Everyone a great god, and in window2012 R2, installed Serv - U_FTP_Server_15. 1.5, and configure, also opened the firewall port, 20, 21 In the client connect to the server, you will be prompted to connect failed (connection timeout), Question: 1. Connect the cause of the failure, how to solve? 2. In the process of the allocation of serv - u, when configuring IP addresses that one step, is to fill in the IP address of the server, or choose a drop-down box (172.18.217.157 and 127.0.0.1) network address? I try to fill in the server's IP address and 172.18.217.157, client connection prompts the connection fails; 3. The FTP client (FlashFXP) the address of the new site should be fill in the IP address of the server? Thank you god give directions,