My recently built LAMP stack to replace the FAMP stack resulted in SSL Server’s certificate chain incomplete in Qualys’ SSL labs test. To rectify this, we need to specify the generated SSLCertificateChainFile in the vhost configuration.
Edit the vhost.conf
Open the related .conf file. Add the following line above or below the SSLCertificateFile line, replacing “domain.rootdomain ” to whatever your domain is:
Modify the SSLCertificateFile directeive to use “cert.pem”
Restart Apache and run another test.