NAT for IPv4

NAT for IPv4

1. Conceptual NAT

   • NAT features
     • IPv4 private address space
       • What is NAT
         • NAT terminology
           • NAT includes four types of address
             • Internal Local Address
             • Global Global Address
             • External local address
             • Global external address
             • NAT terminology (cont.)
               • How does NAT work?
     • NAT types
       • Static NAT
         • There are three types of NAT translation
           • Static address translation (static NAT)
             • Dynamic address translation (dynamic NAT)
               • Port Address Translation (PAT)
           • Dynamic NAT
             • Port address translation (PAT
               • Next available port
                 • Comparison between NAT and PAT
       • NAT advantages
         • NAT retains the legally registered addressing scheme
           • NAT increases the flexibility of connections to the public network
             • NAT provides consistency to internal network routing schemes
               • provides network security
         • Disadvantages of NAT
           • Network performance deteriorates
             • end-to-end functionality is impaired
               • ip tracking is reduced from end to end
                 • the tunnelig becomes more complicated
                   • the only one of the tcp connections can be interrupted
     • Configure static NAT
       • Static NAT analysis
         • Static NAT verification
       • configure dynamic NAT
         • Dynamic NAT operation
           • Dynamic NAT Settings
             • Dynamic NAT analysis
               • Dynamic NAT Verification
       • Set PAT
         • PAT configuration: address set
           • PAT configuration: single address
             • PAT analysis
               • PAT Verification
         • configure port forwarding
           • Forwarding of ports
             • Wireless Router Example
               • Port forwarding configuration with IOS
           • NAT and IPv6
             • NAT for IPv6
               • Unique local IPv6 addresses
                 • NAT for IPv6

2. Solve NAT problems

   • Commands to solve NAT problems
     • The show ip nat commands
       • The debug ip nat command
         • Problem solving situation in NAT