Shared IPv4 for VPS on Virtualizor or alternative set up

firstdigital77

I will be grateful if someone can explain in depth to assist me with implementing this set up.

How do I create multiple VPS using 1 IPv4?

Alternatively how can I get IPv4 at an affordable rate so I can use it to complete creating multiple VPS with minimal cost outlay compared to what is originally charged if using conventional method to set up multiple VPS?

Thanks in advance...

BetaRacks

#! /bin/bash
echo -e "Please input your server main ip"
        stty erase '^H' && read -p "(such as 8.8.8.8):" main_ip
        [[ -z "${main_ip}" ]] && echo -e "cancel..." && exit 1
echo -e "Please input how many /24 you want to use, max is 5"
        stty erase '^H' && read -p "(such as 1):" user_ip_num
        [[ -z "${user_ip_num}" ]] && echo -e "cancel..." && exit 1
iptables -t nat -F
iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to ${main_ip}
user_ip_head="10.0."
for (( c = 1; c <= ${user_ip_num}; c++ ));do
    for (( d = 1; d <= 255; d++ ));do
        user_ip=${user_ip_head}${c}"."${d}
        if (("$d" < 10)); then
            ssh_port="6"${c}"00"${d}
            user_port_first=${c}"00"${d}"0"
            user_port_last=${c}"00"${d}"9"
        elif (("$d" < 100)); then
            ssh_port="6"${c}"0"${d}
            user_port_first=${c}"0"${d}"0"
            user_port_last=${c}"0"${d}"9"
        else
            ssh_port="6"${c}${d}
            user_port_first=${c}${d}"0"
            user_port_last=${c}${d}"9"
        fi
        iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport ${ssh_port} -j DNAT --to-destination ${user_ip}:22
        iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport ${user_port_first}:${user_port_last} -j DNAT --to-destination ${user_ip}
        iptables -t nat -A PREROUTING -i eth0 -p udp -m udp --dport ${user_port_first}:${user_port_last} -j DNAT --to-destination ${user_ip}    
    done
done
service iptables save
service iptables restart
echo -e "It seems done"

this is an example of creating a nat forwarder
enable your ipv4 forwarding
then set ip 10.0.0.0/16 for your vps

firstdigital77

Thank you so much @BetaRacks, advise appreciated.