Linux Patch Management: Keeping Linux Systems Up To Date
Here are some of the key points from the certification objectives in Chapter 11.
Understanding DNS: Zones, Domains, and Delegation
| ❑ | DNS is based on the Berkeley Internet Name Domain (BIND), using the named daemon. |
| ❑ | Key packages include bind-chroot, which adds security by supporting DNS in a chroot jail. |
The Berkeley Internet Name Domain (BIND)
| ❑ | Critical DNS configuration files include /etc/named.conf and the files in the /var/named directory. |
| ❑ | Caching-only DNS servers store requests and their associated IP addresses on a computer. |
| ❑ | Slave DNS servers need to point to a master DNS server, with the appropriate masters directive in /etc/named.conf. |
| ❑ | Every time you change DNS, remember to update the serial number in your zone file. Otherwise, other DNS servers don't realize that you've changed anything. |
BIND Utilities
| ❑ | There are a number of BIND utilities that can help you manage the service, including rndc and rndc-confgen. Others can help you check the database, including dig and host. |