> If Bind version of primary dns is "bind-libs-9.3.6-16.P1.el5" and for > secondary dns "bind-9.5.0-29.b2.fc9.i386". Something wrong there: "libs" vs. "server", but I assume you mean server for both. > Is it mandatory the same version for > primary and secondary DNS. Not unless you rely on a particular feature of the higher version. -JP