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Martin Hope
Jargo
Asked: 2024-07-26 19:17:28 +0800 CST
  • 5

我正在尝试在 debian 12 和 上安装和配置 ISC DHCP 服务器。但我在 syslog 中不断收到以下错误。

Jul 26 13:42:38 3ecc1b69 dhcpd[774]: No subnet declaration for enp2s0 (no IPv4 addresses).
Jul 26 13:42:38 3ecc1b69 dhcpd[774]: ** Ignoring requests on enp2s0.  If this is not what
Jul 26 13:42:38 3ecc1b69 dhcpd[774]:    you want, please write a subnet declaration
Jul 26 13:42:38 3ecc1b69 dhcpd[774]:    in your dhcpd.conf file for the network segment
Jul 26 13:42:38 3ecc1b69 dhcpd[774]:    to which interface enp2s0 is attached. **
Jul 26 13:42:38 3ecc1b69 dhcpd[774]: 
Jul 26 13:42:38 3ecc1b69 dhcpd[774]: 
Jul 26 13:42:38 3ecc1b69 dhcpd[774]: Not configured to listen on any interface

以下是配置文件

dhcpd配置文件

  subnet 192.168.1.0 netmask 255.255.255.0 {
        range 192.168.1.100 192.168.1.200;
        option routers 192.168.1.1;
        option domain-name-servers 192.168.1.1;
        option subnet-mask 255.255.255.0;
    }

接口

    source /etc/network/interfaces.d/*
    auto lo
    iface lo inet loopback
    
  


  allow-hotplug enp2s0
    iface enp2s0 static
        address 192.168.1.1
        netmask 255.255.255.0

isc-dhcp 服务器

INTERFACESv4="enp2s0"
INTERFACESv6="enp2s0"

尝试启动服务器会产生以下输出

    Job for isc-dhcp-server.service failed because the control process exited with error code.
    See "systemctl status isc-dhcp-server.service" and "journalctl -xeu isc-dhcp-server.service" for details.


systemctl status isc-dhcp-server.service provides this output

isc-dhcp-server.service - LSB: DHCP server
         Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
         Active: failed (Result: exit-code) since Fri 2024-07-26 16:11:23 EEST; 57s ago
           Docs: man:systemd-sysv-generator(8)
        Process: 1290 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=1/FAILURE)
            CPU: 39ms
    
    Jul 26 16:11:21 3ecc1b69 systemd[1]: Starting isc-dhcp-server.service - LSB: DHCP server...
    Jul 26 16:11:21 3ecc1b69 isc-dhcp-server[1290]: Launching IPv4 server only.
    Jul 26 16:11:23 3ecc1b69 isc-dhcp-server[1290]: Starting ISC DHCPv4 server: dhcpdcheck syslog for diagnostics. ... failed!
    Jul 26 16:11:23 3ecc1b69 isc-dhcp-server[1290]:  failed!
    Jul 26 16:11:23 3ecc1b69 systemd[1]: isc-dhcp-server.service: Control process exited, code=exited, status=1/FAILURE
    Jul 26 16:11:23 3ecc1b69 systemd[1]: isc-dhcp-server.service: Failed with result 'exit-code'.
    Jul 26 16:11:23 3ecc1b69 systemd[1]: Failed to start isc-dhcp-server.service - LSB: DHCP server.
debian
Martin Hope
Jargo
Asked: 2012-12-21 13:04:25 +0800 CST
  • 1

据我了解，Tomcat 在 Linux 上使用单独的 DNS 缓存。我怎样才能清除它？

我们的 Tomcat 服务器正在运行一个应用程序，该应用程序使用另一台服务器上的服务，该服务器的 IP 地址已更改。现在我收到noRouteToHost异常，即使在从另一台计算机测试时似乎可以使用它的 DNS 名称访问另一台服务器上的服务。此外，当使用其 DNS 名称从安装了 tomcat 的服务器对“新 IP”服务器执行 ping 操作时，ping 会执行正确的新 IP 地址。

domain-name-system