About: http://webisa.webdatacommons.org/417459895

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In most cases, block all ports that are not exclusively required by these services.This is tricky, because you can easily block yourself from services you need, especially services that use ephemeral ports, as explained earlier.
http://www.w3.org/ns/prov#wasQuotedFrom	governmentsecurity.org