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mahir's avatar
mahir
Icon for Altostratus rankAltostratus
Feb 20, 2020

Resolution Using a DNS Resolver Cache

I would like to configure my DNS box as a resolver. I have applied all the steps as described in the following link https://devcentral.f5.com/s/articles/configuring-the-f5-big-ip-to-perform-name-res...
BIG-IP
BIG-IP DNS
security
insidertricksnet's avatar
insidertricksnet
Icon for Nimbostratus rankNimbostratus
May 23, 2023

To configure the GTM (Global Traffic Manager) to perform name resolution using specific external public IPs, you can follow these steps:

  1. Log in to the GTM configuration utility.
  2. Go to the "DNS" section and select "DNS Resolver".
  3. Under "Name Server Configuration," you should see a list of configured DNS servers.
  4. Edit the existing DNS server or create a new one if needed.
  5. In the "Root Hints" section, you'll find a list of IP addresses for root DNS servers. Remove any IP addresses that you don't want the GTM to use for resolution.
  6. Add your desired external public IPs (XXXXX and YYYYY) to the "Root Hints" section. Make sure to follow the correct format (IP address/32).
  7. Save the configuration changes.

By modifying the "Root Hints" section and removing unwanted IP addresses while adding your desired external public IPs, you can ensure that the GTM only consults the specified IPs for name resolution.

Please note that the exact steps and terminology may vary depending on the version of the F5 BIG-IP software you are using. It's always a good practice to consult the official documentation or seek assistance from F5 Networks or their support community for specific instructions related to your GTM version.

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