Lecture13 - Address Translation Approaches

Lecture13 - Address Translation Approaches - 11/30/2009 1...

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Unformatted text preview: 11/30/2009 1 CNIT 24000 Data CNIT 24000 Data Communications & Communications & Networks Networks Address Translation Approaches Objectives Extend this understanding for WAN operations Discuss two major public IP address minimization approaches Prepare you for a simple project 11/30/2009 2 Network Address Translation NAT RFC 1631 (1994) RFC 2663 (1999) 2 major drivers IP Address Depletion Scaling of Routing Tables NAT allows hosts in a private network to use a different IP address to access hosts &/or services on an external network Potential use of private IP addressing Reduces the need for globally unique IP addresses for an individual organization NAT Functionality 1 or more public IP addresses assigned to a routing device and multiple internal clients utilizing private IP addressing 2 major approaches NAT PAT/NAPT/NAT Overloading Sometimes called masquerading This can be applied on the source address or the destination address DNAT vs. SNAT 11/30/2009 3 NAT Operations 1 internal host can utilize 1 external address...
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Lecture13 - Address Translation Approaches - 11/30/2009 1...

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