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自定义环回接口在不同机器上的可达性

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自定义环回接口在不同机器上的可达性

我在一台具有特定 IP 地址的计算机上有一个环回接口，在另一台计算机上有一条到该环回接口子网的静态路由。

使用直连接口时，可以 ping 通另一个环回接口。但是，当我使用该-I标志从另一个接口 ping 时，它不再起作用。

它似乎与路线的范围有关，link而不是host，但我不确定如何改变它。

这是具有环回接口的远程主机的配置：

user@remote:~$ ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet 77.77.77.77/24 brd 77.77.77.255 scope global lo:10
       valid_lft forever preferred_lft forever
    inet 66.66.66.66/24 brd 66.66.66.255 scope global lo:11
       valid_lft forever preferred_lft forever
    inet 145.52.150.1/24 brd 145.52.150.255 scope global lo:12
       valid_lft forever preferred_lft forever
    inet 5.16.0.1/24 brd 5.16.0.255 scope global lo:13
       valid_lft forever preferred_lft forever
    inet 176.111.208.1/24 brd 176.111.208.255 scope global lo:14
       valid_lft forever preferred_lft forever
    inet 185.10.172.1/24 brd 185.10.172.255 scope global lo:15
       valid_lft forever preferred_lft forever
    inet 189.199.123.1/24 brd 189.199.123.255 scope global lo:16
       valid_lft forever preferred_lft forever
    inet 165.254.255.133/24 brd 165.254.255.255 scope global lo:17
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:e5:17:a0 brd ff:ff:ff:ff:ff:ff
    inet 10.88.1.2/24 brd 10.88.1.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fee5:17a0/64 scope link 
       valid_lft forever preferred_lft forever

user@remote:~$ ip route
default via 10.88.1.1 dev enp0s3 
10.88.0.0/24 dev enp0s3 scope link 
10.88.1.0/24 dev enp0s3 proto kernel scope link src 10.88.1.2

这是具有静态路由的本地计算机：

user@local:~$ ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:1a:aa:71 brd ff:ff:ff:ff:ff:ff
    inet 10.88.0.1/24 brd 10.88.0.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe1a:aa71/64 scope link 
       valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:81:d8:21 brd ff:ff:ff:ff:ff:ff
    inet 10.88.1.1/24 brd 10.88.1.255 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe81:d821/64 scope link 
       valid_lft forever preferred_lft forever

user@local:~$ ip route
default via 192.168.1.1 dev enp0s9 
5.16.0.0/24 dev enp0s8 scope link 
8.8.8.0/24 dev enp0s8 scope link 
10.88.0.0/24 dev enp0s3 proto kernel scope link src 10.88.0.1 
10.88.1.0/24 dev enp0s8 proto kernel scope link src 10.88.1.1 
66.66.66.0/24 dev enp0s8 scope link 
77.77.77.0/24 via 10.88.1.2 dev enp0s8 
145.52.150.0/24 dev enp0s8 scope link 
169.254.0.0/16 dev enp0s3 scope link metric 1000 
176.111.208.0/24 dev enp0s8 scope link 
185.10.172.0/24 dev enp0s8 scope link 
192.168.1.0/24 dev enp0s9 proto kernel scope link src 192.168.1.110 
198.199.123.0/24 dev enp0s8 scope link

该命令挂起：

user@detector:~$ ping -I enp0s3 77.77.77.77
PING 77.77.77.77 (77.77.77.77) from 10.88.0.1 enp0s3: 56(84) bytes of data.

答案1

根据定义，环回接口只能从本地主机访问。您确定您有到远程环回接口的静态路由吗？或者您是否真的可以 ping 本地主机上的环回？

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