$ rpm -qa vsftpd
From the changelog
* Fri Jan 05 2018 Ondřej Lysoněk <firstname.lastname@example.org> - 3.0.3-16
- Disable tcp_wrappers support
- Resolves: rhbz#1518796
- Fix default value of strict_ssl_read_eof in man page
This causes both "telnet ip 21" and Cobian Bckup to give the following error:
500 OOPS: tcp_wrappers is set to YES but no tcp wrapper support
compiled in Connection closed by foreign host.
The cure is to remove tcp_wrappers from /etc/vsftpd/vsftpd.confg
GUYS!!!! NOT FUN TO TRY TO FIGURE OUT !!!!!
Request for Enhancement: when starting vsftpd and "tcp_wrappers" is found to be set to "YES", please consider WRITING AN ERROR MESSAGE to the system journal! If it is not supported, vsftpd startup SHOULD COMPLAIN!
This message is a reminder that Fedora 28 is nearing its end of life.
On 2019-May-28 Fedora will stop maintaining and issuing updates for
Fedora 28. It is Fedora's policy to close all bug reports from releases
that are no longer maintained. At that time this bug will be closed as
EOL if it remains open with a Fedora 'version' of '28'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.
Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 28 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.
Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.