DDNS+DHCP 问题?

morphling

在RH9上安装了DNS+DHCP.
DNS 是 9.2.1-16
DHCP 是 3.0p|1-23

我的/etc/named.conf:

options{
directory "/var/named";
};
zone "testing.net"{
allow-update{127.0.0.1;192.168.0.0/24;};
type master;
file "db.testing.net";
}
zone "0.168.192.in-addr-arpa"{
allow-update{127.0.0.1;192.168.0.0/24};
type master;
file "db.0.168.192";
}
zone "localhost"{
type master;
file "db.localhost";
}
zone "0.0.127.in-addr.arpa"{
type master;
file "db.0.0.127";
}

我的/etc/dhcpd.conf:

option domain-name "testing.net";
option domain-name-servers rh1.testing.net;
default-lease-time 604800;
max-lease-time 2419200;
ddns-update-style interim;

zone nwtraders.msft.{
primary 127.0.0.1;
}

zone 0.168.192.in-addr.arpa.{
primary 127.0.0.1;
}

ignore client-updates;

subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.100 192.168.0.200;
option broadcast-address 192.168.0.255;
}

但是只有Win 2000的电脑会更新DNS
但是所有的LINUX没有更新.
不知道为什么,是否LINUX是要用SCRIPT来更新的.

另外,当我看dhcpd.leases时,发现不是所有的电脑也有留下HOSTNAME.
此外,有时同一部电脑同一个IP会有数个记录.

各位可否帮帮忙.教我知是发生了什么问题?