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DNS Problems at work...


49 posts in this topic

Posted

From the screenshot it looks like the router does not respond to PING, but this is not necessary, and Windows detects Internet connectivity. Try pinging 8.8.8.8 for example or just try going to a website (make sure Proxy set to none) and see if it works.

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Posted

Windows seems to think you have Internet over IPv4...

Umm, proxy setting maybe?

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Posted

Days inn? And this hotel does not run a captive portal?

Every hotel I have ever used wifi at had a captive portal setup, you could not access external dns until you had authed by it redirecting any of your http traffic to the captive portal page.

So you manage this hotel network? You mention other devices working? And no guests with problems - so your laptop is just not working?

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Posted

Days inn? And this hotel does not run a captive portal?

Every hotel I have ever used wifi at had a captive portal setup, you could not access external dns until you had authed by it redirecting any of your http traffic to the captive portal page.

So you manage this hotel network? You mention other devices working? And no guests with problems - so your laptop is just not working?

Well the hotel is independently owned so he has to provide the network. I am not in charge of the network I was just tasked to get it fixed today and I got the static ips from TWC and assigned them in the router like they were supposed to be. The network is Ubee DDW3361 (Modem) Cisco E2500 (Router) Old D-Link (Switch) my boss will not allow me to look at the settings in the modem but I got in to the router by working with tech support because he had me reset it because everything on the modem side was working fine.

The only problem I am running in to is my laptop not working, I have tried 3 wifi adapters and ethernet and they all will not gain internet access. My Evo 3D and Touchpad work on the network no problems at all. I did wifi tether with my phone today and it worked as well and I have no issues at home so I am at a loss as to why I cannot come to terms with the damn Cisco router...

PS: The laptop does connect and allow me to surf for maybe 30 seconds then starts with the DNS errors again. I have tried IE, Firefox and Chrome all with the same result.

Is there a portal that can be run from this setup? I can propose the idea to him and see what he says and maybe he will let me do it.

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Posted

Just for ****s and giggles, disable IPv6 on your laptop and see if that makes a difference.

By way of a quick glance, it occurs to me that your laptop might be trying to access the outside world through an IPv6 connection, and one of the routers inbetween may not support it.

Also, the magic sauce: If you run a command in CMD, use > to port the output to a text file.

For example: tracert 192.168.0.1 > C:\Output.txt

Then you can just copy paste the text from output.txt instead of needing to stuff about :)

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Posted

Just for ****s and giggles, disable IPv6 on your laptop and see if that makes a difference.

By way of a quick glance, it occurs to me that your laptop might be trying to access the outside world through an IPv6 connection, and one of the routers inbetween may not support it.

Also, the magic sauce: If you run a command in CMD, use > to port the output to a text file.

For example: tracert 192.168.0.1 > C:\Output.txt

Then you can just copy paste the text from output.txt instead of needing to stuff about :)

Thanks, I will give that a shot when I return to work on Tuesday. Somethings got to give lol.

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Posted

Keep beating at it and hope your skull lasts longer than the wall :p

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Posted

Keep beating at it and hope your skull lasts longer than the wall :p

Hell or high water I will figure this out :-D

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Posted

OK I can see the problem from your screenshots now. I missed it the first time.

You are using 8.8.8.8 & 8.8.4.4 for your DNS while the router is handing out 24.25.5.60 & 24.25.5.61. All the other clients work so it must be yours. Obviously Google Public DNS is being blocked for some reason, just set your DNS settings back to DHCP and you should be golden.

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Posted

Windows seems to think you have Internet over IPv4...

Umm, proxy setting maybe?

That makes no sense Internet is essentially IPV4 haha...

It makes me worried that you cannot look at the other devices like your boss says. Who knows what they are? They might have firewall and only allow DNS out to certain DNS Servers for example. Can you drew out your network. Sounds like Static routes are screwed between the 4 buildings is it?

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Posted

OK I can see the problem from your screenshots now. I missed it the first time.

You are using 8.8.8.8 & 8.8.4.4 for your DNS while the router is handing out 24.25.5.60 & 24.25.5.61. All the other clients work so it must be yours. Obviously Google Public DNS is being blocked for some reason, just set your DNS settings back to DHCP and you should be golden.

I tried the google and auto still same result. I will post tomorrow when I return to work as today was my day off. Hopefully we can figure this out.

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Posted

Well I am back at work and I am surfing! But only in safe mode... I am on a fresh install of Windows 7 Ultimate with all of my drivers updated on my internal and 2 usb wifi adapters but I still cannot surf in Windows normally. I am at a total loss as to why it works in Safe Mode and not normal. There is nothing installed on my system except for MSE, Chrome, and Firefox and I cannot ping, tracert or surf from Windows. Does anyone else have any ideas? Make absolutely no sense I cannot surf at work (except for safe mode) but have no problems anywhere else be it at home, friends or a hot spot.

I really hope someone notices something I am missing because I just want to take this thing and smash it into a wall and rip all the networking equipment out and run it over....

