"if the tunnel is created via the client, do I need any additional lines allowed for specific networks he needs to get to, or should everything be allowed via the established VPN connection?"
So the client was establishing a VPN from his laptop through the firewall to his companies network ?
If so once the tunnel is created all traffic should be allowed via the tunnel ie. in effect you are punching a hole through your firewall. The firewall only sees IPSEC traffic, it does not know about the remote networks as they will be tunneled through the VPN.
Are you Natting source addresses as they go through the firewall ?
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...