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Static, Dynamic, and Overload NAT

Randal Moss and Amy Lee. Static, Dynamic, and Overload NAT. NAT Overview. What is NAT? Purpose Saves IP addresses Many private IPs -> smaller public IPs Three Types Static Dynamic Nat overload (PAT). NAT Overview(Cont.). Decreases amount of public IP addresses in networks.

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Static, Dynamic, and Overload NAT

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  1. Randal Moss and Amy Lee Static, Dynamic, and OverloadNAT

  2. NAT Overview • What is NAT? • Purpose • Saves IP addresses • Many private IPs -> smaller public IPs • Three Types • Static • Dynamic • Nat overload (PAT)

  3. NAT Overview(Cont.) • Decreases amount of public IP addresses in networks. • Conserves legally registered addresses. • Ease of two companies merging with duplicate internal addressing. • Ease of changing ISPs • Do not need to change internal address scheme.

  4. Basic Nat (Static) • Inside Local/Global • Static Translation • ipnat inside source static 10.10.10.1 172.16.131.1 • Demo Static

  5. Static NAT Ping

  6. Static NAT Debug

  7. Static NAT Translations

  8. Dynamic NAT • Inside Local/Global • Dynamic Translation via pool • Example: • ipnat pool test 172.16.131.2 172.16.131.10 netmask 255.255.255.0

  9. Dynamic NAT Ping

  10. Dynamic NAT Debug/Translation

  11. Nat Overload (PAT) • Inside Local/Global • Dynamic Translation via pool • Example: • ipnat pool test 172.16.131.2 172.16.131.2 netmask 255.255.255.0 • Saves IP addresses

  12. PAT Ping

  13. PAT Debug/Translation

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