We're about to switch from our old ISP to a new one. How do I assign static ISP-assigned IP CISCO ASA interface? Should I define it under NAT or Access Rules? Is it easier through console?

2 Answers 2


You assign the interface IP under interfaces.

(Configuration->Device Setup->Interfaces)

ASDM vs Console is a matter of preference. I stopped using the console after ASDM 6.x got launched, as you can do everything there.

  • Found it! Thanks! Could I still keep my old ISP ip just as a backup? I am assigning the new one for outside network. Oct 27, 2011 at 16:04
  • Yes, you could - but then you'll need to use another interface or create VLAN's (wich requires a managed L2 switch at a minimum)
    – pauska
    Oct 27, 2011 at 17:52

In the ASDM, it's under "Interfaces".

On the command line:

interface g0/X
 ip address

And you'd probably also want a route for your new ISP, depending on exactly how you're coordinating the cut-over..

route outside 1
  • Is route outside for setting up the gateway? Oct 27, 2011 at 16:08
  • @servercooler Yes indeed. Oct 27, 2011 at 16:09
  • Can I assign more than one ip? Oct 27, 2011 at 16:23

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