I setup a Linux server and run a command,
host wan ip in terminal and it shows
... domain name pointer mail.domain.com.
How do i replace current new
DNS works in both directions.
mostly it is used to map a human memorizable name (e.g.
to change the IP-address that is resolved vrom
but it also works the other way round, to map IP-addresses to domain names.
IP-addresses are (like domain-names) hierarchical in nature, but (unlike domain-names) the highest-level is on the left side.
mapping works via
to change the name that is resolved from the IP-address
so in order to change the reverse-lookup, you must find out who is in charge of your IP-range and request that they fix the PTR record.