Article ID: 175, created on Oct 6, 2008, last review on Apr 16, 2012

  • Applies to:
  • Plesk for Linux/Unix


Make sure that port 21 is opened on the server for incoming connections:
nmap -p21 -P0 SERVER_IP

Check the /var/log/messages file for any FTP related errors. If you are getting a PAM authentication error, you need to disable PAM in the /etc/proftpd.conf file (RPM-based Linux OS):

AuthPAM off

Make sure that the inetd/xinetd server is running. If it is not running you also may be experiencing problems with sending mail (SMTP), as soon as SMTP service usually works under the server control.

#ps -aux | grep inetd

#ps -aux | grep xinetd

If inetd/xinetd is not running it must be started.

for Linux servers:
#/etc/rc.d/init.d/xinetd start

for FreeBSD servers:
#/usr/sbin/inetd -wW

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