我有一个DHCP服务安装在我的发行版，Backtrack 5 R2（Ubuntu 10.04），它工作正常，但是当我开始configurationDNS时，它突然停住了工作，我怎么能使它再次工作？
dhcp.conf文件：
ddns-update-style none; option domain-name "admin.servers.net"; option domain-name-servers ns1.example.org, ns2.example.org; default-lease-time 600; max-lease-time 7200; authoritative; log-facility local7; subnet 192.168.0.0 netmask 255.255.255.0 { range 192.168.0.50 192.168.0.100; option domain-name-servers 192.168.0.2, 8.8.4.4; option routers 192.168.0.254; option broadcast-address 192.168.0.255; default-lease-time 600; max-lease-time 7200; } 当我重新启动服务时，显示：
Internet Systems Consortium DHCP Server V3.1.3 Copyright 2004-2009 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Wrote 4 leases to leases file. No subnet declaration for restart (0.0.0.0). ** Ignoring requests on restart. If this is not what you want, please write a subnet declaration in your dhcpd.conf file for the network segment to which interface restart is attached. ** Not configured to listen on any interfaces!
dhcp3-server有：
INTERFACES="eth0"
IP地址：
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 04:7d:7b:15:29:6b brd ff:ff:ff:ff:ff:ff inet 192.168.0.2/24 brd 192.168.0.255 scope global eth0 inet6 fe80::67d:7bff:fe15:296b/64 scope link valid_lft forever preferred_lft forever 3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000 link/ether 74:e5:0b:57:b4:82 brd ff:ff:ff:ff:ff:ff
ip路由：
default via 192.168.0.254 dev eth0 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.8
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 04:7d:7b:15:29:6b brd ff:ff:ff:ff:ff:ff
您目前没有分配给eth0的地址。 当DHCP守护程序启动时，它会尝试检测所有存在的子网。 由于您没有分配地址，因此无法检测到任何内容，并且做错了事情。 为该接口分配一个地址。 您必须在要成为DHCP服务器的接口上拥有有效的IP地址。