Need to insure that the app is running on only one machine

Question

Hi All,
I am working on forms 6 and I need to insure that the program will not transfer to another server.
Again,
I need to make my program works only on one server.

Answer 1

These can be spoofed. And getting a Mac address is outside the capabilities of PL/SQL and Forms, without some external assistance.
If I understand correctly, you are talking about a commercial app that you want to license and sell to be used on a single server - and you want to prevent that app from being used against other servers?
The typical way would be to install a license on the server. This can be in the form of a wrapped PL/SQL package header only.
It contains a checksum that you calculate using data such as the db name of the instance, the IP address of the server, etc. A couple of parameters, that together, provides a fairly unique identifier for that db instance on that customer's network. (or use multiple checksums)
This checksum is then stored, wrapped, in the PL/SQL license package in the server.
When your application logs on to the server, it queries these couple of parameters, determine the checksum, and then match that with the one stored in the PL/SQL license package. If the same, continue. If different, license violation.
Also, instead of just wrapping the license package header, you also may want to to encrypt it. Also consider obfuscating your app code that does the license check. Do not store the name of the license package, do not make a static call to it. Construct a cunning dynamic call to the license package that is not easily identifiable when dumping the application code to hex or assembler.
And limit the use of SQL and PL/SQL to the bare minimum when doing the license check - as all the calls made will be visible via the shared pool.