testing vulnerability against secondary NS

Barry Margolin barmar at alum.mit.edu
Tue Aug 12 01:04:05 UTC 2008


In article <g7qi0d$6cj$1 at sf1.isc.org>,
 "Chris Henderson" <henders254 at gmail.com> wrote:

> I am testing the recent DNS vulnerability against my secondary name server
> from my local machine
> ("dig @<ip_of_nameserver> +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.

Are you sure your secondary server isn't forwarding to the primary?

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE don't copy me on replies, I'll read them in the group ***


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