After disable IPv6 FTP logins are delayed

Created:

2016-11-16 13:01:20 UTC

Modified:

2017-04-24 12:00:07 UTC

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After disable IPv6 FTP logins are delayed

Applicable to:

  • Plesk 12.5 for Linux
  • Plesk 12.0 for Linux

Symptoms

After disabling IPv6 support on server login are delayed and some are failed with Connection timed out .

Status: Resolving address of example.com
Status: Connecting to 1.2.3.4:21...
Status: Connection established, waiting for welcome message...
Error: Connection timed out
Error: Could not connect to server

Cause

IPv6 support was not disabled in proftpd settings.

Resolution

Add the following in /etc/proftpd.conf

UseIPv6 off
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