Hello everyone, SSH is good to use, but it lead out one safety question, if you keep port '22' open, someone may use sftp to transfer data, it's not permited in our LAN, how to resove the question? Either if have a way to recode the data transfer, just like vsftpd doing, I may check the recode and get to know what's happening, it'll be acceptable also. Thanks for your help! Have a good day! Regards, Joffre