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26 lines
901 B
Bash
26 lines
901 B
Bash
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#!/bin/bash
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WIREGUARD_INTERFACE=ADMINS
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WIREGUARD_LAN=10.0.0.1/24
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MASQUERADE_INTERFACE=eth0
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iptables -t nat -I POSTROUTING -o $MASQUERADE_INTERFACE -j MASQUERADE -s $WIREGUARD_LAN
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# Add a WIREGUARD_wg0 chain to the FORWARD chain
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CHAIN_NAME="WIREGUARD_$WIREGUARD_INTERFACE"
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iptables -N $CHAIN_NAME
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iptables -A FORWARD -j $CHAIN_NAME
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# Accept related or established traffic
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iptables -A $CHAIN_NAME -o $WIREGUARD_INTERFACE -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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# Accept traffic from any Wireguard IP address connected to the Wireguard server
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iptables -A $CHAIN_NAME -s $WIREGUARD_LAN -i $WIREGUARD_INTERFACE -j ACCEPT
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# Allow traffic to the local loopback interface
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iptables -A $CHAIN_NAME -o lo -j ACCEPT
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# Drop everything else coming through the Wireguard interface
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iptables -A $CHAIN_NAME -i $WIREGUARD_INTERFACE -j DROP
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# Return to FORWARD chain
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iptables -A $CHAIN_NAME -j RETURN
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