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我该如何修复“没有重新启动的子网声明（0.0.0.0）”？

tag-icon • tag-icon linux dhcp dhcp-server
我该如何修复“没有重新启动的子网声明（0.0.0.0）”？

我的发行版 Backtrack 5 R2（ubuntu 10.04）上安装了 DHCP 服务，并且它运行良好，但是当我开始配置 DNS 时它突然停止工作，我该如何让它再次工作？？

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，它显示：

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 具有：

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

答案1

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

您当前没有为 eth0 分配地址。DHCP 守护进程启动时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，并且正在做错误的事情。为该接口分配一个地址。您必须在即将成为 DHCP 服务器的接口上拥有有效的 IP。

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