Article ID: 113504, created on Mar 22, 2012, last review on Mar 11, 2015

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.5 for Linux
  • Plesk 10.4 for Linux/Unix


FTP service fails to start with the following error:

 2011-12-28T10:06:42.255300+01:00 server xinetd[503]: socket creation failed (Address family not supported by protocol (errno = 97)). service = ftp
 2011-12-28T10:06:42.255306+01:00 server xinetd[503]: Service ftp failed to start and is deactivated.`


The issue is caused by disabled IPv6 support on the host:

 # grep v6 /etc/modprobe.conf
 alias ipv6 off
 options ipv6 disable=1
 # grep -i v6 /etc/sysconfig/network


In /etc/xinetd.d/ftp_psa, remove the line as shown on the example below:

service ftp
        flags           = IPv6 <== REMOVE
        flags           = IPv4 <== ADD
        disable         = no
        socket_type     = stream
        protocol        = tcp
        wait            = no
        user            = root
        instances       = UNLIMITED
        server          = /usr/sbin/in.proftpd
        server_args     = -c /etc/proftpd.conf

NOTE: this changes could be lost after Plesk upgrade.

Search Words

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Status: Connection established, waiting for welcome message...

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