Gateway setup in linux

For more information, see <G id = "1"> linux Enterprise Application </G> <G id = "2"> Linux server application </G>. Today, I did a hypothesis experiment on gateways in linux. The experiment principle is very simple, and the process is like this.

I have three virtual machines, all of which are enabled. The network is set to host-only (vmware). One is used as a gateway and connects two VLANs. Each vlan includes one virtual machine, the details are as follows:

Eth0: 192.168.254.2 netmask: 255.255.255.128 HOST 1
Eth1: 192.168.254.136 netmask 255.255.255.128 host 2

Eth3: 192.168.254.4 eth4: 192.168.254.131 netmask are both zookeeper 255.128 host 3

In the above circumstances, use the service iptables stop command under the root user to stop the firewalls of each host, and then use

Route add-net 192.168.254.128 netmask 255.255.255.128 gw 192.168.254.4

To create a route, remember to set netmask correctly. Otherwise, it will fail.

Similarly, it is created on host 2.

Route add-net 192.168.254.0 netmask 255.255.255.128 gw 192.168.254.131

Create a route

Enable the data packet forwarding service on host 3.

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

Complete

Note: ping is successful only when the entire network is correctly set.