iptables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT 0 -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp flags:ACK/ACK ACCEPT 0 -- anywhere anywhere state ESTABLISHED ACCEPT 0 -- anywhere anywhere state RELATED ACCEPT udp -- anywhere anywhere udp spt:domain dpts :1024:65535 ACCEPT icmp -- anywhere anywhere icmp echo-reply ACCEPT icmp -- anywhere anywhere icmp destination-un reachable ACCEPT icmp -- anywhere anywhere icmp source-quench ACCEPT icmp -- anywhere anywhere icmp time-exceeded ACCEPT icmp -- anywhere anywhere icmp parameter-prob lem ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT tcp -- anywhere anywhere tcp dpt:auth ACCEPT tcp -- anywhere anywhere tcp dpt:www ACCEPT tcp -- anywhere anywhere tcp dpt:https ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:domain Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination