Hi team, we made the following installation in a new server.

Server Platform: Win2008 Standard R2 32bit
Database: SQL Server Express 2008 R2

SQL Firewall Exception
135 – Transact SQL Debugger TCP
1433 – SQL Traffic TCP
1434 – SQL Browser Traffic UDP
2383 – SQL Analytics Traffic TCP
4022 – SQL Broker Traffic TCP

Instance: SQLEXPRESS

The sql browser and service is running properly.

We use a small application for testing connection with parameters
1. host ip
2. sql instance
3. database
4. login user
5. port

The application return a valid connection when run locally. But when tested remotely it returns an invalid connection.

Even turning off host firewall did not make any difference. Anything missing in the setup?