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How are you connected to the Internet? And what device are you using? Any router? Modem? Ethernet or wireless? Which security software?
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How are you connected to the Internet? And what device are you using? Any router? Modem? Ethernet or wireless? Which security software?

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Run ipconfig /all from your computer and post results here
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Run ipconfig /all from your computer and post results here

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Gateway is defined!? Could be ICMP disabled?
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Gateway is defined!? Could be ICMP disabled?

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Are you able to ping from other machines to this? <br />
you may want to try netsh winsock reset, this may be helpful: <a href="http://www.google.ae/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=2&cad=rja&ved=0CDQQFjAB&url=http%3A%2F%2Fsupport.microsoft.com%2Fkb%2F299357&ei=J8xaUpGSLsjOsgaZ0oGwBw&usg=AFQjCNFib8aaasd0JU0bJhwxJTwOqrTDWw&sig2=68_x9cyOiv1TEYjplJtLTQ&bvm=bv.53899372,d.Yms" rel="ugc">http://www.google.ae/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=2&cad=rja&ved=0CDQQFjAB&url=http%3A%2F%2Fsupport.microsoft.com%2Fkb%2F299357&ei=J8xaUpGSLsjOsgaZ0oGwBw&usg=AFQjCNFib8aaasd0JU0bJhwxJTwOqrTDWw&sig2=68_x9cyOiv1TEYjplJtLTQ&bvm=bv.53899372,d.Yms</a>
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Are you able to ping from other machines to this?
you may want to try netsh winsock reset, this may be helpful: http://www.google.ae/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=2&cad=rja&ved=0CDQQFjAB&url=http%3A%2F%2Fsupport.microsoft.com%2Fkb%2F299357&ei=J8xaUpGSLsjOsgaZ0oGwBw&usg=AFQjCNFib8aaasd0JU0bJhwxJTwOqrTDWw&sig2=68_x9cyOiv1TEYjplJtLTQ&bvm=bv.53899372,d.Yms [http://www.google.ae/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=2&cad=rja&ved=0CDQQFjAB&url=http%3A%2F%2Fsupport.microsoft.com%2Fkb%2F299357&ei=J8xaUpGSLsjOsgaZ0oGwBw&usg=AFQjCNFib8aaasd0JU0bJhwxJTwOqrTDWw&sig2=68_x9cyOiv1TEYjplJtLTQ&bvm=bv.53899372,d.Yms]

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Broken hardware. &nbsp;New network card fixed it. Thanks very much everyone for your help.
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Broken hardware.  New network card fixed it. Thanks very much everyone for your help.

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Great. <b>You</b> found the cause and fixed it. <b>:-)</b>
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Great. You found the cause and fixed it. :-)

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Can ping my own IP address, but can't ping the default gateway or any external IP.<br />
Have tried netsh int ip reset, sfc /scannow. &nbsp;Still no response from anything.<br />
<br />
Any suggestions?
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Can ping my own IP address, but can't ping the default gateway or any external IP.
Have tried netsh int ip reset, sfc /scannow.  Still no response from anything.

Any suggestions?

Cannot ping any IP addresses

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Transmission Control Protocol/Internet Protocol (TCP/IP) is the set of networking protocols that define end-to-end connectivity specifying how data should be packeted, addressed, transmitted, routed and received at the destination. This functionality is organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved.