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Chapter 4 Configuring the Appliance 47
Configuring DNS
The DNS Configuration section lets you configure DNS services. The following
table describes the options.
Using the Snapshots page
The Snapshots page lets you take snapshots of the selected appliance’s
configurations or lets you restore previously saved configurations. A
configuration snapshot consists of a complete set of appliance configuration files.
Note It is a good idea to take a snapshot before doing system maintenance or
attempting to tune system performance. Taking a snapshot only takes a few
seconds and it can save you hours of correcting configuration mistakes.
Option Description
Resolve
attempt
timeout
Specifies how long the appliance must wait for the DNS server
to respond with an IP address, even if the client request has
been cancelled. You can choose from the following:
❚ 5 seconds
❚ 10 seconds
❚ 15 seconds
❚ 20 seconds
❚ 30 seconds
If the user abandons the request before this timeout expires,
the appliance can still obtain the host’s IP address in order to
cache it. The next time a user makes the same request, the
address will be in the cache.
Number of
retries
Specifies how many times the appliance should allow a lookup
to fail before it abandons the lookup and sends an invalid
hostname message to the user. You can choose from the
following:
❚ 1
❚ 2
❚ 3
❚ 4
❚ 5