Linux VPNC leaving duplicate connections

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Linux VPNC leaving duplicate connections

L2 Linker

Hi all,

 

Environment Overview:

I have a 3 PA firewalls (connected in a hub-and-spoke fashion - 2 satellites, 1 portal.   All the client VPN traffic (VPNC for Linux, GlobalProtect for Windows) is routed from the satellites to the portal to a trusted network behind the portal.  

 

Issue Experiencing:

When a VPNC client (call it Client-A), connects to any firewall (call them PA-1, PA-2, PA-3), the connection works just fine.  When Client-A disconnects from PA-1and connects to PA-2, the connection works from the client side.

 

However, if you look at the GUI for PA-1, the connection for Client-A is still there even though Client-A is not connected to PA-1 anymore.   From the firewall perspective, it is as if Client-A is connected to PA-1 and PA-2 (but in reality is only connected to PA-2).  There have been instances where these "phantom connections" are on all three firewalls, but only one connection is a real VPNC connection.

 

Additional Points:

- I have changed the timeout settings for the client on the firewall side, this did not fix the issue.

- This is only specific to the Linux VPNC client, there are no problems with the GlobalProtect client for Windows.

 

I am really stumped on this one.  ANY insight to possible starting points is much appreciated.  

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