Add NAT to allow AnyConnect VPN to access local subnets
I've recently factory reset our ASA (moved buildings) and it's all up and working now and users have local desktop Internet access.
I'm now configuring the AnyConnect client and when connected my laptop can access our remote subent where our servers are via the inside interface and over a WAN link, but not a subnet local to the ASA in our LAN.
The VPN subnet is 172.29.11.x/24 and I added a NAT which seem to fix this issue, but stop access to the internet from the local desktops. SO I removed to get it working again. What NAT statement should I add to allow 172.29.11.x/24 to access the local Subnet 172.29.12.x/24 and keep the Internet working?
Add a NAT exemption line between your VPN subnet and LAN subnet, so that this traffic does not get translated. Also, the dynamic NAT for internet access wont be affected as the exemption only works between VPN and local LAN subnets.
Look at the nat exemption configuration given in this guide:
Great. The same guide will have a section to configure "Split Tunneling". This allows VPN access for the networks that you need (Office LAN). The rest of the networks should take your existing default route via your client ISP.
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...