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  1. Hi Rene,

    I dont know exactly what topic to place this question in thats why i am placing it here
    i got an opportunity for 3 days to work under a CCIE who was very rude and did not bother to ask him any questions as i knew he was not interested in explaining

    i was able to understand all bits till core SW through knowledge of your tutorials on VLAN and routing ,However cannot understand few bits in design at this point

    They got a public IP block from ISP lets say 90.81.31.128/27 30 host count

    Now the way the IP are assigned is as - 90.81.3.157 => ISP router LAN interface connecting to my ASA
    - 90.81.3.158 => Outside interface of my ASA

    Then there is CORE-SW- with different and server VLAN and few servers connected to server-vlan and require public access to them (web and email)[no-dmz].

    For the purpose hiding internal IP-scheme NAT is configured at ASA pointing to server as follows

    10.0.0.32 ===NAT===>90.81.3.132
    10.0.0.42====NAT====?90.81.3.142
    10.0.0.52====NAT====>90.81.3.152 ....

    So after all this lines my Question WHICH INTERFACE THIS IP 90.81.3.132 - 90.81.3.142 - 90.81.3.152 is assigned ,Where does this IP reside

    -Do this IP remain in company network

    please explain -As i know no one can expalain better than you in simple way

    OH ! ATTACHED IS A DESIGN LAYOUT

    Thanks in ADVANCE

  2. net2 says:

    Hi Rene,

    If I have many subnets inside my local network.
    How can I PAT all of subnets?

    Thank you!

  3. i did not understand that answer and did not expect this kind of answer

    thanks you any way

    that was help ful

  4. @Asi

    When you configure an IP address on the ASA then your ASA will know which IP addresses belong to the subnet. For example, let's say you have subnet 90.81.31.128/27.

    Once you configure 90.81.3.158/27 on the outside interface, your ASA knows that this is a subnet with 30 addresses. You can use any of the addresses in this subnet for NAT and you don't have to configure these addresses on the interface. Just make sure that it's not in use...

    @net2net

    You could use object groups to "bundle" multiple network objects. You could also configure a bigger subnet range in the network object.

    Rene

  5. ASA1(config)# object network INSIDE
    ASA1(config-network-object)# subnet 192.168.1.0 255.255.255.0
    ASA1(config-network-object)# nat (INSIDE,OUTSIDE) dynamic 192.168.2.253
    this tells our firewall to translate traffic from the 192.168.1.0 /24 subnet headed towards the OUTSIDE to IP address 192.168.2.253. If you configure the IP address like this then it has to be an IP address that is not in use on the interface. For example, when I try to use 192.168.2.254 (that’s the IP address on the OUTSIDE interface) then I will get an error

    Hi Rene,

    Can you please explain from the above statement if 192.168.2.253 is INSIDE GLOBAL OR DESTINATION IP in the packet that is sourced from INSIDE?

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