Since I have installed the S50 Signature Update for Cisco IDS v.4.1 on my IDS 4210, the alarm 995/1 fires at least twice a day. So I must reset my IDS.
Generally, alarms 3215 (iis dot dot execute bug), 3216 (www directory traversal ../..), 5081 (www winnt cmd.exe access), 5114 (www iis unicode attack), 5124 (www iis double decode error), 5249 (ids evasive encoding) and 5250 (ids evasive double encoding) fire (I have 50-70 alarms within 2 secondes) just before 995/1. Some times I also have alarm 993 (Missed packet count).
Before the S50 signature update, 4210 was out of the Lan and I never had any problem.
Since I have installed the S50 signature update, 4210 is linked to a hub between firewall and a packetshaper. But I must reset my 4210. The eventAction for alarms 3215, 3216, 5081, 5114, 5124, 5249 and 5250 is shunhost or reset/shunhost. I don't understand why I see all the alarms although the firewall should stop it (in the IDM the attacker is shunned).
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...