Connect to SQL server using the internet

what is the Connection string for SQL Server 2008 over the internet using ip address.
I had used the below string:
"Provider=SQLOLEDB.1;Persist Security Info=False;Data Source =,1433;Network Library=DBMSSOCN;Initial Catalog=xxxx;User Id=xxxxxx; Password=xxxxx;"
It gives me error does not exist or access denied.

2 answers

Following are enabled and running.

  1. 1433 port enabled and working (inbound rule setting is done)
  2. SQL browser running (firewall setting enabled)