I only want IP addresses on a specific subnet to be able tos end smtp traffic to my email server. I have tried the following access-lists but cannot get traffic to pass.
access-list acl_grp permit tcp host myipaddress host theirsubnet eq smtp and I reversed the order of the addresses. I am wondering if the access-list command does not recognize entire subnets? example: 18.104.22.168 ?
It handles subnets fine but you have to use that syntax. Instead of "host subnet" you need "subnet subnet-mask". And from what you wrote about the purpose, I think you need to reverse the source/dest, assuming the ACL gets applied to the outside interface.
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...