298550827.png

747047373.png

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Posted

So you don't have any 3rd party firewalls installed that might not be running in safemode?

And you say it works on other networks in normal mode? right?

So is your network set as public or home/work/private in which mode - would think that maybe you using different firewall options when in safe vs normal?

Can you please post output of ipconfig /all in safe, and show it pinging your gateway. Then in normal mode show ipconfig /all and pinging the gateway.

Your only working with wireless right? Does it work with a wire? Can you plug it in somewhere - and you get the same symptoms, works with safemode, not in normal?

edit: so thats it working in safe mode.. Also you say this is a clean install, with nothing installed but chrome, mse and firefox - that is the only software you installed. No other antivirus software or firewalls?

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Posted

So you don't have any 3rd party firewalls installed that might not be running in safemode?

And you say it works on other networks in normal mode? right?

So is your network set as public or home/work/private in which mode - would think that maybe you using different firewall options when in safe vs normal?

Can you please post output of ipconfig /all in safe, and show it pinging your gateway. Then in normal mode show ipconfig /all and pinging the gateway.

Your only working with wireless right? Does it work with a wire? Can you plug it in somewhere - and you get the same symptoms, works with safemode, not in normal?

edit: so thats it working in safe mode.. Also you say this is a clean install, with nothing installed but chrome, mse and firefox - that is the only software you installed. No other antivirus software or firewalls?

Yea nothing else is installed. No firewalls or any kind and I set it to a public network when I first connected. The ipconfig all in normal mode shows the exact same thing, the only difference is that I cannot ping anything it just shows request timed out.

And yes only wireless, I have no way of trying Ethernet as I am on crutches and the the router is up on shelf.

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Posted

Here is my normal mode screenshot... It's working at the present moment but who knows for how long :s

673795854.png

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Posted

Here is a ping and ipconfig /all while the wireless showed no internet access.


Microsoft Windows [Version 6.1.7601]

Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\Kyle>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : NoLiMiT06-PC

   Primary Dns Suffix  . . . . . . . :

   Node Type . . . . . . . . . . . . : Hybrid

   IP Routing Enabled. . . . . . . . : No

   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Atheros AR5007 802.11b/g WiFi Adapter

   Physical Address. . . . . . . . . : 00-24-2B-91-1B-2A

   DHCP Enabled. . . . . . . . . . . : Yes

   Autoconfiguration Enabled . . . . : Yes

   IPv4 Address. . . . . . . . . . . : 192.168.1.12(Preferred)

   Subnet Mask . . . . . . . . . . . : 255.255.255.0

   Lease Obtained. . . . . . . . . . : Tuesday, July 17, 2012 7:57:38 PM

   Lease Expires . . . . . . . . . . : Wednesday, July 18, 2012 8:51:56 PM

   Default Gateway . . . . . . . . . : 192.168.1.1

   DHCP Server . . . . . . . . . . . : 192.168.1.1

   DNS Servers . . . . . . . . . . . : 24.25.5.60

									   24.25.5.61

									   192.168.1.1

   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Realtek RTL8102E/RTL8103E Family PCI-E Fa

st Ethernet NIC (NDIS 6.20)

   Physical Address. . . . . . . . . : 00-1F-16-6B-7D-F7

   DHCP Enabled. . . . . . . . . . . : Yes

   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{E36D668A-281F-4C50-9CD6-387189902020}:

   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Microsoft ISATAP Adapter

   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

   DHCP Enabled. . . . . . . . . . . : No

   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface

   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

   DHCP Enabled. . . . . . . . . . . : No

   Autoconfiguration Enabled . . . . : Yes

C:\Users\Kyle>


Microsoft Windows [Version 6.1.7601]

Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\Kyle>ping www.google.com

Ping request could not find host www.google.com. Please check the name and try a

gain.

C:\Users\Kyle>ping 192.168.1.1

Pinging 192.168.1.1 with 32 bytes of data:

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Ping statistics for 192.168.1.1:

    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Users\Kyle>

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Posted

So your saying it works for a while or sometimes, and then stops working? So how do you know that this was just not the case with your safe mode?

So the symptoms are that it sometimes work, not that it works 100% of the time all the time in safe mode. And doesn't work in normal mode at all.

