&gt; There&#x27;s a difference between blocking a customer&#x27;s access to external services, and blocking an outgoing web server port like 80 or 443.<p>There&#x27;s obviously a <i>difference</i>.<p>It is less obviously a <i>relevant difference</i> in regards to the FCC&#x27;s Open Internet rules.<p>&gt; The terms of use of your residential internet contract most likely prohibits using your connection in a &quot;commercial&quot; manner (running a full scale web server) out of your home.<p>To the extent that they purport to limit your right to use applications, devices, etc. that are not themselves unlawful on that connection, such provisions would appear to be in direct violation of FCC Open Internet regulations, which is probably among the reasons the ISPs with such rules also generally opposed the FCC adopting those regulations.