DNS - Recursion question

Posted on 2005-02-28
Medium Priority
Last Modified: 2013-12-23
Hello, I hope this is the correct forum.  I searched and could not find a DNS category.  I have been working on DNS in a UNIX environment.  Can someone please explain why "DNS recursion requests are refused by externally facing DNS servesr" is important?  I am in the middle of preparing for an audit and this is one of the controls.  I don't understand why recursion is an issue for externally facing server; unless it has to do with external sources using my resources.  Thanks
Question by:Sportfury
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Accepted Solution

jlevie earned 900 total points
ID: 13425570
Not allowing recursion on an external facing DNS server for Internet queries prevents internet hosts from using your server as a general DNS server. That keeps the load off your server and Internet link. Note that if the server is also used as a DNS resource by inside machines an ACL needs to be in place to allow recursion for inside hosts.
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Assisted Solution

SunBow earned 600 total points
ID: 13432944
Sportfury > it has to do with external sources using my resources


It's also a little like the tree or rather, web of flow, need to control routes, paths, and congestion and validation, as well as for assigning just you is in charge (topology).

Author Comment

ID: 13441022
Thanks for the info!
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Expert Comment

ID: 13441348
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