Hi...! i need some help please... I was searching a lot in the forum about my problems, i tried all the solutions given to another users with no success, i have two big problems. I have an ISPConfig 18.104.22.168p8 Installation on Ubuntu Server 15.04 i followed the Perfect Server tutorial, at first all was OK i was using only one site with an IP address instead a domain for testing. Since today i have this problems: When i try to login via FTP to the only user of the only site in my installation i get an "Failed to retrieve directory listing" on Filezilla, i tried the solutions in this posts with NO SUCCESS: https://www.howtoforge.com/community/threads/pure-ftpd-failed-to-retrieve-directory-listing.65942/ https://www.howtoforge.com/community/threads/pure-ftpd-passive-ports-setup.52838/ https://www.howtoforge.com/community/threads/ftp-cant-access-folder.70080/ (here it says to open the ports on my firewall, ON ISPCONFIG when i try to add a new Firewall RULE and open 20,21,22,25,53,80,110,143,443,587,993,995,3306,8080,8081,10000,50000:50100 PORTS i get totally blocked, i cannot even access the web interface of ISPCONFIG or ftp, or nothing. i used THIS Tutorial to get access again and remove the firewall RULE https://www.howtoforge.com/community/threads/ispconfig-3-firewall-problem.61808/) I still have the same error, cannot list the root directory of the account, SOMETIMES it get pass, but when i try to enter any folder again cannot list "Failed to retrieve directory listing". On Filezilla detailed log the error comes after the "Command: MLSD" This is driving me crazy, thanks for your help, after solve this problem i will ask for the other please. i dont want to mix the problems. Regards!