DNS Settings

DNS is the system used to associate standard IP addresses with host names. This system can tie up valuable Proxy Server resources if not configured wisely. To optimize performance, consider the following:

• Enable DNS Caching

  DNS Caching is enabled by choosing the Configure DNS Cache link under the Preferences tab of the Server Manager. Select the Enabled radio button for DNS caching.

• Do not log client DNS names– log only client IP addresses

  Client DNS name logging is disabled by choosing the Set Access Log Preferences link under the Server Status tab of the Server Manager. Select the IP Addresses radio button to log IP addresses rather than client host names.

• Disable reverse DNS

  Reverse DNS translates IP addresses into host names. Reverse DNS is disabled by choosing the Configure System Preferences link under the Preferences tab of the Server Manager. Select the No radio button to disable reverse DNS.

• Avoid access control based on client host names

  Use clients’ IP addresses instead of host names (if possible) in access control statements.