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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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Expert Comment

by:Santosh Gupta
ID: 40007988
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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Expert Comment

by:Tony Giangreco
ID: 40008000
Run SFC /scannow

Chkdsk on each drive
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Expert Comment

by:pgm554
ID: 40008081
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Author Comment

by:PeterNairn
ID: 40008311
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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Expert Comment

by:tmoore1962
ID: 40009151
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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Expert Comment

by:Jeffrey Kane - TechSoEasy
ID: 40011065
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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Author Comment

by:PeterNairn
ID: 40015454
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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Expert Comment

by:pgm554
ID: 40015472
Try a different router.
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Author Comment

by:PeterNairn
ID: 40015482
Tried another router already.
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Expert Comment

by:pgm554
ID: 40015577
Have you tried resetting the server static ip to a different one?
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Expert Comment

by:Jeffrey Kane - TechSoEasy
ID: 40019282
Can you please post a COMPLETE ipconfig /all from the server?

Thanks.
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Author Comment

by:PeterNairn
ID: 40019292
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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Expert Comment

by:Jeffrey Kane - TechSoEasy
ID: 40027492
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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Accepted Solution

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PeterNairn earned 0 total points
ID: 40027500
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
ID: 40039032
This was a software / operating Issue.
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