container_setup.sh

#!/bin/bash

# Install base tools
apt update -y > /dev/null && apt upgrade -y > /dev/null && apt install curl iptables -y

# Install zerotier
curl -s https://install.zerotier.com | bash

# Join network
zerotier-cli join $1

# Setup iptables rules
PHY_IFACE=eth0; ZT_IFACE=zt7nnig26

iptables -t nat -A POSTROUTING -o $PHY_IFACE -j MASQUERADE
iptables -A FORWARD -i $PHY_IFACE -o $ZT_IFACE -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i $ZT_IFACE -o $PHY_IFACE -j ACCEPT

# Save iptables rules
bash -c iptables-save > /etc/iptables/rules.v4

chmod +x /usr/local/bin/startup.sh
bash /usr/local/bin/startup.sh

systemctl enable startup.service

apt install -y iptables-persistent