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feat: support for configuring iptables masquerading for NAT #2

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Merged
merged 1 commit into from
May 10, 2025
Merged

feat: support for configuring iptables masquerading for NAT #2

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2 changes: 1 addition & 1 deletion Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ COPY bin/ /usr/local/bin

RUN apt-get update \
&& apt-get dist-upgrade -y \
&& apt-get install -y openvpn \
&& apt-get install -y openvpn iptables \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* \
&& chmod +x /usr/local/bin/*
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14 changes: 12 additions & 2 deletions bin/entrypoint
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Original file line number Diff line number Diff line change
@@ -1,9 +1,19 @@
#!/bin/bash

CONFIG_DIR=/etc/openvpn

ENABLE_NAT=${ENABLE_NAT:-1}
NAT_SOURCE=${NAT_SOURCE:-10.8.0.0/24}
NAT_DEVICE=${NAT_DEVICE:-eth0}

# Create device for tun interfaces
mkdir -p /dev/net
if [ ! -c /dev/net/tun ]; then
mknod /dev/net/tun c 10 200
mknod /dev/net/tun c 10 200
fi

if [[ $ENABLE_NAT = 1 ]]; then
iptables -t nat -A POSTROUTING -s ${NAT_SOURCE} -o ${NAT_DEVICE} -j MASQUERADE
fi

openvpn --config /etc/openvpn/openvpn.conf $@
exec openvpn --config ${CONFIG_DIR}/openvpn.conf --cd ${CONFIG_DIR} $@