So see you unchecked ipv6, I don't think that is your problem at all - but if you run this command it will make your ipconfigs /all a lot easier to read.. Since it will remove the teredo and isatap interfaces, etc.

from elevated prompt run

reg add hklm\system\currentcontrolset\services\tcpip6\parameters /v DisabledComponents /t REG_DWORD /d 255

reboot, to put it back the way it was just run this command and reboot again

reg delete hklm\system\currentcontrolset\services\tcpip6\parameters\ /v DisabledComponents /f

Your ipconfig /all will be much cleaner then ;)


C:\Windows\System32>ipconfig /all


Windows IP Configuration


   Host Name . . . . . . . . . . . . : i5-w7

   Primary Dns Suffix  . . . . . . . : local.lan

   Node Type . . . . . . . . . . . . : Broadcast

   IP Routing Enabled. . . . . . . . : No

   WINS Proxy Enabled. . . . . . . . : No

   DNS Suffix Search List. . . . . . : local.lan


Ethernet adapter Local Area Connection:


   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : TAP-Win32 Adapter V9

   Physical Address. . . . . . . . . : 00-FF-22-48-19-80

   DHCP Enabled. . . . . . . . . . . : Yes

   Autoconfiguration Enabled . . . . : Yes


Ethernet adapter Local:


   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet

   Physical Address. . . . . . . . . : 18-03-73-B1-0D-D3

   DHCP Enabled. . . . . . . . . . . : No

   Autoconfiguration Enabled . . . . : Yes

   IPv6 Address. . . . . . . . . . . : 2001:470:snipped:snipped::666(Preferred)

   Link-local IPv6 Address . . . . . : fe80::e0cd:efb8:f50:7e7b%13(Preferred)

   IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred)

   Subnet Mask . . . . . . . . . . . : 255.255.255.0

   Default Gateway . . . . . . . . . : 2001:470:snipped:snipped::1

                                       192.168.1.253

   DNS Servers . . . . . . . . . . . : 192.168.1.253

   NetBIOS over Tcpip. . . . . . . . : Enabled


C:\Windows\System32>

I even use IPv6, and see how much cleaner that is ;) I removed the teredo and other interfaces since I was not using them, but if your not going to use IPv6 at all the above command does it all in one easy to do command. Ok so when this is not working and you can not ping your gateway.. Can you take a look at your arp cache, arp -a will show you the mac of your gateway. I would check it when its working, and then again check it when its not. What do you show for the mac of your gateway? If you don't have one - it would never ever work. Also - what are you using for wireless security, if anything? if hotel I would think your just wide open or do you setup say wpa and give the users the psk? here is example arp -a command showing the macs - see my gateway there at 192.168.1.253

Interface: 192.168.1.100 --- 0xd

  Internet Address      Physical Address      Type

  192.168.1.8           00-0c-29-44-07-e6     dynamic

  192.168.1.40          2c-76-8a-ad-f6-56     dynamic

  192.168.1.99          00-06-dc-43-ad-78     dynamic

  192.168.1.253         00-50-56-00-00-02     dynamic

  192.168.1.255         ff-ff-ff-ff-ff-ff     static

  255.255.255.255       ff-ff-ff-ff-ff-ff     static

yeah I know 00-50-56-00-00-02 is a bit strange looking, but I set it to that on purpose - my gateway is a VM running on esxi, and set the wan and lan interfaces to something easy for me to know which one is which, etc.. ;)

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Posted

The network is open, I thought maybe my Mac address was blocked in the modem so in tried spoofing it and still no go... I am at a loss on this and really feel like giving up as nothing is making a damn bit of sense and this really sucks because I might be starting school again and need internet for my classes and tethering 3g at work is a no go as my signal sucks inside unless someone knows how to use a android devices wifi connection with a pc :-P

edit: here is the arp cache budman http://db.tt/fm6U7dg5. (Sorry for the links, I'm using my phone for all this...)

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Posted

The network is open, I thought maybe my Mac address was blocked in the modem so in tried spoofing it and still no go... I am at a loss on this and really feel like giving up as nothing is making a damn bit of sense and this really sucks because I might be starting school again and need internet for my classes and tethering 3g at work is a no go as my signal sucks inside unless someone knows how to use a android devices wifi connection with a pc :-P

I can't remember if this was already mentioned, but can DD-WRT be installed to that router ?

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Posted

I can't remember if this was already mentioned, but can DD-WRT be installed to that router ?

I think it can but my boss would go ape **** if I did that... I added my arp cache results in the post above btw...

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Posted

So that posting of your arp cache is after it wasn't working, and it was the same when it was working.

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Posted

So that posting of your arp cache is after it wasn't working, and it was the same when it was working.

Yup

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Posted

I think it can but my boss would go ape **** if I did that

:laugh: Would he know ? If you are burdened with the task of fixing it, does he know enough about them to know you changed the firmware ?

I would at least mention it to him as a possible fix, with the understanding it could be flashed back to stock if it didn't work :)

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Posted

:laugh: Would he know ? If you are burdened with the task of fixing it, does he know enough about them to know you changed the firmware ?

I would at least mention it to him as a possible fix, with the understanding it could be flashed back to stock if it didn't work :)

I really wish it were that simple... The guy he has manage his network had to call me because he didn't know how to surf into the modem... To me that is pretty much common knowledge. The thing I am worried about is getting caught because he told me he doesn't trust me with it but I have about 4-5 years of networking experience and have never had any problems getting a network up and running mind you I've never done a huge network for a office lol (starting school in the fall hopefully) I guess I am stuck with my tablet and phone for now.

Oh does anyone know if there is a way to share my phone or tablets wifi connection with my laptop? Both run Android.

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