Introduction - If you have any usage issues, please Google them yourself
linuxptables-P INPUT-A-p tcp-s 192.168.100.0/24--dport 445-j ACCEPT
iptables-P INPUT-A-p udp-s 192.168.100.0/24--dport 137-j ACCEPT
iptables-P INPUT-A-p udp-s 192.168.100.0/24--dport 138-j ACCEPT
iptables-P INPUT-A-p udp-s 192.168.100.0/24--dport 445-j ACCEPT