turn on 'port forwarding' if your router has such service.
a*a
2 楼
check your ip: start->run->cmd->ipconfig, there should be one like 192.168.0.x, copy this address to ip setting in serv-u. also, since you are using router, you need to set port forwarding of the computer on which you run serv-u. read carefully the user manual of your router, open port 21 of 192.168.0.x, i.e., the computer you run serv-u. or you can enable DMZ of that computer, but in this case the computer is bypassing the firewall and completely open. find in the adminstration page of your rou