Applicable to:
- Plesk for Linux
Symptoms
- FTP connection is randomly dropped during file transfer on Plesk server.
- Errors in FileZilla client log:
CONFIG_TEXT: 8000 3 Command: PORT 127,0,0,1,243,14
8000 3 Response: 500 Illegal PORT command - Following entries can be found in
/var/log/secure:
CONFIG_TEXT: proftpd: pam_env(proftpd:setcred): Unable to open config file: /etc/security/pam_env.conf: Permission Denied
proftpd: pam_systemd(proftpd:session): Failed to connect to system bus: Permission Denied
- One of the following errors appear in
/var/log/messages:
CONFIG_TEXT: proftpd[3013]: 0.0.0.0 (203.0.113.2[203.0.113.2]) - Refused PORT 127,0,0,1,243,36 (address mismatch)
proftpd[3013]: 0.0.0.0 (203.0.113.2[203.0.113.2]) - Refused PORT 127,0,0,1,243,38 (address mismatch)
CONFIG_TEXT: linuxweb proftpd[95390]: 0.0.0.0 (203.0.113.2[203.0.113.2]) - error initializing connection: Permission denied
linuxweb proftpd[95390]: 0.0.0.0 (203.0.113.2[203.0.113.2]) - FTP session closed.
CONFIG_TEXT: proftpd[17591]: 0.0.0.0. (203.0.113.2[203.0.113.2]) - error initializing connection: Permission denied
Cause
SELinux prohibits using passive ports for FTP connection.
Resolution
-
Connect to the server using SSH.
-
Configure SELinux to allow passive ports during FTP connection:
# setsebool -P ftpd_use_passive_mode 1
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