firewalls and Virtual Private Networks(VPNs)

create the the project

Tool:UsingOPNET IT Guru Academic EditionObjective:The objective of this lab isto study the role of firewalls and Virtual Private Networks(VPNs) in providing security to shared public networks such as the Internet.Overview:Computer networks are typically a shared resource used by many applications for manydifferent purposes. Sometimes the data transmitted between application processes isconfidential, and the application users would prefer that others not be able to read it.A firewall is a specially programmed router that sits between a site and the rest of thenetwork. It is a router in the sense that it is connected to two or more physical networksand it forwards packets from one network to another, but it also filters the packets that flowthrough it. A firewall allows the system administrator to implement a security policy in onecentralized place. Filter-based firewalls are the simplest and most widely deployed type offirewall. They are configured with a table of addresses that characterize the packets theywill and will not forward.A VPN is an example of providing a controlled connectivity over a public network such asthe Internet. VPNs utilize a concept called an IP tunnela virtual point-to-point linkbetween a pair of nodes that are separatedby an arbitrary number of networks.The virtual link is created within the router at the entrance to the tunnel by providing it withthe IP address of the router at the far end of the tunnel. Whenever the router at theentrance of the tunnel wants to send a packet over this virtual link, it encapsulates thepacket inside an IP datagram. The destination address in the IP header is the address ofthe router at the far end of the tunnel, while the source address is that of the encapsulatingrouter.In this project youwilldo the following tasks:1-set up a network where servers are accessed over the Internet bycustomers who have different privileges. 2-You will study how firewalls and VPNs canprovide security to the information in the servers while maintaining access for customerswith the appropriate privilege.ProcedureSee the attached Opnet guru student edition materials