I've configured a 1601 for ISP dialup using an external modem. I want to lock all the services down so that anyone sniffing the connection sees nothing.
I have turned of IP HTTP SERVER and FINGER, but cant find a way of turning off / disabling the TELNET SERVICE. The ip address of the serial interface is negotiated on dialup and I'm not using TRANSPORT INPUT ALL on the LINE interface.
I'm currently also using the following access list :-
access-list 100 deny ip any host 172.16.200.255
access-list 100 permit ip any any
dialer-list 1 protocol ip list 100
enabling only my network to see out.
Any help or suggestions on locking down port 23 on the serial interface would be greatfully received.
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...