Network Topology Setup

System A can ping to System B and System C but both (System B & C) should not be pinging each other.

using Routing Table Concept

All setup is done inside RedHat 8 Linux OS.

System A

Change IP

ifconfig enp0s3 192.168.43.1

Add routing table rule.

route add -net 192.168.43.0 netmask 255.255.255.0 gw 192.168.43.1 enp0s3

System B

Change IP

ifconfig enp0s3 192.168.43.5

Add routing table rule.

route add -net 192.168.43.0 netmask 255.255.255.252 gw 192.168.43.5 enp0s3

System C

Change IP

ifconfig enp0s3 192.168.43.9

Add routing table rule.

route add -net 192.168.43.0 netmask 255.255.255.252 gw 192.168.43.9 enp0s3