Old Tips when using the Tianwang firewall: UDP packets received by 68.68.68.68, the local port: 123, the other port: 21845 This package is intercepted. A: This is the Huawei switch. The purpose of this packet is to detect whether there is a loop in the network, the content of the data package is randomly filled with the programmed person, and many logs have not been seen in the firewall. Later The version has changed the format of the packet.
