The C/S version is well applied in the LAN. If a foreign user wants to apply the application by dialing, the client will never be connected to the SQL server and the prompt "cannot establish a connection" is displayed ".

You can use an IP address for connection!
1. Ping is guaranteed first.
2. No error will be reported when Telnet IP 1433 is written in DOS
3. Use an IP address to connect to the Enterprise Manager:
Enterprise Manager --> right-click sqlserver group --> Create sqlserver registration --> next --> Write Remote Instance name (IP address, machine name) --> next --> select sqlserver login --> next --> write login name and password (SA, pass) --> next --> complete
4. If not:
Sqlserver server --> Start Menu --> sqlserver --> server network utility --> enable Winsock Proxy --> proxy address: (sqlserver Server IP address) --> proxy port --> 1433 --> OK
5. If not:
Sqlserver server --> Start Menu --> sqlserver --> client network utility --> alias --> Add --> write alias such as "" --> "network library" select TCP/IP --> The server name is written to the remote IP address or Instance name --> OK