IPTables: Filtering

Filtering Rules

The Filter rules filter packets based on the admin information. The rules can be edited uusing the iptables command.

There are four basic actions that can be passed:

iptables -A  #Append A rule
iptables -D # Delete A Rule
itables -L #List All Rules
iptables -F #Flush the Rules

= Direction (-a)

Filter Rules Apply in three Directions: Outgoing, Incoming and Forwarding.