SimpleDNS allows recursion for IP address ranges (your subnets) and
specific IP addresses (your friend's static IP). It also allows several
responses to recursion requests from non-authorized hosts, including
responding with a "refused" error message, not responding at all (Len's
suggestion and my setting), or responding with a specific A or MX record
(porn -> disney.com suggestion). 

I've used SimpleDNS for years and can definitely recommend it.

Jeff Hitchcock - [EMAIL PROTECTED]



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Len Conrad
Sent: Friday, November 16, 2007 10:51 AM
To: [email protected]
Subject: RE: [IMail Forum] OT: Bombarded by bad DNS queries


>We use SimpleDNS (www.simpledns.com) and have had no problems.  Easy
>operation and allows you to turn off recursion

.. all or nothing recursion won't work, because recursion has to be:

1) allowed for his IPs

2) denied for not-his-IPs.

>  and has a "do not respond"
>feature which slows down any attacks....

You don't want to slow down, you want to ignore.

Len



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