Question

I am accessing SQL Server over a VPN.

Is there a way to use a sql query to find the port number I am communicating over?

Answer 1

For the default instance it would be:

DECLARE @tcp_port nvarchar(5)

EXEC xp_regread
 @rootkey = 'HKEY_LOCAL_MACHINE',
 @key = 'SOFTWARE\MICROSOFT\MSSQLSERVER\MSSQLSERVER\SUPERSOCKETNETLIB\TCP',
 @value_name = 'TcpPort',
 @value = @tcp_port OUTPUT

select @tcp_port

For a named instance it would be:

DECLARE @tcp_port nvarchar(5)

EXEC xp_regread
 @rootkey = 'HKEY_LOCAL_MACHINE',
 @key = 'SOFTWARE\MICROSOFT\MSSQLSERVER\PutYourInstanceNameHere\MSSQLSERVER\SUPERSOCKETNETLIB\TCP',
 @value_name = 'TcpPort',
 @value = @tcp_port OUTPUT

select @tcp_port