DDNS无法正常工作，求救
在配置DDNS后出现DHCP分配IP正常，而更新机器名出现错误。log的提示如下：
tail /var/log/messages
Dec 17 22:23:07 localhost dhcpd: Internet Systems Consortium DHCP Server V3.1.0
Dec 17 22:23:07 localhost dhcpd: Copyright 2004-2007 Internet Systems Consortium.
Dec 17 22:23:07 localhost dhcpd: All rights reserved.
Dec 17 22:23:07 localhost dhcpd: For info, please visit http://www.isc.org/sw/dhcp/
Dec 17 22:23:07 localhost dhcpd: Internet Systems Consortium DHCP Server V3.1.0
Dec 17 22:23:07 localhost dhcpd: Copyright 2004-2007 Internet Systems Consortium.
Dec 17 22:23:07 localhost dhcpd: All rights reserved.
Dec 17 22:23:07 localhost dhcpd: For info, please visit http://www.isc.org/sw/dhcp/
Dec 17 22:23:07 localhost dhcpd: Wrote 1 leases to leases file.
Dec 17 22:23:08 localhost dhcpd: Listening on LPF/eth0/00:0c:29:17:9a:b3/192.168.1/24
Dec 17 22:23:08 localhost dhcpd: Sending on LPF/eth0/00:0c:29:17:9a:b3/192.168.1/24
Dec 17 22:23:08 localhost dhcpd: Sending on Socket/fallback/fallback-net
Dec 17 22:23:19 localhost named[2421]: client 192.168.1.10#32770: update 'mtls.com/IN' denied
Dec 17 22:23:19 localhost dhcpd: Unable to add forward map from liushumantou.mtls.com to 192.168.1.11: timed out
Dec 17 22:23:19 localhost dhcpd: DHCPREQUEST for 192.168.1.11 from 00:50:56:c0:00:01 (liushumantou) via eth0
Dec 17 22:23:19 localhost dhcpd: DHCPACK on 192.168.1.11 to 00:50:56:c0:00:01 (liushumantou) via eth0
环境：LINUX作为DNS+DHCP服务器，ip是192.168.1.10； 上面的log中liushumantou是一台 xp client，
DNS和DHCP的相关配置文件如下： 其中DNS是以named用户运行的，dhcp是以root用户运行的。
/etc/dhcpd.conf
ddns-update-style interim;
ignore client-updates;
option domain-name "mtls.com";
option domain-name-servers ns.mtls.com;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.11 192.168.1.245;
option routers ns.mtls.com;
}
key DHCP_UPDATER {
algorithm HMAC-MD5.SIG-ALG.REG.INT;
secret O4FIgI+3JxXqDBvB0bREmw==;
};
zone mtsl.com. {
primary 127.0.0.1;
key DHCP_UPDATER;
}
zone 1.168.192.in-addr.arpa. {
primary 127.0.0.1;
key DHCP_UPDATER;
}
/etc/named.conf
options {
directory "/var/named";
};
controls {
inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};
zone "." IN {
type hint;
file "named.ca";
};
zone "localhost" IN {
type master;
file "localhost.zone";
allow-update { none; };
};
zone "0.0.127.in-addr.arpa" IN {
type master;
file "named.local";
allow-update { none; };
};
include "/etc/rndc.key";
zone "mtls.com" IN {
type master;
file "mtls.com.zone";
allow-update { key DHCP_UPDATER; };
};
zone "1.168.192.in-addr.arpa" IN {
type master;
file "1.168.192.zone";
allow-update { key DHCP_UPDATER; };
};
key DHCP_UPDATER {
algorithm HMAC-MD5.SIG-ALG.REG.INT;
secret O4FIgI+3JxXqDBvB0bREmw==;
};
