Thank you very much for your advice & it is really helpful to setup my servers with name servers like ns1.mydomain.com & ns2.mydomain.com.
I have one more questions on DNS, My System>Server Config looks like as under;
Netmask : 255.255.255.0
Gateway: xx.xxx.xxx.1 ( this address I collected vi /etc/network/interfaces)
Nameservers: 192.168.0.1 , 192.168.0.2 ( These are by default)
If I run vi /etc/resolv.conf then my hosting data centre's are
Sir, my question is should I replace Name servers from 192.168.0.1 , 192.168.0.2 to xx.xxx.xxx.11 & xx.xxx.xxx.22 or xx.xxx.xxx.33
many thanks & regards,