- Probably port 1433 is disabled, so enable it using MS WIndows firewall.
or just use
netsh firewall set portopening protocol = TCP port = 1433 name = SQLPort mode = ENABLE scope = SUBNET profile = CURRENT
- Probably MS SQL Server Browser Service is not running. So go to Services and start it.
or just execute under Run menu
%windir%\system32\services.msc
- Probably TCP/IP channel is disabled under SQL Server 2008/2014 Configuration Manager. SO go there and enable all TCP/IP options.
- Just in case at the same place (SQL Server 2008/2014 Configuration Manager) make sure you have 1433 port.
- Make sure that SQL server is configured to allow remote connections. Use MS SQL Management Studio and right click on the top node which server itself.