(If the P2P (PeertoPeer) traffic in the network (such as the traffic generated by BT download and eMule download) is too large, it will affect the normal operation of other services. The P2P current limiting function of Huasai USG series firewalls can limit P2P traffic and ensure the normal operation of other services. P2P current limiting is to accurately identify P2P traffic in the network through in-depth detection and behavior detection of P2P packets, and limit these traffic accordingly. The P2P throttling function on the USG can also limit P2P traffic by contacting ACL and setting the throttling rate in a specific time period to meet the different needs of users for throttling. If there is P2P traffic that cannot be recognized by the current USG in the network, you can control the new P2P traffic that keeps appearing in the network by obtaining a new pattern file. The current-limiting protocol is determined by the mode file. If there is no activated mode file, the command firewallP2P-carincludeprotocol cannot be executed.)