Clearing IPTables rules
Occasionally I find it necessary to quickly clear out all the IPTables rules without accidentally losing access to the machine. I've found the below commands to be the quickest way to accomplish that goal (substitute ip6tables if you live in an IPv6 world) iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -t nat -F iptables -t mangle -F iptables -F iptables -X You can confirm afterward by running iptables -nvL , which should produce output similar to: Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination