>Hi,
>
>I need to check if a client computer has port 1433 open. This client (unlike other client PCs) has a problem connecting to the SQL Server. When I Google for "how to find if port 1433 is open" I come across messages pointing to the TELNET command. I tried telnet on my computer (in Command prompt) but get the message that this command "is not recognized ...". Is there another command that will quickly tell me (on that client PC) if port 1433 is open or not?
>
>TIA

Take a look at the Netstat command, open a command window (some options of netstat will require admin rights, but not all)

To filter the output and list only entries with 1433 you can do something like

netstat | find "1433"