References

• The Red Hat customer portal: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/

• The iftop Wikipedia home page: http://en.wikipedia.org/wiki/Iftop

• The Domain Name System Security Extensions Wikipedia home page: http://en.wikipedia.org/wiki/Domain_Name_System_Security_Extensions

• The BIND project home page: https://www.isc.org/downloads/bind/

• The BIND Wikipedia home page: http://en.wikipedia.org/wiki/BIND

• The RHEL customer portal – Chapter 19: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/ch-bind.html