Visitor network control method and router

The invention belongs to the field of communication, and discloses a control method of a visitor network, which comprises the following steps of: 1, monitoring any webpage access request of the visitor network, and connecting a virtual interface of the visitor network to a physical interface of a router through a first bridge interface; 2, when a webpage access request is monitored, the access is directed to a specified port through a visitor network HTTP service, and the specified port is used for accessing a mandatory portal; the mandatory portal is used for providing an authentication page for a visitor; and step 3, when the visitor device inputs the correct user name and password on the authentication page and the verification is passed, the visitor device accesses the external network through the virtual interface, the first bridge interface and the physical interface. According to the method, a virtual interface of a visitor network is bridged to a physical interface through a bridge interface, the visi