This module exploits a vulnerability in the CA License Client service. This exploit will only work if your IP address will resolve to the target system. This can be accomplished on a local network by running the nmbd service that comes with Samba. If you are running this exploit from Windows and do not filter udp port 137, this should not be a problem (if the target is on the same network segment). Due to the bugginess of the software, you are only allowed one connection to the agent port before it starts ignoring you. If it was not for this issue, it would be possible to repeatedly exploit this bug.