Task:: Create a network Topology Setup in such a way so that System A can ping to two Systems System B and System C but both these systems should not be pinging each other without using any security rule e.g firewall etc .
We have initial environment as shown in pictures
We manually assign the ips to System A , B and C as 192.168.1.1 ,192.168.1.2, 192.168.1.3 as shown in below pictures . We can clearly see the routing table of each Systems as shown below
For System A
For System B
For System C
We have to create the rules in the routing tables in every systems to achieve the given task situation
Adding a rule in the routing table of system A.
Adding a rule in the routing table of system B.
Adding a rule in the routing table of system C.
After all setup we can see System A can ping System B and System C
We can see System B and C can ping to System A
We can check even System B can’t ping to System C and vice versa
System A is pinging system B and system C successfully. Whereas system B & system C unable to ping each other.
By setting the netmask as 255.255.255.252 for system A, it can ping 4 IPs in its range. We changed the IPs such that system B & system C come under the network of system A, but system B & system C do not belong to the same network as their netmask is set to 255.255.255.254 their network contains only 2 IPs.