Question about how forwarders work

Richard Thomas Richard.Thomas at
Thu Dec 11 16:28:30 UTC 2014


Please could I have some advice about how the below example configuration would work:

forwarders { A.B.C.D; E.F.G.H; };

What I wanted to achieve is that one of the IP addresses to be used as a primary DNS server and the other IP address to be used as a secondary DNS server.

I have had differing results from testing that I have performed in my company and that of two other companies.

Company 1) - The result is that some DNS requests are sent to the first IP address and some are sent to the second IP address, even though both DNS servers are available.

Company 2) - The result is that DNS requests are sent to the first IP address and are only sent to the second IP address, if the first is down.

Company 3) - The result is that DNS requests are sent to the second IP address and are only sent to the first IP address, if the second is down.

Can anybody explain why there are differing results in different BIND environments please?

Also, if there is a way of configuring BIND to always work the way it's been observed for company 2), please could someone let me know.

Many thanks in advance.

Richard Thomas.
[] <>

The Logic Group sees a future where everything comes together. A future where every customer interaction paves the way for opportunity. Watch our video to find out more. <>

The Logic Group Enterprises Limited, Logic House, Waterfront Business Park, Fleet Road, Fleet, Hampshire, GU51 3SB, United Kingdom. Registered in England. Registered No. 2609323

General enquiries tel: +44 1252 776 700 email: info at <mailto:info at> visit: <>

The information in this email and any attachments are confidential and may be legally privileged and protected by law. It is for the intended recipient only. If you are not the intended recipient you may not use, disclose, copy, distribute, print or rely on the content of this email or its attachments. If this email has been received by you in error please advise the sender and delete the email from your system.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the bind-users mailing list