We have an ASA5520 with 3 active VPN connections, currently with one active Public interface on a DSL link (8 IP addresses), and an EOL PIX 515 VPN with 7 VPN connections on another Public network (10Mb connection, Class C network).
We need to migrate the VPN tunnels from the 515 to the 5520. I would like to create a new Public Interface on the 5520 in the 10Mb Class C pool, and migrate the 515 tunnels over to this, then move the 3 existing VPN tunnels onto this 10Mb network. Finally, decommission the DSL link and interface.
First, can the ASA5520 support VPN configuration with 2 separate Public IP interfaces, and Second, if this is possible, could I get a configuration example of this setup?
Yes ASA5520 supports VPN configuration for more than one public IP. But...
ASA or PIX cannot have IPs assigned in same subnet to interfaces. For example if you assign the ip address of xxx.xxx.xxx.50 255.255.255.248 from your 8 IP addressed public octet, you can not assign another IP in this subnet to another interface.
Thank you for this fast response! Even if there are typo's, I can proceed with this project using this information. (Just needed confirmation before proceeding). I am suprised that Cisco does not have this scenario posted as an example, I would think that it would be fairly common to have a single device with 2 separate Internet links, and VPN connections on both of them...
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...