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    NAT and PAT

    Uploaded by

    Oleg Padurari
    This document discusses Network Address Translation (NAT) and Port Address Translation (PAT). It defines the key terms related to NAT such as inside local addresses, inside global addresses, outside local addresses, and outside global addresses. It explains the features of static NAT, dynamic NAT and PAT. It also covers benefits, configuration, verification, troubleshooting and common issues related to NAT and PAT.

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    © All Rights Reserved
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    NAT and PAT

    Uploaded by

    Oleg Padurari
    252 views15 pages
    This document discusses Network Address Translation (NAT) and Port Address Translation (PAT). It defines the key terms related to NAT such as inside local addresses, inside global addresses, outside local addresses, and outside global addresses. It explains the features of static NAT, dynamic NAT and PAT. It also covers benefits, configuration, verification, troubleshooting and common issues related to NAT and PAT.

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    NAT-and-PAT

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    This document discusses Network Address Translation (NAT) and Port Address Translation (PAT). It defines the key terms related to NAT such as inside local addresses, inside global addresses, outside local addresses, and outside global addresses. It explains the features of static NAT, dynamic NAT and PAT. It also covers benefits, configuration, verification, troubleshooting and common issues related to NAT and PAT.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    252 views15 pages

    NAT and PAT

    Uploaded by

    Oleg Padurari
    This document discusses Network Address Translation (NAT) and Port Address Translation (PAT). It defines the key terms related to NAT such as inside local addresses, inside global addresses, outside local addresses, and outside global addresses. It explains the features of static NAT, dynamic NAT and PAT. It also covers benefits, configuration, verification, troubleshooting and common issues related to NAT and PAT.

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    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
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    You are on page 1of 15

    NAT and PAT

    This week.....

     RFC 1918
     Network Address Translation
    – Static and Dynamic
     Port Address Translation
     Configuration and testing
     Issues with NAT/PAT

    2 20 July, 2018
    Private Addressing

    3 20 July, 2018
    NAT

     A NAT-enabled device typically operates at


    the border of a stub network.

    4 20 July, 2018
    NAT Terms

     Inside Local Addresses – An IP address assigned to a host


    inside a network. This address is likely to be a RFC 1918
    private address.
     Inside Global Address – A legitimate IP address assigned
    by the NIC or service provider that represents one or
    more inside local IP address to the outside world.
     Outside Local Address - The IP address of an outside host
    as it known to the hosts in the inside network.
     Outside Global Address - The IP address assigned to a host
    on the outside network. The owner of the host assigns
    this address.
    5 20 July, 2018
    NAT Features
     Static NAT is designed to allow one-to-one mapping of local
    and global addresses.
     Dynamic NAT is designed to map a private IP address to a
    public address.

    6 20 July, 2018
    PAT Features

     PAT uses unique source port numbers on the inside global


    IP address to distinguish between translations.

    7 20 July, 2018
    NAT Benefits

     Eliminates re-assigning each host a new IP


    address when changing to a new ISP
     Eliminates the need to re-address all hosts
    that require external access, saving time and
    money
     Conserves addresses through application
    port-level multiplexing
     Protects network security
    8 20 July, 2018
    Configuring NAT and PAT

    9 20 July, 2018
    Configuring NAT

    10 20 July, 2018
    Configuring PAT

    11 20 July, 2018
    Verifying NAT and PAT
    Configuration

    12 20 July, 2018
    Troubleshooting NAT and PAT

    13 20 July, 2018
    Issues With NAT

    14 20 July, 2018
    Conclusion

     NAT can be static or dynamic


     Uses a set of predefined private addresses
     Conserves legal IPv4 addresses
     NAT plus PAT often used
     PAT uses unique source port numbers on the
    inside global IP address to distinguish between
    translations
     Provides a level of security

    15 20 July, 2018

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