Port Control Protocol (PCP) is a computer networking protocol that allows hosts on IPv4 or IPv6 networks to control how the incoming IPv4 or IPv6 packets are translated and forwarded by an upstream router that performs network address translation (NAT) or packet filtering.By allowing hosts to create explicit port forwarding rules, handling of the network traffic can be easily configured to
Routers Supported by Screens Connect – Support - Edovia Inc. If you use a router not manufactured by Apple, verify that it supports NAT-PMP (NAT Port Mapping Protocol) or UPnP IGDv1 (Universal Plug and Play Internet Gateway Device). Also, install the latest firmware available for your model. Check the manufacturer's website … UPnP and NAT-PMP port mapping(quick question) : torrents uPnP and NAT-PMP are used for dynamic port forwarding so that NAT wall doesn't block those inbound connections whose entries are not registered in the NAT mapping table. By default, NAT blocks those inbound connections to whom you didn't send any request earlier.
UPnP and NAT-PMP are simply different implementations of the same concept, automated NAT port mapping. These protocols are designed to allow clients to automatically configure the port-forwarding rules of a router/firewall. A common example is to enable UPnP so that an Xbox 360 can successfully connect to Xbox Live.
Jan 07, 2008 [PSA] Networking Info: Part 2 - NAT, DNS, UPnP WTF May 21, 2013
nat-pmp-mapport.pubport . the external port to map on the router. The specified port is treated as the requested port. If the port is available it will be allocated to the caller, otherwise the router will simply choose another port, create the mapping and return the resulting port. nat-pmp-mapport.lifetime
NAT Port Mapping Protocol (NAT-PMP) is a network protocol for establishing network address translation (NAT) settings and port forwarding configurations automatically without user effort. Good old Wikipedia has links you may find interesting – Optimize Your uTorrent Experience (14 Easy Hacks) Apr 21, 2020