Unfortunately, I have a need to access a network behind a Cisco VPN.  I didn't really want to install the Cisco Linux VPN client.  I found vpnc.  There are rpms that can be installed using yum.  
Here are the steps that I used to setup the connection. The assumption is that your logged in to your system as a userr and gnome is running.
You'll need the filename.pcf file, typically located in c:\Program Files\Cisco Systems\VPN  Client\profiles  
In Fedora, as root  do:
yum install vpnc  NetworkManagervpnc rdesktop   
If NetworkManger is  already running restart it. 
service  NetworkManager restart  
If you don't have  NetworkManager started do the following:
service  NetworkManager start
 service  NetworkManagerDispatcher start  
You should have a  NetworkManager icon in the sys tray. 
Left click VPN  Connections->Configure VPN
Click Add in the VPN  Connections box.
There should be a  Create VPN Connection box.
Click  Forward
Choose Compatible  Cisco VPN client. 
Click  Forward
Click the "Import  Save Configuration box  "
You may get an error  about TCP tunneling not being supported. I've gotten the same error and the connection  still works.  
In the Override  username enter your username.
In the Optional tab,  enter your domain name.  
Click Forward,   Apply, Close  
Your connection  should be setup now.   
Left click the  NetworkManager choose VPN Connections.
Choose the connection that you just  started
Enter your  password.
Enter the Group Password
Click  connect.
The group password is typically encrypted in the pcf file on the line encGroupPwd.  This password can be decrypted.  The instructions for this are located here.
Update: Removed duplicate sentences.
 
 
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