Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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Source NAT pool combined with routing

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  • 1.  Source NAT pool combined with routing

    Posted May 24, 2017 10:05 AM

    Situation:

    • Client connects on wireless Guest network on remote office (local controller)
    • Client gets redirected to Clearpass (10.10.10.1)
    • Connection is routed through ipsec tunnel

    Problem:

    • It is not possible to create a route back to the client range (overlapping ranges)
    • it is not possible to create route back to the local controller (overlapping ranges)

    To bypass the overlapping ranges-issue, a dummy ip and vlan were created on the local controller.

    This is used for radius packets:

    2017-05-24_15h52_11.png

    For Radius this is working fine.

     

    We also want to use this for showing the guest portal to the client.

    Tried to change the Policy

    • adding a 'route' rule:
      2017-05-24_15h55_22.pngThis results in a connection to the clearpass, but with the 'controller ip' instead of the 'dummy ip' (so the routing back doesn't work)
    • adding a 'source nat' rule:
      2017-05-24_15h57_44.pngThis even doesn't result in a connection to the clearpass, or doesn't show a connection on the controller (using show datapath session table <clientip>)

    Any idea on how to combine both? (using routing with a source nat, defined by the source nat pool)

     

    A overview drawing can be found below:2017-05-24_15h41_31.png



  • 2.  RE: Source NAT pool combined with routing

    Posted May 24, 2017 03:41 PM
      |   view attached

    Can you share the following please:

     

    show ip nat pool

    show ip interface brief

     

     

    Attachment(s)

    txt
    new1.txt   5 B 1 version


  • 3.  RE: Source NAT pool combined with routing

    Posted Jun 20, 2017 06:57 AM

    Hi Clembo,

    Please find the output below.

     

    (Local) #show ip nat pool

    NAT Pools
    ---------
    Name Start IP End IP DNAT IP Flags
    ---- -------- ------ ------- -----
    nat_dummy_ip 192.168.238.10 192.168.238.10 0.0.0.0
    dynamic-srcnat 0.0.0.0 0.0.0.0 0.0.0.0


    (Local) #show ip interface brief

    Interface IP Address / IP Netmask Admin Protocol
    vlan 2 192.168.10.254 / 255.255.255.0 up up
    vlan 1 10.10.0.10 / 255.255.255.0 up up
    vlan 1000 192.168.238.10 / 255.255.255.0 up up
    loopback unassigned / unassigned up up
    mgmt unassigned / unassigned up down