DNS
O’Reilly’s DNS and Bind
http://docstore.mik.ua/orelly/networking_2ndEd/dns/index.htm
cPanel 3rdparty software:
http://forums.cpanel.net/f77/third-party-applications-available-cpanel-whm-106785.html
NSF
http://www.faqs.org/docs/Linux-HOWTO/NFS-HOWTO.html#FIREWALLS
linuxguruz.org