04-02-2010 07:30 PM - edited 03-06-2019 10:27 AM
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?
04-02-2010 11:24 PM
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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04-08-2010 09:54 AM
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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