According to our cybersecurity report, our networks are scanned by hackers from certain countries. Therefore, we are limiting all IPs to the U.S. only. This may block most hacking attempts. However, some hacker do use VPNs to fake their IPs. Therefore, we highly suggest that each customer verify the digital signature before deploying it in your systems for your system’s safety. (Our publisher should sign software and do not use the cert. If it has been revoked or has already been tampered with. Please report it to us ASAP at report@cisys.us)