[newbie] Primary and Secondary DNS on the Same Machine?

[Benjamin Branch]

Is it possible to run Primary and Secondary DNS on one machine and if so, how might i do this.  As it stands i have DNS running on Mandrake 6.0 as a primary server, but the some of the other networking companys that i'm working with want it to be there secondary DNS provider so i am searching for a way to do this if it is possible.  Thank you for your help.   Benjamin Branch