At my work I'm having an interesting issue. I am trying to map out ip space in certain areas of my network through firewalls and determine what IPs are active and not. The issue I am running into is that when I run NMAP or just a regular ping sweep I get a response no matter if there is a device on that IP or not.
Any ideas as to why this is? Is there a config in the firewall that could cause the firewall to respond to any port or ICMP sweep and act as the nonexistent device?
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...