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阻止 eth0 添加默认路由

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阻止 eth0 添加默认路由

我正在寻找一种方法来防止 eth0 接口将默认路由添加到我的 Linux 计算机上的主路由表中。我有一个 Debian 发行版（Jessie - 8.0），并且正在查看/etc/network/interfaces.我当前的配置如下：

如果配置

eth0      Link encap:Ethernet  HWaddr b8:27:eb:4b:f4:9e  
          inet addr:172.16.2.82  Bcast:172.16.3.255  Mask:255.255.252.0
          inet6 addr: fe80::ba27:ebff:fe4b:f49e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2311 errors:0 dropped:0 overruns:0 frame:0
          TX packets:203 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:187402 (183.0 KiB)  TX bytes:22251 (21.7 KiB)

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:10.178.142.185  P-t-P:192.200.1.21  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:36 errors:0 dropped:0 overruns:0 frame:0
          TX packets:56 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:2918 (2.8 KiB)  TX bytes:3426 (3.3 KiB)

/etc/网络/接口

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp
post-up /sbin/route del default dev eth0

ip 路由显示表主

default dev ppp0  scope link 
default via 172.16.0.40 dev eth0  metric 202 
10.64.64.65 dev ppp1  proto kernel  scope link  src 10.181.104.9 
169.254.0.0/16 dev wlan0  proto kernel  scope link  src 169.254.23.201  metric 303 
169.254.0.0/16 dev wwan0  proto kernel  scope link  src 169.254.62.145  metric 305 
172.16.0.0/22 dev eth0  proto kernel  scope link  src 172.16.2.160  metric 202 
192.168.42.0/24 dev wlan0  proto kernel  scope link  src 192.168.42.1 
192.200.1.21 dev ppp0  proto kernel  scope link  src 10.179.96.79

遗憾的是，这种方法仅在使用 ifup eth0 启动接口时才有效，而在物理连接电缆并分配 IP 时则无效。即使如此，这种方法也不会删除默认条目，并且 ifup 会给出以下错误：

    Internet Systems Consortium DHCP Client 4.3.1
    Copyright 2004-2014 Internet Systems Consortium.
    All rights reserved.
    For info, please visit https://www.isc.org/software/dhcp/

    Listening on LPF/eth0/b8:27:eb:4b:f4:9e
    Sending on   LPF/eth0/b8:27:eb:4b:f4:9e
    Sending on   Socket/fallback
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
    DHCPREQUEST on eth0 to 255.255.255.255 port 67
    DHCPOFFER from 172.16.0.8
    DHCPACK from 172.16.0.8
    eminstBootdpxeboot.com option - discarded
    eminstBootdpxeboot.com option - discarded
    bound to 172.16.2.82 -- renewal in 12663 seconds.
    SIOCDELRT: No such process
    Failed to bring up eth0.

我想知道一种正确的方法来确保默认路由不通过 eth0 添加不是必须使用ifup（以利用 post-up）手动启动 eth0，而是使用启动时已初始化的 eth0。

答案1

编辑/etc/dhcp/dhclient.conf并routers从request语句中删除，以便您的 DHCP 客户端不会在请求地址的同时请求默认路由配置。

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