On Feb 26, 2016 8:34 AM, "Keith Medcalf" <kmedcalf@dessus.com> wrote:
ISP's should block nothing, to or from the customer, unless they make it
clear *before* selling the service (and include it in the Terms and Conditions of Service Contract), that they are not selling an Internet connection but are selling a partially functional Internet connection (or a limited Internet Service), and specifying exactly what the built-in deficiencies are.
Deficiencies may include: port/protocol blockage toward the customer (destination blocks) port/protocol blockage toward the internet (source blocks) DNS diddling (filtering of responses, NXDOMAIN redirection/wildcards,
Traffic Shaping/Policing/Congestion policies, inbound and outbound
Some ISPs are good at this and provide opt-in/out methods for at least
etc) the first three on the list. Others not so much.
Every ISP I have felt with that messes with the DNS, has no valid opt-out other than using different DNS. The opt-out they use is a HTTP cookie, which only works for web browsers. It doesn't work for any other program.