I have a network of ASA's set to send syslog to a syslog server. When you first set the ASA to log to syslog it all works, but after a while it stops sending. Then if you reset (turn off logging, turn it back on again) it will start logging until it quietly fails again.
I had this problem yesterday and figured it out. I had "logging console debugging" enabled which was killing the logging queue. Also, it may benefit you to look at the logging queue size or set the rate limit.
I don't have logging console debugging. I tried changes to the queue size and rate limit previously, but it does not look like a queue or limit problem. It seems that just resetting the logging settings gets it going again.
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...