A. Control and monitor the flow of data packets on the network firewall must be able to organize, filter and control the data traffic is allowed to access the private network protected by a firewall. Firewalls must be able to conduct an examination of the data packet will Melawati private networks. Some criteria do firewall whether to allow the data packets pass or not, among other things:
A. IP address of the computer source
2. Ports TCP / UDP source from the source.
3. IP address of the destination computer.
4. Ports TCP / UDP destination of data on the destination computer
5. Of the header information stored in the data packet.
B. Perform authentication to access.
C. Application Proxy Firewall is able to examine more than just the header of the packet data, this capability requires the firewall to be able to detect a particular application protocol specification.
D. Record every transaction events that occurred in the firewall. This allows early detection will help the network inroad.
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