Leased address in an ACL?

Unanswered Question
Apr 2nd, 2010

I have an 1841 router that gets it's internet-facing interface's address by my ISP's DHCP server. How can I use that address in an ACL, in a way that it will stay effective when it gets a new leased address?

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Ganesh Hariharan Fri, 04/02/2010 - 23:24
I have an 1841 router that gets it's internet-facing interface's
address by my ISP's DHCP server. How can I use that address in an ACL,
in a way that it will stay effective when it gets a new leased address?


Hi,


If your question is ACL needs to bind the ip address assigned from your isp and it should change automatically when ip address changes then i think you cannot configure access-list to reference to the DHCP assigned ip address dynamically.


Hope to Help !!


Ganesh.H


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onyxwolf_x Thu, 04/08/2010 - 09:54

Wow that sucks! No work around to this? I want to block spoofed traffic with the same address as my external interface as well as allow ssh (over a specific port) to that interface only.


Its weird that ACL are the only things you can't define by interface vs. ip address. I guess it is what it is!

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