I am trying to block intrusion on DNS servers on Internet edge FWSM. Usually during an event there are a lot of (limit ia 1 Million) connection on DNS servers whic trigger FWSM mem and cpu to 100%. I have reducede UDP idle time to 1 minute.
What are other suggestions. I don't have IPS. The only defence is on FWSM. Can I create a policy that would limit number of connections from an outside source to say for example 500.
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...