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SBS 2011 can't see internal network

Posted on 2014-04-17
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Last Modified: 2014-05-03
Hi, I have an SBS 2011 Server in a production environment that suddenly can't ping the workstations or gateway so therefore can't get on to the Internet. Was working fine till a power cut. I have checked and replaced network cables. The workstations can successfully ping the server. Have removed Kaspersky AV.

Help !
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Question by:PeterNairn
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by:Santosh Gupta
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Hi,

Run below commands,

Note: you will loss your LAN IP settings and you will be require to reboot the server.


netsh int ip reset
netsh winsock reset
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by:Tony Giangreco
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Run SFC /scannow

Chkdsk on each drive
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by:pgm554
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by:PeterNairn
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Hi, thanks for replays. I already ran the connect to internet wizard but it couldn't see the router. After disconnecting everything from the network and restarting the Server yesterday it could ping the router and get on to the Internet for about an hour and then stopped again. I shall run sfc and the the 2 netsh commands later this morning and let you know.

Thanks, Peter.
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by:tmoore1962
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Power cut did the router/firewall lose its settings.  Check that your DHCP and DNS is running the server, verify your network settings on the server.   Sounds like there is something else that is putting out dhcp so check services. check that the firewall did not get defaulted and is now putting out dhcp
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by:Jeffrey Kane - TechSoEasy
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The proper wizard to run in this case is the "Fix My Network" wizard.  Try that first and foremost.

Then, if you still are having issues, run the SBS Best Practices Analyzer which will run a battery of tests which should show any other problems along with steps on how to resolve them.  Get it here:  http://sbsbpa.com
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by:PeterNairn
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Hi, have run the Fix my Network but states it can't ping default gateway. Have run BPA but nothing in there that relates to the network.

Help !
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by:pgm554
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Try a different router.
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by:PeterNairn
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Tried another router already.
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by:pgm554
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Have you tried resetting the server static ip to a different one?
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by:Jeffrey Kane - TechSoEasy
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Can you please post a COMPLETE ipconfig /all from the server?

Thanks.
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by:PeterNairn
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Hi, I shall try setting to another ip address. Shall post ipconfig /all shortly. When I tried another router the server could ping it for about an hour then stopped, same when I reset the original router to factory defaults.
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by:Jeffrey Kane - TechSoEasy
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The fact that you are getting the "can't ping gateway" error means that you have misconfigured something in the NIC settings.  Posting the IPCONFIG /ALL will allow me to review those settings and tell you what's wrong.

Also, please confirm if this is SBS Standard or Essentials.
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PeterNairn earned 0 total points
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Hi, I re-installed a service pack and this seems to have fixed the problem. Can ping and can also run the Connect to Internet wizard. Seems that the power cut must have corrupted some files, very strange.

Thanks for all you suggestions,
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Author Closing Comment

by:PeterNairn
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This was a software / operating Issue.
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