Hosting WCF Service that accesses SQL database onto IIS

Question

I have a WCF service that accesses a SQL database to fetch data . I would like to deploy this service onto IIS . However , when i do this , my service is not able to access the database . This is how my service accesses the DB

    SqlConnection thisConnection = new SqlConnection(@"user id=SAIESH\Saiesh Natarajan;" +
                                   "password=;server=SAIESH\\SQLEXPRESS;" +
                                   "Trusted_Connection=yes;" +
                                   "database=master; " +
                                   "connection timeout=30");

I need to know what i should do to be able to access this DB from my WCF service hosted on IIS

Answer 1

Under IIS your service usually will be executed under NETWORK SERVICE account. In your connection string you use trusted_connection=yes . So, you need grant access to NETWORK SERVICE account. But better solution is to change authentication scheme and use USERNAME/PASSWORD to connect to SQL server.
Actually here is similar question WCF Impersonation and SQL trusted connections?