Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Internet is down HELP!

Posted on 2011-04-20
13
Medium Priority
?
268 Views
Last Modified: 2012-05-11
Here is my problem if i plug my laptop in to the incoming wan connetion (manuel configured) i get internet so i know that the connection in is good. If i pluged labtop in to the lan connetion with the wan connection plugged in i still have internet.  so i know the router is working.

if i unplug my dns server the internet will start working on a mauneul configured computer. As soon as the dns server comes up again internet drops off. So i figured something with dns. so i got the ip address of google.com and tried it that way and it still would not come up.

I have check the dns settings and everthing seems to be working fine. its funny cuase everthing was working fine yeseterday and no changes where made.  

Just a note the dns server is also where we are hosting the exchange. (with works inside the domain but will not send anything out side of it).


any thing to point me the correct direction would be a great help.been working on it for 5 hours and no luck.  

thank you
0
Comment
Question by:jamyoung
  • 6
  • 5
  • 2
13 Comments
 
LVL 3

Expert Comment

by:perfectpc
ID: 35435713
Ok know it may be a stupid question but is the dns service running?

Do you forwarders setup. If so do they point to you isp and have they changed their dns servers
0
 
LVL 13

Expert Comment

by:jonahzona
ID: 35435730
A topology would help us get to the bottom of the problem more quickly. Do you have one you could post?
0
 

Author Comment

by:jamyoung
ID: 35435829
yes the dns server is running.
dns from the isp are fine.

is a star topology


there was one never created i took over this job not to long ago.

basically wan comes in to router then goes to switches.
dns is handle locally and so is dhcp.

0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 13

Expert Comment

by:jonahzona
ID: 35435876
Before you go any further, check your system events in your DNS server to see if anything has occurred since yesterday.

Next I would say to do a ordered-power cycle. Turn off modem (if you are on cable) and router. Power up modem first, power up router modem is all the way on. Then power on switch and DNS.

If you have already done this, then ignore it. But it is the first place I always start.
0
 

Author Comment

by:jamyoung
ID: 35436086
Yeah i have done this already
0
 
LVL 13

Assisted Solution

by:jonahzona
jonahzona earned 2000 total points
ID: 35436092
Alright, moving forward.

If you can RDP or log on locally to the DNS server, can you ping your gateway? Can you ping external domains?
0
 
LVL 3

Expert Comment

by:perfectpc
ID: 35436099
Are we talking a windows server here. If so do have any errors in the event log?

If a windows server it could be worth removing dns and reinstalling and I have seen this resolve errors before.
0
 
LVL 13

Expert Comment

by:jonahzona
ID: 35436110
Here is a screenshot from our Terminal Server.

From looking at your screenshots, is your domain called HOME? I was just assuming that all of your users are created through an Active Directory domain.

 TS Config TS Config
0
 
LVL 13

Expert Comment

by:jonahzona
ID: 35436117
WRONG POST! Sorry guys. Too many EE windows open. DELETE.
0
 

Author Comment

by:jamyoung
ID: 35437774
There are no errors in the event log . i am going to uninstall dns and will let you know how that goes
0
 

Author Comment

by:jamyoung
ID: 35437951
Ok i took off the dns and reinstalled it now ever pc and all other servers have internet but now i have no exchange servers. the dns server is also the exchange box. Also not able to ping it from any other pc.
0
 

Accepted Solution

by:
jamyoung earned 0 total points
ID: 35448047
FYI server got hit with a massive internet attack. I pulled it down and resintalled the server.  

Thanks for all your help.
0
 

Author Closing Comment

by:jamyoung
ID: 35473517
See above
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This program is used to assist in finding and resolving common problems with wireless connections.
If you try to migrate from Elastix to Issabel, you will face a lot of issues. These problems are inevitable but fortunately, you can fix them. In the guide below, I will explain how I performed the migration while keeping all data and successfully t…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

564 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question