Linux environment, two different network segments of the machine interoperability

The environment is as follows:

Host1 single NIC Eth0 172.24.100.15/16

Host2 dual nic eth0 172.24.100.14/16 eth1 192.168.122.214/24

Host3 single NIC Eth0 192.168.122.215/24

The entire environment such as:

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Requirements: Let host1 and HOST3 interoperability, that is, host1 can ping host3,host3 can ping through host1

Solve:

First, on the HOST2, ensure that you can ping host1 and host3 at the same time

Second, on the host1, add the following route

Route add default GW 172.24.100.14 #添加默认网关路由 to ensure that requests from host1 to 192.168.122.0/24 network segment arrive first Host2

Third, on the HOST2, add the following route

Route add-net 172.24.0.0 netmask 255.255.0.0 dev eth0 #添加路由, actually refers to the road, designated to the 172.24.0.0/16 network segment to go to the request through the ETH0 network card out of the route ad D-net 192.168.122.0 netmask 255.255.255.0 dev eth1 #添加路由, specify the request to the 192.168.122.0/24 network segment to go out with the ETH1 network card

Four, or on the Host2, turn on route forwarding as follows

Echo 1 >/proc/sys/net/ipv4/ip_forward

Five, on Host3, add the following route

Route add default GW 192.168.122.214 #添加默认网关路由 to ensure that requests from HOST3 to 172.24.0.0/16 network segment arrive first Host2

It's amazing how you can ping each other.

Linux environment, two different network segments of the machine interoperability