http://forum.parallels.com/showthread.php?t=71806&highlight=subdomain+ssl+certificate
Not sure if that works since i have not tried is my self . Also found this on a forum
How-To Install SSL on a subdomain on Plesk 8
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I don't know where SW Soft gets off suggesting that PSA8 has SSL support for subdomains because it doesn't. I had to hack my way around their shortcomings so here's how I did it.
1. Add your subdomain
You can do this as a normal subdomain or as a standalone domain. I haven't tried this with a normal subdomain but it should work.
2. Add your certificate to Plesk
Use the Plesk control panel to add your certificate. Where the shortcoming comes into play is that Plesk will continue to use the default certificate.
3. Find your certificate
SSH in and head over to /usr/local/psa/var/certificates and do
Code:
#ls -laTake note of the file name cert-xxxxxx that has today's creation date (there should be only one). Write down that file name.
4.Copy the include file
go to /var/www/vhosts/sub.domain.com/conf and open the httpd.include file
Find where it has
Code:
ServerName sub.domain.com:443Copy the entire VirtualHost block for JUST the SSL portion.
5. Make your include file
Head over to /etc/httpd/conf.d and make a file. Call it something like z0-include.conf. We need this file to load after ssl.conf but before zz010_psa_httpd.conf. Paste your entire file in. Now look for this line
Code:
SSLCertificateFile /usr/local/psa/var/certificates/cert-xxxxxxSee how the file name doesn't match up? Edit this line and put in the file name from Step 3.
6. Restart Apache
Code:
#service httpd restartThat should fix the problem and load the proper certificate.
Update us let us know if you get this works for plesk 9