The port in network technology usually refers to the service port in the TCP/IP protocol, and there are 0-65535 ports in total. Some ports are often used by hackers to implant Trojan viruses and invade computer systems, thus causing security threats. So it is recommended to disable these ports at the network security device. Mainly include: TCP 135, 139, 445, 593, 1025 ports and UDP 135, 137, 138, 445 ports, and backdoor ports of some popular viruses (such as TCP 2745, 3127, 6129 ports). Other ports are shown in the figure and can be disabled as required.
