Support,
What happened yesterday with psa-proftpd.x86_64 0:1.3.7rc3-3.el7.art and now psa-proftpd.x86_64 0:1.3.7rc3-4.el7.art?
421 Service not available, remote server has closed connection
yum downgrade back to psa-proftpd.x86_64 0:1.3.7rc3-2.el7.art
220 ProFTPD 1.3.6rc2 Server xxxx
Clearly the packages are broken or contain some configuration change that doesn't happen and breaks ftp totally.
This seems the best forum to place this..
Cheers,
David