DNS Nameserver Spoofability Test
Should you trust the Domain Name Servers you are using?

Frequently Asked Questions

Q:The DNS Spoofability page appears to crash my Internet connection!
A:(Long domain names & poor router firmware.)
Q:Is there a work-around for the router crashing problem?
A:Yes! Configure your PC to use your ISP's DNS servers...
Q:Why do you use the term “proven entropy” and should I worry if my nameservers have low proven entropy?
A:...

Mention SN podcast and transcripts, etc.
Mention VMWare changes external DNS querying behavior.
Personal Firewall Crash...
> Jetico Personal Firewall v1.0 Freeware version > Firewall server version: 1.0.1.61 > Firewall user interface version: 1.0.1.86 > > Though the router crash test didn't crash my router my JPF v1.0 did crash. > (twice) > > I did a search in this newsgroup about subject "Jetico" and only read info > from 2005. Is anyone still using it?
Q:I want to show/send this to my ISP, how can I do that?
A:Firefox free "ScreenGrab! add-on works perfectly...
Q:Page loads but images take a long time...
A:(The Ninho problem, first believed to be Chrome, now IE. So his connection.
Q:What's actually going on? What's being done? How does this testing work?
A:See the Custom testing page...
Q:My computer is configured to use different DNS servers than your test shows, what's going on?
A:...
Q:I've run the test a few times. It finds many DNS nameservers — like 12 to 15 — each time. But why does it find different numbers?
A:It would be great if this "server search" could be a precise process. But it's a bit like shaking fruit out of a tree: We're doing everything to shake the tree really hard, and we're being VERY patient waiting for as much fruit to drop out as is likely.


GRC's DNS Nameserver Spoofability Testing Pages:
DNS Tests Usage Statistics:
 Standard   CustomCrashTest
Daily Usage:82111
Total Usage:33,0238629,341

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Last Edit: Oct 11, 2009 at 09:51 (156.25 days ago)Viewed 3 times per day