Hello,
I am trying to connect to our internal sqlserver\tech instance (2008r2/sqlserver2008r2) from a 2008r2 server in our DMZ using sql authentication. The error message is:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.) (.Net SqlClient Data Provider)
I can connect to the default instance from the DMZ server with no problem
I can connect to the sqlserver/tech instance from inside the firewall
I have port 1433 and 1434 open in the DMZ firewall
PortQuery from the DMZ server gives me the following:
==== End of SQL Server query response ====UDP port 1434 is LISTENING
portqry.exe -n sqlserver -e 1434 -p UDP exits with return code 0x00000000.
=============================================
Starting portqry.exe -n sqlserver -e 1433 -p TCP ...
Querying target system called:
sqlserver
Attempting to resolve name to IP address...
Name resolved to 10.10.0.24
querying...
TCP port 1433 (ms-sql-s service): LISTENING
portqry.exe -n sqlserver -e 1433 -p TCP exits with return code 0x00000000.
I have TCP connections enabled on the sql server.
I have the sql browser service running.
I have tried turning off the firewall on the DMZ server - same error
I have opened ports 1433 and 1434 on the firewall in the dmz server - same error
The firewall on the SQL server is not enabled.
Any help you could offer on this problem would be greatly appreciated.
thank you in advance.