If it's a slave one way to force tests to it might be to temporarily
stop named on the primary so queries have to use the slave.

-----Original Message-----
From: bind-users-bounce@isc.org [mailto:bind-users-bounce@isc.org] On
Behalf Of Kevin Darcy
Sent: Tuesday, August 12, 2008 12:51 AM
To: bind-users@isc.org
Subject: Re: testing vulnerability against secondary NS

Chris Henderson wrote:
> I am testing the recent DNS vulnerability against my secondary name

> from my local machine
> ("dig @ +short porttest.dns-oarc.net TXT" and also
> "nslookup -querytype=TXT -timeout=10 porttest.dns-oarc.net.")
> But strangely it is giving me the result of my primary name server!

Every time
> I try to query, it gives me back my primary name server's result. I

also tried
> doxpara.com and https://www.dns-oarc.net/oarc/services/dnsentropy
> My local machine's /etc/resolv.conf has only one nameserver entry - my
> secondary name server.
> Also, if I try to resolve a hostname I can query my secondary name

server and
> get the answer back. So I know my secondary name server is working.
> Does anyone know how can I test the vuln. against my secondary name


Well, what's the config of your so-called "secondary nameserver"?

Does it just forward to the "primary"?

If so, then that's where the queries will be seen to originate, by the
vulnerability-testing tools.

Another possibility is that you have a NAPT device multiplexing both
your "primary" and "secondary" nameservers into single address. Since it

would need to use different port numbers to accomplish this, the exact
implementation/configuration details of the NAPT would have an effect on

whether you get a "good" or "ok" result from the vulnerability-testing

- Kevin
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