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SBS 2011 can't see internal network

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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PeterNairn
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PeterNairn
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1 Solution
 
Santosh GuptaCommented:
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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Tony GiangrecoCommented:
Run SFC /scannow

Chkdsk on each drive
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PeterNairnAuthor Commented:
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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tmoore1962Commented:
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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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
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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PeterNairnAuthor Commented:
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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pgm554Commented:
Try a different router.
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PeterNairnAuthor Commented:
Tried another router already.
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pgm554Commented:
Have you tried resetting the server static ip to a different one?
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Can you please post a COMPLETE ipconfig /all from the server?

Thanks.
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PeterNairnAuthor Commented:
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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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
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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PeterNairnAuthor Commented:
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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PeterNairnAuthor Commented:
This was a software / operating Issue.
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