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Unfortunately I am also having DNS issues

Last response: in Networking
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December 12, 2010 8:53:44 PM

Hello to all,

I have been having significant issues maintaining a consistant internet connection
for both my desktop and laptop for the past month. (I will provide detailed bullet point info so as to not take up too much of your time)

-Unable to load web pages but have no issues, IM'ing, video chatting, DL via Itunes or torrents (as long as a connection was already established)

-Laptop is connected by wireless and has the same issue as the desktop but I have absolutely no issues surfing via my Iphone4 (which I may need to use to check the board for questions/results)

-Sometimes when the page does load its unformatted (everything is in Times Roman Font and posted vertically...its like surfing during the mid 90's all over again!)

-When troublseshooting, I will get results that vary from "Windows did not find or could not identify the problem" to " DNS Server is not responding". (sometimes I will get conflicting messages from the laptop and desktop at the same time)

-I have unplugged ad re-plugged the modem by the network cable, Ehternet, cable and power supply, with no positive results

-I have also tried some of the solutions I've seen on this as well as other forums (changing dns addresses, flushing, pinging etc) but without success.


HARDWARE INFO:
DESKTOP: Gateway DX4300
OS: Windows 7 Home Premium

LAPTOP: Compaq CQ60
OS: Windows Vista Home Premium

Modem: Motorola Surfboard SBG901 (it is both a modem/wireless router so the laptop is not tethered in anyway)


I have contacted Comcast who do not find any issues (on their end). So I would like to start from the beginning: by asking for anyone's help to resolve this matter.

I am taking advantage of the usual five minute window to post this while my connection is up.

I don't know if any further info is needed at this point but will provide more as requested.

Thank you in advance to all who may try to assist me.

Mike

More about : dns issues

December 12, 2010 11:05:38 PM

do you have the same problem when you connect your modem directly to your PC?

you will have to reboot your modem after you connect the PC.
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December 13, 2010 9:31:04 AM

Thank you Emerald,
The modem is directly connected to my PC.

The laptop is grabbing the signal "over the air" (I believe that is the correct term) the same as my Iphone.

I have absolutely no issues surfing with my phone but the PC and laptop are having significant issues in maintaining the connection.

Mike
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Related resources
December 13, 2010 12:15:24 PM

Run a tracert to google. Post your results here.
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December 13, 2010 1:56:39 PM

Thank you Psycho Teddy,

Per your request, the following results:


C:\Users\MYKL>tracert google.com

Tracing route to google.com [72.14.204.103]
over a maximum of 30 hops:

1 38 ms 60 ms 17 ms c-76-124-8-1.hsd1.nj.comcast.net [76.124.8.1]
2 10 ms 15 ms 11 ms xe-10-3-0-0-sur01.jerseycity.nj.panjde.comcast.n
et [68.85.129.205]
3 14 ms 9 ms 9 ms xe-3-0-2-0-ar03.plainfield.nj.panjde.comcast.net
[68.85.62.17]
4 12 ms 11 ms 13 ms 68.85.62.165
5 312 ms 21 ms 12 ms 68.86.91.249
6 194 ms 135 ms 122 ms pos-0-1-0-0-pe01.111eighthave.ny.ibone.comcast.n
et [68.86.87.170]
7 158 ms 228 ms 244 ms as15169-3.111eighthave.ny.ibone.comcast.net [75.
149.230.194]
8 243 ms 251 ms 236 ms 209.85.255.68
9 220 ms 143 ms 122 ms 209.85.249.11
10 166 ms 117 ms 152 ms 66.249.94.54
11 206 ms 285 ms 249 ms iad04s01-in-f103.1e100.net [72.14.204.103]

Mike
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December 13, 2010 5:38:19 PM

As much as I hate to tell you this, it's definitely, 100% Comcast's issue. Your latency out to the local node is acceptable and only runs into issues when the traffic gets out into Comcast's network. 312ms is getting into ridiculous territory. Cable companies like to place the blame back on the user because they assume that the user doesn't know what they're doing and will simply accept their fate. You've got to be firm with them when they say that it's your problem. Insist that they come out and run a line test from your house to the node. After that's done, you'll have to fight with them some more to make them resolve the underlying problem: Too many people on a single node.
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December 13, 2010 6:03:09 PM

Thank you PsychoTeddy,

Now that you mention it, the problems seem to arise when a tech came out and installed my new modem after I called Comcast to say that I had no service.

The tech said something about something 'breaking off" on the pole (paraphrasing). After he left, I had no issues for two weeks then the issues, I described earlier.

I will contact Comcast again and stress that they resolve this issue.

Thanks for your help
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April 3, 2011 9:36:28 PM

hi myklnj

I have EXACTLY same issue as yours and i have the same SBG901 modem. Even one of my friends has the SBG901 and he also has same issue. So it couldbe n issue wth modem itself. I am thinking about changing it, so just wanted to know if you found any resolution meanwhile.

Thanks
Amt
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April 5, 2011 1:25:25 AM

Hold on a sec.

When you did a tracert, did you do it from the desktop or through wireless?

Because, correct me if I'm wrong, you have a wireless modem/router piggybacking off your modem which is connected to the internet.

Try connecting you desktop PC straight to Wireless Modem/Router.

Also, seeing as your having DNS issues, the Modem may be having issues handing down the DNS IP's and such to the Modem/Router

Also, Comcast could and most probably have bad DNS servers.

So, here is what I would do.

Set the Primary and Secondary DNS google's DNS

Primary: 8.8.8.8
Secondary: 8.8.4.4

You may not get a flawless DNS response time, but it should solve your problem.

Then, set your Wireless Modem/Routers DNS server to the IP address of your Modem.

Restart both, and connect all devices to the Wireless Modem/Router.

What you seem to be doing here is reporting two different WAN IP addresses to your ISP's DNS. That may be the issue, I'm not sure, but I'm just shooting.

Let me know how it all goes

Thanks
Axxeon
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April 5, 2011 1:29:58 AM

Woops, I just re-read over your description, and I seem to have misunderstood your setup, I was under the impression you had a Modem maintaining the conenction, and your Modem/router piggybacking off it.

Just try out setting your Primary and Secondary DNS to

Primary: 8.8.8.8
Secondary: 8.8.4.4

Sorry about that.

Thanks
Axxeon
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!