Cisco ASA Series Cli Configuration Manual page 1879

Chapter 1 Configuring Clientless SSL VPN
Understanding the hosts File
The hosts file on your local system maps IP addresses to host names. When you start Application Access,
clientless SSL VPN modifies the hosts file, adding clientless SSL VPN-specific entries. Stopping
Application Access by properly closing the Application Access window returns the file to its original
state.
Before invoking Application Access...
When Application Access starts....
When Application Access stops...
After finishing Application Access...
Note
Microsoft anti-spyware software blocks changes that the port forwarding Java applet makes to the hosts
file. See
anti-spyware software.
Stopping Application Access Improperly
When Application Access terminates abnormally, the
VPN-customized state. Clientless SSL VPN checks the state the next time you start Application Access
by searching for a hosts.webvpn file. If it finds one, a
(Figure
Once you shut down Application Access improperly, you leave your remote access client/server
applications in limbo. If you try to start these applications without using clientless SSL VPN, they might
malfunction. You might find that hosts that you normally connect to are unavailable. This situation could
commonly occur if you run applications remotely from home, fail to quit the Application Access window
before shutting down the computer, then try to run the applications later from the office.
Reconfiguring a Host's File Automatically Using Clientless SSL VPN
If you are able to connect to your remote access server, follow these steps to reconfigure the host's file
and re-enable both Application Access and the applications.
Detailed Steps
Step 1
Start clientless SSL VPN and log in. The home page opens.
Step 2
Click the Applications Access then Start Applications, a
(See
www.microsoft.com for information on how to allow hosts file changes when using
1-8) appears, and Application Access is temporarily disabled.
Figure 1-8.)
Application Access User Notes
hosts file is in original state.
•
Clientless SSL VPN copies the hosts file to
hosts.webvpn, thus creating a backup.
•
Clientless SSL VPN then edits the hosts file,
inserting clientless SSL VPN-specific
information.
•
Clientless SSL VPN copies the backup file to
the file, thus restoring the hosts file to
hosts
its original state.
•
Clientless SSL VPN deletes hosts.webvpn.
hosts file is in original state.
file remains in a clientless SSL
hosts
Backup HOSTS File Found
Backup HOSTS File Found
Cisco ASA Series CLI Configuration Guide
error message
message appears.
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