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Reverse DNS issue

Last response: in Networking
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August 31, 2004 6:46:40 AM

I am currently with Comcast cable but wanting to switch to Verizon DSL to save money. Everything works fine with Comcast. Installed DSL modem, modem shows all lights green and steady. However, the only way to access any internet page is by typing in the DNS address.

If I type in the http://www.whatever.com address, it gives me the standard unable to access that page message.

Verizon says they can't help me since everything on their end is fine and it's a problem with my computer.

Any idea why this is happening and how I can change it?

Thanks.

More about : reverse dns issue

August 31, 2004 8:16:42 AM

are you using a router, or direct connect with your PC?


What is the DNS server when you type ipconfig /all at a DOS prompt?

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jlanka (. .)
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August 31, 2004 5:28:22 PM

Direct connection to the PC.
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August 31, 2004 5:36:21 PM

and the answer to my 2nd question?

and what do you get when you type "nslookup" at a DOS prompt?

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jlanka (. .)
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August 31, 2004 5:45:16 PM

Sorry, didn't see the second question:

DNS Servers: 12.242.16.34
63.240.76.4
August 31, 2004 5:55:13 PM

ATTENTION: READ THIS ENTIRE POST, NOT JUST THE FIRST SENTENCE!

do you read the posts? There was a second question to my 2nd post.

I'll repeat it here:

what do you get when you type

nslookup

at a DOS prompt?

Can you then type in a node name (like www.yahoo.com) and resolve the address?



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jlanka (. .)
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August 31, 2004 6:26:11 PM

Properly chastised. I apologize.

When I type nslookup at the prompt:

DNS request timed out
timeout was 2 seconds
***Can't find server name for address 12.242.16.34: Timed out
DNS request times out
timeout was 2 seconds
***Can't find server name for addrss 63.240.76.4: Timed out
***Default servers are not available
Default Server: Unknown
Address: 12.242.16.34

Wasn't sure how to do the second part, but here's what I did.

At prompt, typed www.yahoo.com:

Server Unknown
Address 12.242.16.34

At the prompt typed, nslookup www.yahoo.com:

DNS request timed out
timeout was 2 seconds
DNS request timed out
timeout was 2 seconds
***Can't find address for server www.yahoo.com: Timed out

Thanks, Terri
August 31, 2004 8:31:51 PM

can you ping 12.242.16.34 and 63.240.76.4?

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jlanka (. .)
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September 1, 2004 4:46:25 PM

Sorry, work got in the way.

When I ping both of those address I receive:

Destination Host unreachable (repeated 4 times)

Ping Statistics:
Packets: Sent=4 Received=0 Lost=4 (100% Lost)

Pings fine with Comcast, just not Verizon
September 1, 2004 4:49:47 PM

OK, that last sentence just threw me for a loop.

Whats the involvement with the 2 ISP's?

Anyway, you can't ping your DNS servers so you're not going to be able to resolve names. But the reason you can't ping them is probably something to do with the 2 IPS's. Can you explain how you're using both?

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jlanka (. .)
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September 1, 2004 4:51:34 PM

hang on - I just read your original post. You're trying to SWITCH from Comcast to Verizon. I see.

Do you have a router that you've input static IP's for the DNS servers? In that case you'll have to change them to Verizon's DNS server IP's

If not, what is the setup?

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jlanka (. .)
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September 1, 2004 4:55:38 PM

jeeze, I'm not reading anything. You already told me you don't have a router - PC direct connect.

OK, you've got to go into:

Control Panel -> Network Connections -> Local Area Connection -> Properties -> TCP/IP -> Properties and change the DNS server IP's to Verizon's

If you don't know what they are you can either call them up and ask, or post here and when I get home I'll tell you what mine are (I have Verizon)

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jlanka (. .)
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September 1, 2004 4:58:09 PM

one more thing - theoretically you should be pulling the DNS IP's down when your PC does a DHCP renew but for some reason thats not working. So maybe just blanking out those fields might prime the pump to properly pull them down.

Make sure you try "obtain DNS automatically" if not already checked off

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jlanka (. .)
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September 1, 2004 5:42:51 PM

I'm trying to get connected with DSL. A Verizon tech came out and it worked fine on his computer.

When doing the testing you're asking me to do, I hook up my computer to the DSL cable only. Straight connection, no routers.

But when I'm replying here, I have to use the Comcast Cable connection as it's the only one that allows me internet connection at this point.

So I'm only using 1 ISP at a time. Comcast works. Verizon DSL doesn't and that's the one I'd like to get working.
September 1, 2004 6:01:54 PM

OK, did you read my 3 subsequent posts about the DNS settings in the Control Panel?

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jlanka (. .)
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September 2, 2004 8:53:35 PM

Thank you so much. It seems the problem was that it was is was using the DNS server addresses for Comcast. As soon as I checked "obtain automatically" everything started working again.

Again, thank you very much for your time and persistence.

Terri
September 3, 2004 1:11:30 AM

great, good to hear.

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jlanka (. .)
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!