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Cleaning IPTABLES rules and ALLOWING ACCESS to all

This set of commands clears all restrictions for accessing your computer, be carefull because this means a security breach.

NOTE: To execute iptables commands root permissions are required.

This command lists all rules from all chains:
#iptables -L

It is a good idea to back up existing iptables configuration:
#iptables-save > backup_iptables

If later we want to restore the old iptables configuration:
#iptables-restore < backup_iptables

Delete (flush) all rules one by one in current table:
#iptables -F

Delete every non-builtin chain in the table:
#iptables -X

If default policy is to DROP packets, we need to change it to ACCEPT so packets will not be discarded by default.
#iptables -P INPUT ACCEPT
#iptables -P FORWARD ACCEPT
#iptables -P OUTPUT ACCEPT

REFERENCE