the TCP or UDP port is known by (Domain and web hosting)
the TCP or UDP port is known by the term REDIRECT. SNAT, DNAT, and REDIRECT are targets that you may use with the iptables command to build more complex and sophisticated rules. The topic of Network Address Translation and its uses warrants at least a whole chapter of its own.68 Unfortunately we don’t have the space in this book to cover it in any greater depth. You should read the IPTABLESHOWTO for more information, if you’re interested in discovering more about how you might use Network Address Translation. … and perhaps even a whole book!