install.sh

apt update
apt upgrade -y
apt install iptables -y

wget https://raw.githubusercontent.com/Angristan/openvpn-install/master/openvpn-install.sh

chmod +x openvpn-install.sh

AUTO_INSTALL=y APPROVE_INSTALL=y APPROVE_IP=y IPV6_SUPPORT=y PORT_CHOICE=1 PROTOCOL_CHOICE=1 DNS=3 COMPRESSION_ENABLED=n CUSTOMIZE_ENC=n CLIENT=Helium-Mango PASS=1 ENDPOINT=$(curl -4 ifconfig.co) ./openvpn-install.sh

export MENU_OPTION="1"
export CLIENT="Helium-PC"
export PASS="1"
./openvpn-install.sh

iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1240
iptables -A FORWARD -i tun0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth0 -o tun0 -p tcp --syn --dport 44158 -m conntrack --ctstate NEW -j ACCEPT
iptables -A FORWARD -i eth0 -o tun0 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 44158 -j DNAT --to-destination 10.8.0.2

echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf

sysctl -p

apt-get install iptables-persistent -y

netfilter-persistent save
netfilter-persistent reload

touch /etc/openvpn/ccd/Helium-Mango
touch /etc/openvpn/ccd/Helium-PC

echo "# static IP for the Client (Client-IP Subnet)" > /etc/openvpn/ccd/Helium-Mango
echo ifconfig-push 10.8.0.2 255.255.255.0 >> /etc/openvpn/ccd/Helium-Mango
echo "# static IP for the PC (PC-IP Subnet)" > /etc/openvpn/ccd/Helium-PC
echo ifconfig-push 10.8.0.4 255.255.255.0 >> /etc/openvpn/ccd/Helium-PC

echo "# Location of the config files" >> /etc/openvpn/server.conf
echo client-config-dir ccd >> /etc/openvpn/server.conf
echo "# Route to the network from host to OVPN Server" >>/etc/openvpn/server.conf
echo route 192.168.8.0 255.255.255.0 >> /etc/openvpn/server.conf
echo  "# Tell all clients the Home address" >>/etc/openvpn/server.conf
echo push '"route 192.168.8.0 255.255.255.0"'  >> /etc/openvpn/server.conf
echo "# DNS-Server for Clients (Mango)">>/etc/openvpn/server.conf
echo push '"dhcp-option DNS 192.168.8.1"' >> /etc/openvpn/server.conf