I have an IOS device set to be a bridge that is sitting between a customers site and the Internet. I would like to be able to block traffic from passing through the bridge selectively, ie to prevent UDP/137 from hitting the customers firewall. Is this at all possible?
The bridging software allows you to create access lists to administratively filter MAC addresses. Also, since you are routing on certain interfaces, you can apply a normal access list to filter traffic based on IP/Port. Between these two options, you should be able to stop all the traffic you want to.
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...
[toc:faq]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 and UDP are I...