We have been receiving alerts for this alarm. It seems that someone is trying to spoof the host IP to check for vulnerabilities. Is there a way at all to find out the real source IP of the attacker trying to spoof the IP address? Here is the alert we receive from the IDS sensor
As far as I am aware the only way to trace this is to take a sniffer and move it from segment to segment
> locate the sniffer at the segment that you are receiving the localhost packets, obtain the MAC address, and trace it to the device. If it is a router MAC then move to the next segment behind the router until you find the virus-infected 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...