《NetBSD指南-25.2.3./etc/namedb/zone.127.0.0》
发表于 : 2010-03-08 1:26
This is the reverse lookup file (or zone) to resolve the special IP address 127.0.0.1 back to "localhost":
In this file, all of the lines are the same as the localhost zonefile with exception of line 9, this is the reverse lookup (PTR) record. The zone used here is "@" again, which got set to the value given in named.conf, i.e. "127.in-addr.arpa". This is a special "domain" which is used to do reverse-lookup of IP addresses back into hostnames. For it to work, the four bytes of the IPv4 address are reserved, and the domain "in-addr.arpa" attached, so to resolve the IP address "127.0.0.1", the PTR record of "1.0.0.127.in-addr.arpa" is queried, which is what is defined in that line.
代码: 全选
1| $TTL 3600
2| @ IN SOA strider.diverge.org. root.diverge.org. (
3| 1 ; Serial
4| 8H ; Refresh
5| 2H ; Retry
6| 1W ; Expire
7| 1D) ; Minimum TTL
8| IN NS localhost.
9| 1.0.0 IN PTR localhost.