I have a remote sensor (4230) that just slowly stopped sniffing traffic. Right now all it sees are ARP (netbios) requests. This sensor is plugged into a brand new hub, with new cabling.
According to the log the sensors sniffing interface will come up for 1 minute then go down and stay down for 40 minutes. FYI this sensor has been replaced once (same problem). Are we looking at something environmental? Or a known bug? This sensor is configures the same as many others that we manage, yet it is the only one exhibiting this problem.
a few questions: If you unplug the cable then plug it back in, does the traffic start up again? Have you tried snooping the traffic to see if there is anything unusual right before it stops? Try doing a snoop with netrangr stopped. Does the traffic still quit after 1 minute. try connecting the sniffing interface to the same place as the command/control. Do the snoop. does traffic die there also??
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...