telnet 本地主机 1433 失败

Question

I issued this command on the command line:

telnet localhost 1433.

And I got this message:

Can not connect host, port 1433..

I tried telnet 127.0.0.1 1433 too.

I checked:

1. In SQL Server Configuration Manager > SQL Server Network Configuration > Protocols for MSSQLSERVER > TCP/IP > STATUS IS SET TO "USE"

2. Checked for firewall, and the firewall is off

3. Tried to see if the port for 1433 is opend : netstat -an | find"1433" netstat -an | find"1433" in the command line.

And the result is as below and I don't know what it means... Seems the port for 1433 is opened.

I need your help, please tell me why I can't connect SQL Server...

Answer 1

You need to open firewall for port 1433.

Go to Windows Firewall and add new inbound rule for port 1433.

Answer 2

I had the same issue. There were 2 sql servers hosting on my pc: MSSQLSERVER and SQLEXPRESS. Just set different ports for them.