Databases Sql Server How to connect to a remote sql server in a WAN enviroment

When you need to connect to a remote sql server, you could register a remote server in your sql anterprise manager. On the console root, expand the Microsoft SQL Server, right click "SQL Server Group", select "Create New SQL Server Register", then on the prompt dialog click "next", input your remote server ip in the available server text box, then add it to the right servers list. Click "next" button to continue, select one way of identify to log on the SQL Server. Click "next", input the user name and password. Then "next"->"next"->"Complete".

Ok, now you have complete the register of the remote server on your computer. If the connection is correct, everything could be ok, your could start to visit the remote sql server now. While sometimes you will get an error of "sql server does not exist or access denied".

To solve this problem, you could take the following steps to check the reason for.
  1. First, to ensure a ping command comes correct. If not, that mean your network has problems. You could contact to your network administrator to help to solve it.
  2. In windows command prompt, test this commmand: telnet sql-server ip address 1433. Well, after run this command, if you get any error message shows on the screen, still mean that your network has problems. Check if the server has a firewall or disable the 1433 port.
  3. If it does not work, then on the server computer, find the Microsoft SQL Server menu group, run "Server Network Utility". Enable the WinSock Proxy option, in "Proxy Address" option, input the server's ip and the Proxy Port, write 1433.
  4. If it still not work, on the client computer, find the "Microsoft SQL Server" menu group, run "Client Network Utility", click the "alias" tab and add an alias to the server(any name you want), then activate the TCP/IP option in the radio group of "network library". In Connection Parameters, enter the remote server's ip address. If you want to specify a port to the connection, deselect the "Dynamic decision to port" option and enter the port you want.
  5. If your Microsoft SQL Server has not patched, best to update it. To check your SQL Server's version, run the Sql Query Analyzer, run this command "select @@version". If the version is under 8.00.760 indicates that you have not patch the sql sp3.
To get the needed patchs, check the the url below:
All patchs:
Select the correct patch according to the version of SQL Server you install, here is mine:

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Database - Sql Server