Administration > DNS Override

Use the Administration > DNS Override page to use specific host names and IP addresses instead of using Domain Name System (DNS) servers to translate host names into IP addresses. Host names that you enter by using this page will be resolved to the corresponding IP address for all Google Search Appliance acitivities, activities, such as crawling and serving.

Enter host name and IP address in the following format:

hostname [one or more spaces] IP address

Host names can be relative (for example, host) or absolute (for example, host.google.com). Although host names can be relative for DNS override, Start URLs on the Content Sources > Web Crawl > Start and Block URLs page cannot be relative hostnames.  You must enter fully qualified domain names for start URLs.

DNS override supports wildcard domains. In the following example, there is one host name and IP address on the page: www.google.com 1.1.1.1

In this case, www.google.com 1.1.1.1 applies to www.google.com, *.www.google.com, google.com, and *.google.com

In the second example, there are two host names and IP addresses on the page:

• www.google.com 1.1.1.1
• google.com 2.2.2.2

In this case:

• www.google.com 1.1.1.1 applies to www.google.com and reader.www.google.com
• google.com 2.2.2.2 applies to reader.google.com

To use DNS override:

1. Enter host names and IP addresses in the box, one per line.
2. Click Save.

For each cname that the search appliance crawls, add a DNS override for the "A" record that the cname points to. Otherwise, the search appliance continues to use the IP address returned for the A record.