Rather than connecting with server\instance, you cannot with server,14430, that is specifying the port explicitly. You can connect to and interact with an Aurora PostgreSQL DB cluster that supports Babelfish by using the SQL Server sqlcmd command line client. Using sqlcmd to connect to the DB cluster. There is an alternative to open UDP 1434, though. You can use a SQL Server client to connect with Babelfish on the TDS port. Normally the SQL Server Browser service is started whenever named instances of the Database Engine are used. Just like TCP 80 must be open for outbound traffic if you want read web pages. Netsh advfirewall firewall add rule nameSQL Server 1433 dirin actionallow protocolTCP localport1433 netsh advfirewall firewall add rule name. The SQL Server Browser service listens for incoming connections to a named instance and provides the client the TCP port number that corresponds to that named instance. And for that to work, this port must be open for inbound traffic on the server and on the originating server, UDP 1434 must be open for outbound traffic. To connect to a named instance by name, you first need to talk to the SQL Browser service on UDP 1434. If the SQL 2017 instance is a default instance, you don't need to connect to tbe SQL Browser service to get the port number, but connection will be on TCP 1433 anyway. I still need to allow UDP outbound on the client machine. On the SQL Server it makes no difference. The SQL server is running fine but I cannot connect remotely without enabling UDP outbound on the client machine.If I disabled the firewall completely I understand that but then why do I have to open UDP protocol on the server where studio is running.
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