said by DrStrangLov: said by Gunn:
Further, from time to time, ViaSat may block additional ports that it reasonably believes may be a security risk to the network."
I am surprised they still recycle that old line. A security risk maybe if you throw a factory windows 98 machine on directly connected to the modem. Modern routers will block these attacks, as will well configured software firewalls. Of course there are a lot of people who still use Windows XP with a crappy firewall or use Mint/Ubuntu with the default configuration of no firewall. But that is not the ISP's problem.
ISPs should not block any ports unless requested.