连接：网络无法访问？- 平

Question

当我尝试 ping google 的 dns 或网络外的任何网络时，我得到了 connect: Network is unreachable什么？

我无法更新我放下的任何一个

我是网络新手……还有 Ubuntu。但这些是我认为可能有帮助的一些命令的结果

$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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 mq state UP qlen 1000
    link/ether 00:0e:7f:a9:10:54 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.5/24 brd 192.168.0.255 scope global eth0
    inet6 fe80::20e:7fff:fea9:1054/64 scope link 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN 
    link/ether 86:0b:cb:43:63:a5 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
mcserver@helloworld:~$ 

$ vi /etc/resolv.conf:
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.0.5
nameserver 8.8.8.8

$ vi /etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
        address 192.168.0.5
        netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.0.255
        post-up iptables-restore < /etc/iptables.up.rules
        dns-nameservers 192.168.0.5 8.8.8.

Answer 1

以下行是错误的：

iface eth0 inet static
    address 192.168.0.5
    netmask 255.255.255.0
    network 192.168.1.0 <<<<<<<<<<<<<<<<<<<<<<<< It should be 192.168.0.0
    broadcast 192.168.0.255
    post-up iptables-restore < /etc/iptables.up.rules
    dns-nameservers 192.168.0.5 8.8.8.8

此外，似乎没有任何默认网关设置。

没有关于您的网络的更多信息，我建议在最后添加以下行：

    gateway <YOUR.ROUTER.IP.ADDRESS>

因此，假设您的路由器 IP 地址是 192.168.0.1，这将是整个条目：

iface eth0 inet static
    address 192.168.0.5
    netmask 255.255.255.0
    network 192.168.0.0
    broadcast 192.168.0.255
    post-up iptables-restore < /etc/iptables.up.rules
    gateway 192.168.0.1
    dns-nameservers 192.168.0.5 8.8.8.8

Answer 2

问题是，您需要设置默认网关

1）取终端

2）须藤

3) 输入

$ route 添加默认 gw (eg:192.168.136.1) eth0

4）有时你可以ping（ping 8.8.8.8）但浏览器中没有互联网连接，然后

5）去'纳米/etc/resolv.conf'

6)添加

7) 名称服务器 8.8.8.8

8）名称服务器 192.168.136.0（网关）或名称服务器 127.0.1.1

9)sudo /etc/init.d/networking restart 或 service network restart