Can SQLJ applications work across firewalls?
Yes–there are no firewall limitations specific to SQLJ. Because the runtime environment for a SQLJ application consists of a thin layer of pure Java code on top of a JDBC driver, a SQLJ application will work with any firewall with which the chosen JDBC driver will work. The Oracle JDBC OCI driver and Thin driver can work in either an intranet or extranet setting. In an extranet deployment, the drivers can be used with firewalls which have been SQL*Net certified.