Fix kerberox.

kerberox.yml

@@ -16,8 +16,12 @@
 
     ## LAN IP address range:
     ipaddr_lan: 192.168.0.10/24
-    dhcp_range: 192.168.0.50,192.168.0.99,2h
-    in_inventory: 192.168.0.[50:99]
+    ipaddr_lan_threeoct: "{{ ipaddr_lan.split('.')[0:3] | join('.') }}"
+    ipaddr_lan_ptr: "{{ (ipaddr_lan | ipaddr('revdns')).split('.')[1:] | join('.') }}"
+    ipaddr_lan_ptr_threeoct: "{{ ipaddr_lan_ptr.split('.')[0:3] | join('.') }}"
+    dhcp_start: 192.168.0.50
+    dhcp_stop: 192.168.0.150
+    in_inventory: 192.168.0.[50:150]
 
     di_dist: "{{ ansible_distribution_release }}"
     di_version: "{{ ansible_distribution_major_version }}"
@@ -47,8 +51,8 @@
   roles:
     - up2date_debian
     - firewalld2if
-    - netbootinstaller
     - dnsmasq
+    - netbootinstaller
     - aptcacher
     - role: krb5kdcldap
       when: not run_in_installer|default(false)|bool