Consults on PIX525 the ICMP agreement response question
The unit with PIX525, the ICMP agreement has let loose, to in the internal network only can PING to PIX525 boring, other all not be able PING, (outside visit net to be normal) do ask what question is?Below is disposes, thanks!
Re: Consults on PIX525 the ICMP agreement response question
Chen, I think I understand your question please correct me if Im wrong. Your inside hosts are trying to ping hosts on the oustide internet, if this is whatI understand you need to re-do your icmp access list for imcp or follow bellow options.
1- One option is to use acl similar to the example in link.
access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any source-quench
access-list 101 permit icmp any any unreachable
access-list 101 permit icmp any any time-exceeded
access-group 101 in interface outside
2- Second option is to modify your global firewall policy to inspect imcp.
please refer to this link to understand how PIX/ASA handles ICMP.
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...