I am preparing servers infrastructure consisting MYSQL , LDAP , PHP and FTP.
I have all servers have static public and private IP(LAN). Now while configuring SSL i am facing problem of FQDN.
For connecting all servers , should I use direct IP address or FQDN ? FQDN for internal purposes are secure ? How can I use it ?
For example, ldap.mysite.com , mysql.mysite.com or ftp.mysite.com. On the other side, i can directly use 100.xxx.yyy.zzz ip address of ldap.mysite.com (for PHP connectivity)
(I absolutely don't want anyone to know subdomains or any internal structure.)