FTP https://systembash.com/evaluating-ftp-servers-proftpd-vs-pureftpd-vs-vsftpd/ http://linuxdev.dk/articles/pureftpd-over-tls https://doc.ubuntu-fr.org/vsftpd#vsftpd_et_ssl https://renoirboulanger.com/blog/2010/04/procedure-pour-creer-un-serveur-ftp-securise-ssl-force-avec-usager-virtuels-sous-ubuntu-linux-avec-vsftpd/ http://www.linux-france.org/article/lgazette/issue-34/lg-34-2.html https://www.gnu.org/software/inetutils/manual/html_node/The-_002enetrc-file.html https://gist.github.com/technoweenie/1072829
