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  1. sims says:

    Hi Rene ,

    Could you explain twice nat and use cases also ?

    Thank you

  2. Hi Sims,

    I will, added it to the list.


  3. Hi Rene,

    Need help again, So its NAT this time.

    ASA1(config)# object network WEB_SERVER
    ASA1(config-network-object)# host
    ASA1(config-network-object)# nat (DMZ,OUTSIDE) static

    Let's call this statement A.

    The configuration above tells the ASA that whenever an outside device connects to IP address
    that it should be translated to IP address

    ASA1(config)# object network DMZ
    ASA1(config-network-object)# subnet
    ASA1(config-network-object)# nat (DMZ,OUTSIDE) static PUBLIC_POOL

    Let's call this statement B.

    The configuration above tells the ASA to translate any IP address from the subnet DMZ ( /24) to an
    IP address in the PUBLIC_POOL ( /24).

    Both NAT statement`s are similar except one has a IP other has a POOL.

    statement-A is performing translation for the inbound traffic
    statement-B is performing translation for outbound traffic

    My question is what part of command makes ASA to perform translation on INBOUND traffic or OUTBOUND traffic and on which interface.

  4. hi Rene Thanks for the reply
    i got most of it ,Actually my confusion started by reading the following configuration from cisco. For last if you can explain short and simple on waht is REAL_ifc and MAPPED_ifc from the below example this will make it crystal clear

    Thanks in Advance
    nat (real_ifc,mapped_ifc) dynamic mapped_obj [interface] [dns]

    hostname (config-network-object)# nat (inside,outside) dynamic MAPPED_IPS interface
    Configures dynamic NAT for the object IP addresses. See the following guidelines:

    ***Interfaces —If you do not specify the real and mapped interfaces, all interfaces are used. You can also specify the keyword any for one or both of the interfac

  5. maher1 says:

    Hi Michael,

    Normally it should work as Rene has previously explained because the direction doesn't matter for the ASA, the only thing that matters is what to translate. If you want that the request is sourced from the inside, you can specify "unidirectional" by end of the command of nat(inside,outside) static so the destination addresses cannot initiate traffic to the source addresses.

    Hope this can help.

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