I have a remote office within the same building connected through fiber to our Catalyst 3750. That remote office will be using a Cisco IP Phone 7961. I would like to shutdown the port that this phone is connected to during off-business hours so no-one at the remote office can plug a PC in and hack into our network. Is this possible? if not, what's the best way of accomplishing this?
For time-range ACL, you can allow other hosts (based on IP) to pass though and denied IPPhone within specific hour. But you need to know the tcp/udp port used by the service. Maybe denying the port that initiate the call will block all opening of the other ports used by the IPPhone.
Maybe you need to create time-range for the IPPhone and other TCP/UDP traffics. Permit other, except the IPPhone.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...