Monitoring of VPN traffic

If a user connects using the AnyConnect client, and then connects via RDP to an internal Windows machine, I'd be able to see all traffic via syslog from the RDP session?  I can see the client login, auth, DHCP, then the port 3389 in order to connect to the internal area of Windows, but only once the connection on port 3389 traffic (and subsequent termination of the VPN session at the request of the user).  It seems that there is a kind of traffic through the ASA to the VPN client, at least at the level of the presentation layer.  Asked me to look at this to determine if a person was actually connected and work or if they have just connected to make it look like they were doing their job.

Also, in the same sense - is there a difference shown when a session ends for max of the session and a user actually disconnection?  The reason why I ask this question is the above user has been connected for exactly 12 hours, which is the Max connection time (720 minutes), but the newspaper it says was by the request of the user.  My guess is that it was a max session timeout but I have to be positive about that.

Thanks in advance...

If the RDP user in a device, the activity that takes place during the RDP session would be from this device to other applications. When you're talking about syslog, I guess you see syslog messages when the RDP box creates an outgoing link or other subnet that goes through the ASA and ASA sends syslog messages?

If you want to see activity in the RDP session, you need check the outbound RDP host connection, and for the SAA trigger and send syslog, traffic from the host RDP must pass through the ASA.

Example:

Connect to it via RDP 192.168.1.5 and AnyConnect.

If you want to check the activities, you will need to check if 192.168.1.5 launches all connections.

In regards to the max session disconnects, can you please share the syslog message which specifies that.

Hope that helps.

Tags: Cisco Security

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