If you review the basics of the VPN it may answer your question.
Crypto-map= identifies interesting traffic to initiate VPN
ACL= identifies what can communicate across the VPN, if enabled in crypto and disabled in ACL. It ain't happening
You wish to allow a subnet so the traffic has to be matched in the crypto to initiate the tunnel. The traffic then also matched by the acl is then allowed. If you wish you can consider this a double acl. If you do not match both, then you won't get through. All hosts matching will initiate the tunnel.
In summary, if you wish to allow a single host to initiate a 2-way VPN and then allow traffic in both directions.
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...