There is slow connection responses (login takes a long time) during FTP sessions

Created:

2016-11-16 12:48:39 UTC

Modified:

2017-08-08 13:31:23 UTC

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There is slow connection responses (login takes a long time) during FTP sessions

Applicable to:

  • Plesk 12.5 for Linux

Symptoms

There is slow connection responses (login takes a long time) during FTP sessions.

Cause

  1. This is probably caused by a firewall or DNS timeout.
  2. Service proftpd listens on IPv6.

Resolution

  1. Try disabling reverse dns and ident lookups in /etc/proftpd.conf :

    UseReverseDNS                   off
    IdentLookups off
  2. Try disabling IPv6 support since proftpd might listen on that sockets

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