firewall

#!/bin/sh

iptables -F
iptables -X
iptables -Z
iptables -t nat -F
iptables -t nat -X
iptables -t nat -Z

iptables -N Firewall-INPUT

iptables -A Firewall-INPUT -i lo -j ACCEPT
iptables -A Firewall-INPUT -p ICMP -j ACCEPT
iptables -A Firewall-INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
iptables -A Firewall-INPUT -p TCP --dport 22 -s 140.115.0.0/16 -j ACCEPT
iptables -A Firewall-INPUT -p TCP --dport 3632 -m iprange --src-range 140.115.18.231-140.115.18.234 -j ACCEPT
iptables -A Firewall-INPUT -p TCP --dport 9712 -m iprange --src-range 140.115.18.231-140.115.18.234 -j ACCEPT
iptables -A Firewall-INPUT -j DROP

iptables -A INPUT -j Firewall-INPUT