是man -host.conf 中的
nospoof
Valid values are on and off. If set to on, the
resolv+ library will attempt to prevent hostname
spoofing to enhance the security of rlogin and rsh.
It works as follows: after performing a host
address lookup, resolv+ will perform a hostname
lookup for that address. If the two hostnames do
not match, the query will fail.
中间一句话应当怎样理解? |