Is it possible to replace a Cisco VPN IPSec concentrator with Ubuntu and for instance Strongswan?
1) Do Strongswan implement the same protocolls that Cisco uses?
2) Can we retrieve keys from the Cisco concentrator and import them to the Ubuntu-box, if not can we generate new keys that suits equipment at sites?
3) Are there any performance concerns to think of?
Best Answer
I'm sure you can find examples of remote-access VPN and site-to-site VPN configuration for Strongswan listed here helpful.