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NAT PAT Overload

Written by Rene Molenaar on . Posted in Network Services

Scenario:

Emma and Alice are in trouble. They just got a new Internet connection but they forgot to mention to the Internet provider that they required two public IP addresses so they both can access the Internet at the same time. Can you help the damsels in distress?

Goal:

  • All IPv4 addresses have been preconfigured for you.
  • IP Routing has been disabled and a default gateway is configured on router Emma, Alice and WWW.
  • Configure PAT so when router Emma or Alice sends an IP packet to router WWW the source address is translated to the IP address on the F0/0 interface of router PAT.

It took me 1000s of hours reading books and doing labs, making mistakes over and over again until I mastered all the protocols for CCNA.

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You will learn all the secrets about NAT, PAT, overload and more.

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IOS:

c3640-jk9s-mz.124-16.bin

Topology:

NAT PAT Overload

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Comments (2)

  • avatar
    Doytollovski

    (IP Routing has been disabled and a default gateway is configured on router Emma, Alice and WWW) I tried doing this but didnt work when i tried with a default route It works

  • avatar
    ReneMolenaar

    Did you add a default gateway on these devices? You have two options:

    1) Enable IP routing and configure a default route.
    2) Disable IP routing and configure a default gateway.

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