Use Views to Partition External and Internal Information

Description

If it is not possible to run external and internal nameservers on separate physical systems, run BIND9 and simulate this feature using views. Edit /etc/named.conf. Add or correct the following directives (where SUBNET is the numerical IP representation of your organization in the form xxx.xxx.xxx.xxx/xx):

acl internal {
  SUBNET ;
  localhost;
};
view "internal-view" {
  match-clients { internal; };
  zone "." IN {
    type hint;
    file "db.cache";
  };
  zone "internal.example.com " IN {
    ...
  };
};

view "external-view" {
  match-clients { any; };
  recursion no;
  zone "example.com " IN {
    ...
  };
};