Hello There, First and foremost, "ISPConfig3", thank you guys for this awesome product And also thank you Falko for this awesome howto (The Perfect Server - CentOS 6.4 x86_64 (nginx, Dovecot, ISPConfig 3)) I followed the tutorial and I'm happy to say my first ISPConfig is running with all systems online. My goal is to have an internal webserver to provide a platform to develop and prototype my customer’s web sites I want to implement internal subdomains, of my external public domain, for any or all of my customers. I want to implement split-brain DNS for security purpose I also want to protect access to my other servers using OpenVPN especialy my NX and Windows rdp My setup is like this: (The Perfect Server - CentOS 6.4 x86_64 (nginx, Dovecot, ISPConfig 3)) virtualized on Xenserver 6.2 Running in a Windows Active Directory Domain (providing DHCP / DNS / AD) environment The IPSConfig server is integrated in AD with PowerBroker open (tested and working) It's name is say isp.abc.my-domain.com on static ip 192.168.1.20 The AD domain is lets say abc.my-domain.com It's name is say pdc.abc.my-domain.com (also on xen) static ip 192.168.28.15 My ISP is giving me a DHCP ip also My router is pfSense 2.1 lan IP 192.168.1.1 1- First I'd like your insight to help me to validate this setup. 2- Considering that my router’s public ip is dynamic a.) Is it possible to publish my servers ip without dynamic dnsb.) How should I setup my external dns services as to meet ISPConfig name servers requirements. Any help or comments is welcome and much appreciated. This post Best Regards Franck