Port probing is the process by which a hacker attempts to gain access or control of a customer's computer.
What You Should Know
We can’t prevent a customer from being probed. However our Acceptable Use Policy prohibits customers from port probing anyone on our infrastructure and Internet. Hacking computer systems has been a part of the Internet from its very beginning and will always be a part of it. Many times hackers start automated programs that systematically search through an ISP's infrastructure looking to gain access to computers that are vulnerable.
Once a computer system is compromised, these programs replicate themselves (like a virus) and begin to search the Internet again. Unfortunately, nothing can be done to prevent the probes from happening, as it is very difficult to distinguish this type of traffic from other types of network traffic.