Look at your question and you will know that you need to play remote control. If the router logs in and directly looks at the IP of the local intranet, if it is 192. 168. 1, then the password of the direct login account is generally the default admin, followed by the virtual service settings. Select the port you need to open, IP Select the IP of your intranet, and then enable Save. The protocol is TCP. Then set the local intranet IP in DMZ and save it. For example, if it is http, then port 88 is mapped. Then, you can change http to 88 and fill in the external network address to build a successful http ftp. If not, Baidu and rapier netcom have tutorials.