DNS cache poisoning attacks

[Jeremy C. Reed]

On Sat, 23 Aug 2008, EL MAAYATI Afaf wrote:

>             As recommended, I've upgraded my DNS server to the version 
> BIND 9.5.1b1 <http://www.isc.org/sw/bind/view?release=9.5.1b1> . But I 
> still have the message indicating that my server is still vulnerable
>  
> # dig @192.168.2.3 +short porttest.dns-oarc.net txt
> Porttest.y.x.w.v.u.t.s.r.q.p.o.n.m.l.k.j.i.h.g.f.e.d.c.b.a.pt.dns-oarc.net.
> "192.168.2.3 is POOR: 26 queries in 6.4 seconds from 1 ports with std dev 0"
>  
> Is there anything that I've missed?

Make sure it was restarted with correct new named.

Make sure you aren't limiting the ports with a query-source.

Make sure that a packet filter isn't rewriting the random ports to 
unrandomize them.