We are running ISPConfig 18.104.22.168 on a CentOS 5 machine for about 2-3 years without issues. Now we have to add another SSL certificate to on of the installed domains. There is already another domain with SSL certificate and working without issues. The second cert is installed proper and the config looks fine. However, if we reach the domain via https, the wrong certificate be used. Is there a way to check, if apache is compiled with SNI support? The config of each vhost is set to use the GIP and not just *:443.