Recovering From Hosts File Errors When Using Application Access - Cisco FirePOWER ASA 5500 series Configuration Manual

Configuring Application Access

Recovering from hosts File Errors When Using Application Access

The following errors can occur if you do not close the Application Access window properly:
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These errors can result from terminating the Application Access window in any improper way. For
example:
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This section includes the following topics:
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Understanding the hosts File
The hosts file on your local system maps IP addresses to host names. When you start Application Access,
WebVPN modifies the hosts file, adding WebVPN-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 www.microsoft.com for information on how to allow hosts file changes when using
anti-spyware software.
Cisco Security Appliance Command Line Configuration Guide
37-18
The next time you try to start Application Access, it might be disabled; you receive a
error message.
File Found
The applications themselves might be disabled or might malfunction, even when you are running
them locally.
Your browser crashes while you are using Application Access.
A power outage or system shutdown occurs while you are using Application Access.
You minimize the Application Access window while you are working, then shut down your
computer with the window active (but minimized).
Understanding the hosts File
Stopping Application Access Improperly
Reconfiguring a hosts File
Chapter 37
hosts file is in original state.
WebVPN copies the hosts file to
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hosts.webvpn, thus creating a backup.
WebVPN then edits the hosts file, inserting
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WebVPN-specific information.
WebVPN copies the backup file to the
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file, thus restoring the hosts file to its original
state.
WebVPN deletes hosts.webvpn.
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hosts file is in original state.
Configuring WebVPN
Backup HOSTS
hosts
OL-10088-01