One of the major worries for Bitcoin users all around the world, comes in the form of internet service providers blocking ports used by Bitcoin software clients. Just last week, it looked like US ISP ATT had effectively started blocking ports used by Bitcoin software. Although these actions were refuted by company representatives, is this something we should worry about, or not?
ATT Not Actively Blocking Bitcoin Software Ports
No ISP will ever randomly start blocking certain ports unless properly communicating this to their customers. On an individual level, blocking ports may occur if there are discrepancies occurring on a regular basis. For example, some ISP’s will block any port between 1000 and 8000 for reasons only known to them.
In the case of US provider ATT, a lot of people were complaining about the issues they experienced when using port 8333. For those of you who have no idea about the significance of this port, 8333 is used by the Bitcoin software when running a full Bitcoin node to support the network. locking that specific port would make a node inaccessible.
While it would come as no surprise to find