[LINK] Does your ISP randomize the DNS source port?

[Rick Welykochy]

Karl Auer wrote:

> If you are behind a NAT device - and 99% of all home users are - your
> NAT is almost certainly derandomising the port numbers used. Only a test
> on the open Internet is really valid.
> 
> If you don't have access to the open Internet, let me know the DNS
> servers and I'll check them for you.

The page at http://www.doxpara.com/ reports that my DNS ports
are being randomised, using DNS server 220.233.0.34

I am behind NAT. Could you check this?
Or, if I am logged into a machine on the open Internet in a
bash shell, how can I check this myself?

But I am a bit puzzled by the fact that doxpara reports that
my DNS server is 220.233.0.34

Here is my resolv.conf on Mac OS X:

nameserver 220.233.0.4
nameserver 202.83.64.2
nameserver 202.92.65.254
nameserver 220.233.0.3

Nary a 220.233.0.34 to be found!


cheers
rickw


-- 
________________________________________________________________
Rick Welykochy || Praxis Services || Internet Driving Instructor

When the power of love overcomes the love of power,
the world will know peace.
      -- Jimi Hendrix