PCP introduction


The Port Control Protocol (PCP) establishes PCP connections between customer premises equipment (CPE) and Carrier Grade NAT (CGN) devices to implement point-to-point (P2P) applications between terminal users accessing different CGN devices. PCP is used in two-level Network Address Translation (NAT444) and Dual-Stack Lite (DS-Lite) scenarios. In a PCP application, a CGN device functions as a PCP server, and a CPE functions as a PCP client. The CGN devices assign public IP addresses and port numbers to the users on the CPEs. A P2P server uses the public IP addresses and port numbers to establish P2P connections between terminal users so that the users connected to the CGN devices can access P2P services, such as teleconferences, online games, and P2P data transmission.

Other related questions:
PCP configuration
Configure PCP as follows: 1. Configure the NAT address pool. 2. Configure the PCP policy. 3. Configure the PCP optional functions. For details, see "Configuring PCP" in the firewall product documentation.

Command used to view PCP policies
You can use the following command to view the PCP policy: display pcp-policy rule { all [ slot slot-id cpu cpu-id ] | name rule-name }

how to configure PCP on USG ?
The steps to configure the PCP are as follows: 1 configure NAT address pool 2 configure PCP policy 3 configuration PCP optional function Detailed configuration steps in the "firewall product documentation >" search "configuration PCP" content.

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