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Re: "http://www33.not-found-entry.org/search?qo=..." is default "server not found" page

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Eddy Nigg (StartCom Ltd.)

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Sep 26, 2007, 5:02:43 AM9/26/07
to kol...@gmail.com, dev-se...@lists.mozilla.org
Or perhaps some unwanted ad-aware. Sounds like one of those small
programs which sneak so frequently into Windows when installing some
free-ware programs. This is likely, if this wasn't a change you made...

kol...@gmail.com wrote:
> Mac OS X 10.4.10
> Firefox 2.0.0.7
>
> Whenever I enter a domain that does not exist, I am automatically
> forwarded to the url:
> http://www33.not-found-entry.org/search?qo=...
> Where ... is the nonexistent domain name.
>
> Consequently, this happens in Safari as well, which makes me think
> it's a setting somewhere on my Mac, but it can't hurt asking here.
>
> Thoughts? Is this a new exploit for Mac OS X? Thanks!


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Regards

Signer: Eddy Nigg, StartCom Ltd. <http://www.startcom.org>
Jabber: star...@startcom.org <xmpp:star...@startcom.org>
Blog: Join the Revolution! <http://blog.startcom.org>
Phone: +1.213.341.0390

Frank Hecker

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Sep 27, 2007, 11:21:03 AM9/27/07
to
kol...@gmail.com wrote:
> Mac OS X 10.4.10
> Firefox 2.0.0.7
>
> Whenever I enter a domain that does not exist, I am automatically
> forwarded to the url:
> http://www33.not-found-entry.org/search?qo=...
> Where ... is the nonexistent domain name.
>
> Consequently, this happens in Safari as well, which makes me think
> it's a setting somewhere on my Mac, but it can't hurt asking here.

This might be a consequence of your DNS settings. Look at the file
/etc/resolv.conf and see what it gives for "nameserver". Also look in
your system preferences under the network settings to see if there's a
setting there for "DNS Servers".

There are commercial services like OpenDNS (http://www.opendns.com/)
that provide DNS name resolution services at no charge in return for
displaying ads when you enter a name that's not found. You appear to
have encountered a similar service, which may or may not be a legitimate
business.

Note that on OS X (I think by default) the system DNS server settings
can be blank, with OS X getting its DNS server information as a
byproduct of getting an IP address through DHCP. So if you connect to
the net using DHCP (which is almost always the case for consumer Macs)
then the network operator can supply their own DNS server information,
and pull tricks like the one you encountered.

Do you see this on your home network, or when you're on a "foreign"
network, e.g., hotel network, public wifi hotspot, etc?

Frank

--
Frank Hecker
hec...@mozillafoundation.org

Brendan

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Oct 4, 2007, 12:04:26 AM10/4/07
to
This may be a lot simpler then you think ;)

Who is your ISP? I have InsightBB as mine and I have the same issue.

Your computer is most likely set to obtain it's DNS automatically.

What's happening is your computer is making a request to the DNS
server for www.domain_that_does_not_exist.com to the DNS server that
is has obtained automatically (your ISPs). I don't know the specifics
on the server side, but this in turn initiates a process where in you
request is redirected on the server side and you are delivered the
offending page in your browser.

I troubleshot as follows:

1) I did a ping on a domain that does not exist (fdfddfdf.com) and it
returned an IP address and then timed out.

2) I did a reverse lookup on that IP address and it resolved to
ns1.level3.com.

3) I then did a tracert on the same domain name. It made it's way to
unknown.level3.com and then timed out.

I started to think, "Hmmmm".

Changed my DNS settings to a different nameserver. Problem went away.

Call you ISP and complain.

Brendan Canty

On Sep 27, 11:21 am, Frank Hecker <hec...@mozillafoundation.org>
wrote:

cb

unread,
Oct 8, 2007, 12:16:32 AM10/8/07
to
On Oct 4, 12:04 am, Brendan <bca...@gmail.com> wrote:
> This may be a lot simpler then you think ;)
>
> Who is your ISP? I have InsightBB as mine and I have the same issue.
>
> Your computer is most likely set to obtain it's DNS automatically.
>
> What's happening is your computer is making a request to the DNS
> server forwww.domain_that_does_not_exist.comto the DNS server that

Here is an easy way to fix the problem. Click the "About" at the
bottom of the page (http://www33.not-found-entry.org/options) and you
will be able to change what page is displayed.

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