Re: SDM connection lost when applying firewall rules
The router that you are configuring must be using a Cisco IOS image that supports the Firewall feature set in order for you to be able to use Cisco Router and Security Device Manager (Cisco SDM) to configure a firewall on the router.
Refer the following url for more info on settinf firewall using SDM:
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...