Here\’s how you can quickly list the currently active IPSec VPN sessions on your ASA.
show vpn-sessiondb remote
You can of course use modifiers to filter only the text you\’re interested in. For example
show vpn-sessiondb remote | include (Username|Duration)
This will give you the username and duration of the session.
You can also get a summary of all the connections as follows
show vpn-sessiondb summary