Setup DNS Resolution With “resolv.conf” in Examples

The /etc/resolv.conf configuration file contains information that allows a computer to convert alpha-numeric domain names into the numeric IP addresses. The process of converting domain names to IP addresses is called resolving. When using DHCP, dhclient usually rewrites resolv.conf with information received from the DHCP server. How do I edit the “/etc/resolv.conf” file? Use text […]

Setting Up Reverse DNS — PTR Record

What is the reverse DNS? Reverse DNS is an IP address to domain name mapping – the opposite of Forward DNS which maps domain names to IP addresses. Comparison: ## FORWARD LOOKUP ## # host centos.org centos.org has address 72.232.194.162 ## REVERSE LOOKUP ## # host 72.232.194.162 162.194.232.72.in-addr.arpa domain name pointer www.centos.org. What does the […]