-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i docker0 -j ACCEPT
-A INPUT -s 127.0.0.0/8 -j ACCEPT
-A INPUT -s 192.168.1.2/32 -j ACCEPT
-A INPUT -s 192.168.1.3/32 -j ACCEPT
-A INPUT -s 192.168.1.4/32 -j ACCEPT
-A INPUT -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 110 -j ACCEPT