This doesn't meant PIX is blocking the traffic, merely a notification. Your SNMP session should be still running fine.
Besides below explanation, we have seen this message appears when PIX is denying any translation for any connection/session between hosts within internal network itself.
%PIX-3-106011: Deny inbound (No xlate) string
The message will appear under normal traffic conditions if there are internal users that are accessing the Internet via a web browser. Anytime a connection is reset, when the host at the end of the connection sends a packet after the firewall receives the reset, this message will appear. It can typically be ignored.
Recommended Action: Disable this syslog message from getting logged to the syslog server by entering the no logging message 106011 command.
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...
[toc:faq]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 and UDP are I...