#!/bin/bash

# install wireguard
add-apt-repository ppa:wireguard/wireguard
apt update
apt install wireguard

# to enable kernel relaying/forwarding ability on bounce servers
echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
echo "net.ipv4.conf.all.proxy_arp" >> /etc/sysctl.conf
sudo sysctl -p /etc/sysctl.conf

# to add iptables forwarding rules on bounce servers
iptables -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i wg0 -o wg0 -m conntrack --ctstate NEW -j ACCEPT
iptables -t nat -A POSTROUTING -s 10.0.44.0/24 -o eth0 -j MASQUERADE