Welcome guest. Before posting on our computer help forum, you must register. Click here it's easy and free.

Author Topic: DC DNS Errors and blocks internet traffic  (Read 24097 times)

0 Members and 1 Guest are viewing this topic.

Rob Pomeroy



    Prodigy

  • Systems Architect
  • Thanked: 124
    • Me
  • Experience: Expert
  • OS: Other
Re: DC DNS Errors and blocks internet traffic
« Reply #15 on: June 26, 2009, 12:21:11 PM »
Well I have one more assumption, which is this: your client computers are only getting the DC's IP address for DNS queries.  So the DC is operating as a caching proxy.  And when the DC gets requests for external sites, it doesn't know what to do with them.  So: leave DHCP alone, but in the DNS settings for the DC, make the first entry the IP address of your router.  That well the DC will authoritatively answer queries in relation to computers within AD and pass on everything else.  Try it.
Only able to visit the forums sporadically, sorry.

Geek & Dummy - honest news, reviews and howtos

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #16 on: June 26, 2009, 12:33:12 PM »
OK so change the DNS setting on the DC from:

.10 (Itself)
.11 (Non-existing DC) LOL

To:

.1 (The router, to provide routing for external request)
.10 (To itself for DNS request as well)

Am I understanding correctly? Becuase it does sound the probable solution.
Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!

jerryheavyarms



    Apprentice

  • http://www.youtube.com/theoldpath
  • Thanked: 13
    • Bible insights by THE MOST SENSIBLE PREACHER OF OUR TIME.
  • Experience: Beginner
  • OS: Linux variant
Re: DC DNS Errors and blocks internet traffic
« Reply #17 on: June 26, 2009, 12:35:18 PM »
And the alternative DNS server could be your Internet provider.

You could also use <a href="http://www.opendns.com/solutions/overview/>openDNS[/url]
"Most complex problems do have a solution. It is only that we don't attempt to think. So let's apply: Dont just do something, sit there."
--Kuya Daniel Razon

Everything in this world will remind us of God, even every drop of a leaf from its stem will remind us of His glory. -Bro.Eli Soriano

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #18 on: June 26, 2009, 12:48:09 PM »
OK, so I have made plans to be here tomorrow night to implement these changes. Also I am now very intrigue by OpenDNS and will be looking into that closer.

I will update on my status either Monday or Tuesday.

Thanks
Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!

jerryheavyarms



    Apprentice

  • http://www.youtube.com/theoldpath
  • Thanked: 13
    • Bible insights by THE MOST SENSIBLE PREACHER OF OUR TIME.
  • Experience: Beginner
  • OS: Linux variant
Re: DC DNS Errors and blocks internet traffic
« Reply #19 on: June 26, 2009, 12:51:55 PM »
Yes, please update us. ;D
Good luck! 8)
"Most complex problems do have a solution. It is only that we don't attempt to think. So let's apply: Dont just do something, sit there."
--Kuya Daniel Razon

Everything in this world will remind us of God, even every drop of a leaf from its stem will remind us of His glory. -Bro.Eli Soriano

Rob Pomeroy



    Prodigy

  • Systems Architect
  • Thanked: 124
    • Me
  • Experience: Expert
  • OS: Other
Re: DC DNS Errors and blocks internet traffic
« Reply #20 on: June 26, 2009, 02:25:54 PM »
Good call Jerry.  My preference would be (from the DC) to query the router rather than the ISP, for various reasons (local caching, lower maintenance) but the OpenDNS project is always worth a look.

And yes Chris, I would do the change you suggested.  If you wish to implement OpenDNS, I would do it at the router, not at the DC.  DNS is very noisy traffic with latency issues and it's best to keep as much of it local as possible.
Only able to visit the forums sporadically, sorry.

Geek & Dummy - honest news, reviews and howtos

jerryheavyarms



    Apprentice

  • http://www.youtube.com/theoldpath
  • Thanked: 13
    • Bible insights by THE MOST SENSIBLE PREACHER OF OUR TIME.
  • Experience: Beginner
  • OS: Linux variant
Re: DC DNS Errors and blocks internet traffic
« Reply #21 on: June 26, 2009, 02:56:10 PM »
I think you're right Rob. Just as what Chris stated that he has only one network connection
"Most complex problems do have a solution. It is only that we don't attempt to think. So let's apply: Dont just do something, sit there."
--Kuya Daniel Razon

Everything in this world will remind us of God, even every drop of a leaf from its stem will remind us of His glory. -Bro.Eli Soriano

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #22 on: June 30, 2009, 03:18:13 PM »
I set it to:
.10.1 (Router)
.10.10 (Self)

It appeared to be working this way and then about 15 minutes ago it happened again, the internet went completely down. So I set it to opbtain its own info and then reentered the IP info and that brought the internet back up.

