Various tasks you are accustomed to perform by means of a Container (accessing your web site or sending email and the like) may fail if the corresponding services are inaccessible.
Try consecutively the following three steps to determine the reason for this and do away with the trouble:
psa
and
mysqld
must be running for the Plesk control panel to handle your requests,
httpd
- for your web site to function properly,
sshd
- for the Container to be accessible by
ssh
,
sendmail
- for you to be able to send email,
popa3d
- to receive email by the POP3 protocol, etc. You may also try to stop the
iptables
service to see if it solves the problem, because some
iptables
rules might prevent certain network connections.
If the Plesk control panel is installed inside the Container you are managing and you are working with this panel, the Service Unavailable screen may sometimes be displayed when you are trying to perform this or that Plesk-related operation. This situation is normally handled as described above. However, in case none of the recommended measures works, you may have to reinstall the Plesk control panel into the Container, as the Plesk installation might be corrupted.