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How can I correct this issue: I have full connectivity on my domain but can't connect to the Internet?

Posted on 2008-06-25
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Last Modified: 2012-05-05
Here's what I've got.  Sony laptop worked fine until about a week ago, but I'm thinking this is a server issue.  I can connect to the internet both wired and wireless so long as I connect to a neighbors wireless signal or my work domain.  All PC's on my home domain work fine, just not the laptop. It's as if my server will no longer permit my laptop to surf.  I can ping out to the internet and resolve DNS, just no surf!  Any ideas?
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Question by:mrh626
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by:Christopher Martinez
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Click on start, goto run
type in CMD and hit enter
in the promp type in  ipconfig /release
after it does its thing, type in ipconfig /renew
after it does its thing, type in ipconfig /flushdns
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by:mrh626
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No luck.  No change.
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by:ChiefIT
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This is probably a prefered DNS server and/or default gateway for your laptop. If you  had policies to prevent you from accessing the interent, your policies would be involked at work.

At the command prompt type IPconfig /all and see what the prefered DNS server is. If it is your work server, you may wish to create a second LAN connection on that NIC card and use that one for home.

Since you don't want to interfere with work and constanty battle between the two connections, creating a second LAN connection for that NIC is the best alternative. Tell this LAN connection to request an IP and DNS automatically.
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by:mrh626
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Preferred DNS is my home server IP.  My laptop is "joined" to my home network domain and has never been "joined" to my work domain.
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by:ChiefIT
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So, you have a domain server that provides DNS at home?
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by:ChiefIT
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Change your default gateway to match the others on your home domain. You can do this in the TCP/IP configuration of your NIC card. Let me know if this isn't the correct answer and we will troubleshoot more.
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by:mrh626
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All computers are configured for DHCP.  IP's are issued from Win2K3 server and not DHCP server from router.
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by:ChiefIT
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So you DHCP server should be supplying the default gateway and prefered DNS servers to the Home based clients. Go into the MMC snapin for the DHCP server. Expand the DHCP server and there will be a folder called options. Open the options folder and manually configure your default gateway, (your router's IP), to the router option. Then, go to the troubled client and type, at the command prompt and type>
IPconfig /release
IPconfig /renew

Now you should be provided the gateway address for your system and be able to communicate with outside sites.
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by:din101
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make sure the laptop dont  have any proxy server setting set on the browser . and try removing and rejoining again.  
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by:mrh626
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I already went in and verified DHCP settings on the server.  I even removed the laptop from the list of "Address Leases" AND from the DNS domain folder and then renewed my IP.  Same thing, no surf.
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mrh626 earned 0 total points
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Okay.  Don't ask me why I thought to do this, and I have no clue why this worked... I've been doing networking for nearly 10 years and have never seen anything like this.  I decided to upgrade my router in the middle of all this and to surprise the laptop worked!  

So the issue was apparently with my router all along.  Still doesn't make sense, though?!  Every other PC on the network had no issues.  A few days ago, I upgraded the firmware on my original router hoping that might fix the problem, but it didn't.

Anyway, problem solved.  If anyone wants to speculate about the router, I'm still curious.

Thanks for all the input.
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by:ChiefIT
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That makes no sense!

Why would that effect one machine and not the others? HMM, something is amiss.
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by:mrh626
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I don't understand it either.  The router is about 7 years old and we've had a few lightning storms and power losses recently.  I have no other explanations or theories beyond these.  The network functions just as it should now that I replaced the router.  Go figure.

Thanks to all who have contributed to trying to solve this issue.  I'll consider this matter closed.
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by:ChiefIT
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You can accept your answer as the solution.
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