Recently we faced a problem where Plesk was not accessible over Internet i.e. using port 8443 (https) and 8880 (normal). The first thing we checked was the Firewall; it happens sometime that the problem might be with firewall which was blocking port 8443 and 8880 but there was no problem with Firewall. Then we tried to check the status of Plesk (PSA) Service and got following response

While checking for logs (Plesk Logs) on /usr/local/psa/admin/logs/error_log it was showing following Messages

Now we have used command “/usr/sbin/lsof -i | grep http” (without quotes) and then killed the process using the ID. After that we have removed the Plesk Lock

But starting Plesk service didn’t fixed the problem. Still we were getting “could not bind to port 80” Error.

Now we have opened Plesk Apache Configuration file which include Apache (Web Server) Configuration of Plesk Control Panel.

and found that the User has changed the Plesk Port and set it to listen on port 80 which is default port of HTTPD

So, we have made necessary changes httpsd.conf file i.e. disabled Port 80 and allowed 8443 and 8880 in Plesk Apache Configuration and restart PSA.

NOTE:- Here the problem was with Plesk Apache configuration but there might be some different problems too. I have posted this fix which will help to understand Plesk Error Log file and Plesk Apache Configuration files. If any of the USER face different problem and knows the FIX Let me know through Contact form I will be happy to post here.

Recently while changing the name of a domain from Plesk (Linux) it thrown following Error:

No such parameter 'handler-type' for handler '10-spam-MVquwk'
Unable to get type of handler: 10-spam-MVquwk

No such parameter 'handler-type' for handler '10-spam-LztqGr'
Unable to get type of handler: 10-spam-LztqGr

The problem is due to orphaned handlers in /usr/local/psa/handlers Directory. Whenever a domain name has been changed whole mail handler system is checked by Plesk. We have created handler directory copy in /usr/local/psa/handlers.copy and removed problem handlers manually. Then executed mail reconfiguration utility:

# /usr/local/psa/admin/sbin/mchk --with-spam
==> Checking for: mail_spam_restore... ok
==> Checking for: mailsrv_conf_init... ok
==> Checking for: mail_mailbox_restore... ok
==> Checking for: mailsrv_entities_dump... ok
==> Checking for: mail_auth_dump... ok
==> Checking for: mailman_lists_dump... ok
==> Checking for: mail_responder_restore... ok
==> Checking for: mail_drweb_restore... ok
==> Checking for: mail_kav_restore... not exsists
==> Checking for: mail_spf_restore... ok
==> Checking for: mail_dk_restore... ok

After this we were able to rename the domain successfully:

# /usr/local/psa/bin/domain --update supportest123.com -new_name 123testsupport.com
SUCCESS: Update of domain 'supportest123.com' complete.

If the any problem noted due to the removal of Email Handlers, changes can be reverted using the backup directory which has been created before clearing handlers.