ServerBuddies Support Blog

Advanced tool to enable/disable recursive DNS lookups

DNS recursion support is defined under BIND 9, using the `recursion’ and the `allow-recursion’ directives, as part of the options grammar.

Download

http://download.swsoft.com/ensim/download/pro/linux/kb/2344/recursivedns

Installation Instructions

Download the script and copy in “/usr/lib/opcenter/bind/” directory.

recursivedns : ‘recursivedns’, allows you to modify the DNS recursion settings for your EPL server.

Invoking the script

To display the recursion settings, just run `recursivedns‘
To turn on recursion support, run `recursivedns on‘
To turn off recursion support, run `recursivedns off‘
To allow recursion to all hosts, run `recursivedns +all‘

To disallow recursion to all hosts, run `recursivedns -all‘
To allow recursion to a particular host, run `recursivedns +HOST‘
To disallow recursion to a particular host, run `recursivedns -HOST‘
To display the usage, run `recursivedns –help‘

If you want to change the settings for recursive domain name service:

Go to Home > DNS Settings (in the Server group) > DNS Recursion.

Select the option you need:
* To allow recursive queries from all hosts, select Allow for all requests.
* To allow recursive queries from your own server and hosts from your network, select Allow for local requests only.
* To allow recursive queries only from your own server, select Deny.
Click OK.