00
parent 858ff8b6ef
commit 4e9f413521
3 changed files with 28 additions and 0 deletions
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21
tunnel/tunnel-install.sh
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@@ -20,6 +20,7 @@ WG_SUBNET="${WG_SUBNET:-10.99.0.1/32}"
WG_KEEPALIVE="${WG_KEEPALIVE:-25}"
WG_DIR="/opt/etc/wireguard"
INIT="/opt/etc/init.d/S50kssh-tunnel"
NAT_TAG="kssh-tunnel:ndm81"
[ -z "$VPS_ENDPOINT" ] && { echo "VPS_ENDPOINT обязателен" >&2; exit 1; }
[ -z "$VPS_PUBKEY" ] && { echo "VPS_PUBKEY обязателен" >&2; exit 1; }
@@ -68,6 +69,7 @@ WG_DIR="$WG_DIR"
CONF="\$WG_DIR/\$WG_IF.conf"
ADDR="$CLIENT_IP/24"
SUBNET="$WG_SUBNET"
NAT_TAG="$NAT_TAG"
up() {
ip link show "\$WG_IF" >/dev/null 2>&1 && ip link del "\$WG_IF" 2>/dev/null
@@ -87,6 +89,20 @@ up() {
if command -v iptables >/dev/null 2>&1; then
iptables -C INPUT -i "\$WG_IF" -j ACCEPT 2>/dev/null || iptables -I INPUT 1 -i "\$WG_IF" -j ACCEPT
iptables -C OUTPUT -o "\$WG_IF" -j ACCEPT 2>/dev/null || iptables -I OUTPUT 1 -o "\$WG_IF" -j ACCEPT
# NDM/HTTP Proxy на Keenetic часто слушает на LAN-IP:81, но не на wg0:81.
# Для доступа к /auth через туннель делаем DNAT wg0:81 → LAN_IP:81.
LAN_IP=""
for IF in br0 br-lan; do
LAN_IP=\$(ip -4 -o addr show "\$IF" 2>/dev/null | awk '{print \$4}' | cut -d/ -f1 | head -n 1)
[ -n "\$LAN_IP" ] && break
done
if [ -z "\$LAN_IP" ]; then
LAN_IP=\$(ip -4 -o addr show 2>/dev/null | awk -v wg="\$WG_IF" '\$2!=wg && \$2!=\"lo\" {print \$4}' | cut -d/ -f1 | head -n 1)
fi
if [ -n "\$LAN_IP" ]; then
iptables -t nat -C PREROUTING -i "\$WG_IF" -p tcp --dport 81 -m comment --comment "\$NAT_TAG" -j DNAT --to-destination "\$LAN_IP:81" 2>/dev/null || \
iptables -t nat -I PREROUTING 1 -i "\$WG_IF" -p tcp --dport 81 -m comment --comment "\$NAT_TAG" -j DNAT --to-destination "\$LAN_IP:81" 2>/dev/null || true
fi
fi
if ! wg show "\$WG_IF" | grep -q '^peer:'; then
echo "ВНИМАНИЕ: peer не появился в \$WG_IF — handshake не состоится."
@@ -103,6 +119,11 @@ down() {
while iptables -C OUTPUT -o "\$WG_IF" -j ACCEPT 2>/dev/null; do
iptables -D OUTPUT -o "\$WG_IF" -j ACCEPT 2>/dev/null || break
done
# удалить наши DNAT-правила (если были)
while iptables -t nat -S PREROUTING 2>/dev/null | grep -q "\$NAT_TAG"; do
RULE=\$(iptables -t nat -S PREROUTING | grep "\$NAT_TAG" | head -n 1 | sed 's/^-A /-D /')
[ -n "\$RULE" ] && iptables -t nat \$RULE 2>/dev/null || break
done
fi
echo "stopped \$WG_IF"
}