Almost all ports are open by default on all our data centers; however, the following ports are permanently blocked in the following data centers for security reasons, and cannot be lifted.
Here are the details:
The SMTP ports (25, 587, 465, and 2525) are blocked on our Cloud platform (panel.cloudzy.com), as well as a few regions on the legacy VPS platform (support.cloudzy.com):
Dallas (High-end CPU) and Chicago, IL datacenters,
Netherlands
Phoenix, AZ
San Francisco, CA
Miami, FL
udp/139
udp/11211
udp/1432
tcp/135
tcp/136
tcp/137
tcp/138
tcp/139
tcp/445
tcp/593
tcp/4444
That's it.
Any ports other than the above ones are open on our data centers, and you may need to open the port on the VPS OS firewall if needed.