Commercial packages of SSH Tectia Server use the license file license_ssh2.dat.
To verify the type of the SSH Tectia Server package you are using, you can view version information with the following command:
$ ssh2 -V
When you acquire a license for an evaluation version of the software, the appropriate license file must be copied into the correct location. The license file is typically stored in the /etc/ssh2/ directory, but a different location can be specified by setting the environment variable SSH_LICENSE_FILE.
The license file specifies the type of the license and indicates that the software has been legally purchased. The file should be safely stored.