 ???
Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!

Rob Pomeroy



    Prodigy

  • Systems Architect
  • Thanked: 124
    • Me
  • Experience: Expert
  • OS: Other
Re: DC DNS Errors and blocks internet traffic
« Reply #23 on: June 30, 2009, 05:48:38 PM »
Right, so you're now (potentially) entering the realms of flaky network cards or faulty software or something of that ilk.  For further diagnoistics, when the internet appears to be down, from a client machine in a command prompt run the command "nslookup www.google.com".  What happens?  Repeat from the DC.

What network switch do you have between the DC and the other PCs/devices?  What speeds/duplex are the cards running at?
Only able to visit the forums sporadically, sorry.

Geek & Dummy - honest news, reviews and howtos

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #24 on: July 01, 2009, 09:48:43 AM »
I will pull one next time the internet goes down as well.
Code: [Select]
C:\Documents and Settings\cwilcox>nslookup www.google.com
Server:  dc01.ptc.local
Address:  192.168.10.10

Non-authoritative answer:
Name:    www.l.google.com
Addresses:  74.125.47.105, 74.125.47.103, 74.125.47.106, 74.125.47.104
          74.125.47.99, 74.125.47.147
Aliases:  www.google.com
As for the switches the DC connects to an AOpen 10/100 and I also have an Airlink 10/100/1000 on the system as well. Both 24 port.

Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!

jerryheavyarms



    Apprentice

  • http://www.youtube.com/theoldpath
  • Thanked: 13
    • Bible insights by THE MOST SENSIBLE PREACHER OF OUR TIME.
  • Experience: Beginner
  • OS: Linux variant
Re: DC DNS Errors and blocks internet traffic
« Reply #25 on: July 01, 2009, 10:51:46 AM »
Have you tried setting your ISP's address to be an alternate DNS server?
"Most complex problems do have a solution. It is only that we don't attempt to think. So let's apply: Dont just do something, sit there."
--Kuya Daniel Razon

Everything in this world will remind us of God, even every drop of a leaf from its stem will remind us of His glory. -Bro.Eli Soriano

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #26 on: July 01, 2009, 11:51:05 AM »
I have not tried that yet. I will try that this weekend or next time it goes down. I went out and got a network card and some memory for the DC, so I am going to try and get all that in this weekend.
Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #27 on: July 03, 2009, 06:28:46 AM »
So it went back down again. I implemented my ISPs IP and that did nothing. I tried promoting another DC that I made a few days ago and it couldnt bring back the internet either. So this time I tried something a little out of the norm for me. I turned off all the lights and went home! Came back up this morning and the &*^% fixed itself. So I am going to get the memory and the network card installed this weekend and see if that helps. If you guys have anymore thoughts I am still listening and still very thankful for all. This stupid internet is driving me crazy.
Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!

Rob Pomeroy



    Prodigy

  • Systems Architect
  • Thanked: 124
    • Me
  • Experience: Expert
  • OS: Other
Re: DC DNS Errors and blocks internet traffic
« Reply #28 on: July 07, 2009, 06:59:02 AM »
Yeah, figures...

Just one thing - I think I got things in the wrong order before.  The DC should query itself first for DNS, since it is authoritative for all local matters.  Instead of:

I set it to:
.10.1 (Router)
.10.10 (Self)

The order should be:

DNS1: x.x.10.10
DNS2: x.x.10.1

Sorry for the confusion!
Only able to visit the forums sporadically, sorry.

Geek & Dummy - honest news, reviews and howtos

Chrisxs5

    Topic Starter


    Hopeful
  • Sup!?
  • Thanked: 8
    • Where we learn IT daily!
  • Certifications: List
  • Computer: Specs
  • Experience: Expert
  • OS: Windows 8
Re: DC DNS Errors and blocks internet traffic
« Reply #29 on: July 07, 2009, 07:09:15 AM »
OK, I will fix that immediately. It went down this morning again. I also have the memory and a new network card to throw on it. I alsow changed out the patch cable and moved it to my other switch.
Check out my blog: http://vitrookie.com

System, Network, Virtualization, Storage, ETC Admin with a bunch of certs and an ego trip!