Glimpse On Firewalls about firewall

[masrawy 0]

A firewall is a hardware or software solution to enforce security policies. In the physical security analogy, a firewall is equivalent to a door lock on a perimeter door or on a door to a room inside of the building - it permits only authorized users such as those with a key or access card...Firewall systems often consist of many parts. since I have developped firewall system before, I can give a picture of this security system. It often includes packet filter system which filters packets going into and out of you computer which is connected to the outer network, it inspects each packet for user defined content, such as an IP address but does not track the state of sessions. This is one of the least secure types of firewall.Firewall system also includes what is called IP tracer which traces IP addresses to give an idea about the location of the computer carrying this IP address, the idea behind this is to send a request to 'WHOIS' servers which contain information about IP addresses including their locations.Firwall system also includes Program authentication system which authenticates every program that requests access to the internet to ensure that they do not perform malicious activity or unallowed task.