Iptables is one of the most powerful tools of Linux's kernel. It is used largely in servers and devices worldwide. Elastix's security module incorporates iptables' main features into its webGUI in order to secure our Unified Communications Server. This module is available in the Security | Firewall menu. In this module's main screen, we can check the status of the firewall (Activated or Deactivated). We will also notice the status of each rule of the firewall with the following information:
Order: This column represents the order in which rules will be applied
Traffic: The rule will be applied to any ingoing or outgoing packet
Target: This option allows, rejects, or drops a packet
Interface: This represents the network interface on which the rule will be used
Source Address: The firewall will search for this IP source address and apply the rule.
Destination Address: We can apply a firewall rule if the destination address is matched
Protocol: We can apply a rule...