Re: Connecting to the Internet


--
D Roberts


"Chuck" wrote:

On Wed, 3 May 2006 23:07:02 -0700, D-Man <kolepagroup@xxxxxxxxx(donotspam)>
wrote:

"Chuck" wrote:

On Wed, 3 May 2006 20:20:01 -0700, D-Man <kolepagroup@xxxxxxxxx(donotspam)>
wrote:

Chuck:

More info. According to a Verizon tech I just finished talking to, the
modem is also the router, and 192.168.1.1 is it's IP address. The modem is a
Westell VersaLink 327W and I have reset it in the past while discussing the
problem with Verizon techs.

Regards,

Dan

DOHH. Of course, a combo modem router.

So look in the router status page ("http://192.168.1.1";) and see what the DNS
servers are setup as. And since owner-fb633300e is picking up the DNS settings
(ie same DNS server twice) from the DHCP server (the router), check the DHCP
settings and see if the dual entry is in the router DHCP server.

When you were talking to Verizon techs, did you mention the dual DNS entries?

Chuck:

Talked to a Verizon tech again. He had me reset the modem since the current
user and password for the unit were unknown.

Modem numbers are:
Currently the IP address is 71.113.9.129
Primary DNS 68.238.128.12
Secondary DNS 68.238.64.12

I just checked ipconfig/all and both the primary and secondary DNS IP
address's are still 192.168.1.1

Apparently, the owner-fb633300e is not picking up the current DNS IP
address's from the router. (beyond me)

I told him about the dual DNS entries and said it should not be a problem
since the DNS servers are supposed to be automatically detected.

Hope this information helps.

Regards,

Dan

Dan,

He's right - the dual, identical, DNS entries shouldn't be a problem - - if
there is no other problem.
<http://nitecruzr.blogspot.com/2006/03/dns-server-settings-on-your-computer.html>
http://nitecruzr.blogspot.com/2006/03/dns-server-settings-on-your-computer.html

But if there is a problem contacting the primary DNS server, the computer tries
to contact the secondary (and the tertiary, if defined, in turn). If there is a
problem contacting the last server in the sequence, you're out of luck.

The bottom line is that there should always be a primary and secondary server
available. DNS is essential to Internet access. But if you use a NAT router
for your DNS "server", you have no backup. How does this work?

I think the reasoning is that, as long as the NAT router is functioning, you're
OK. It's a single point of failure. If the router goes down, or can't be
contacted, having a secondary DNS server won't help, because you have no
connectivity. So the router, when it's up, simply relays the DNS requests to
the real servers, in your case 68.238.128.12 and 68.238.64.12.

Now the whole flaw in the primary - secondary sequence appears to be that the
primary always has a backup - the secondary. But the secondary (if no tertiary
is defined) has no backup. If you're using the secondary, and it goes down,
you're out of luck. That's when you restart the client - the computer, or in
your case, the router (modem).

Are you following me so far?

--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.

Chuck:

I think I have a grasp of what you are saying. It is more clear after
seeing the Primary DNS of 68.238.128.12 and the Secondary DNS of 68.238.64.12
in the DSL Connection Information for the Westell modem. What I don't
understand is when I look at ipconfig /all, both the Primary and Secondary
DNS IP numbers are 192.168.1.1 and the modem is showing the true IP
address's. Why doesn't Windows recognize the true Primary and Secondary DNS
address's? Or, is Windows only looking for the modem at IP address
192.168.1.1 and it (the modem) does not have or need a Secondary IP Address
which Windows would utilize?

Regards,

Dan


.

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