Network Topology Setup without using any security rule

A Network Topology is the arrangement with which computer systems or network devices are connected to each other. Topologies may define both physical and logical aspect of the network. Both logical and physical topologies could be same or different in a same network.

A network topology diagram helps visualize the communicating devices, which are modeled as nodes, and the connections between the devices, which are modeled as links between the nodes.

LET’S PROCEED TO THE TASK :

‍TASK DESCRIPTION :

🔰 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.

Prerequisite:

→ 3 Virtual Machine

The IP address of three systems:

System A has IP: 192.168.1.6

System B has IP: 192.168.1.7

System C has IP: 192.168.1.8

To see the routing table, use the below command:

Delete all the rules from System B and C :

Now From System B, we are going to delete all the rows from the route table. Similarly in system C.

Deleting Rule in System B

After deleting- routing table

System B

Now we need to add System A IP in System B

Adding a new row in the route table of System B with respect to System A.

Adding an IP Address of System A in System B routing table

Output

Let’s ping the System.

Now try to ping system A and system C

pinging to system A

Now, from System B, we are trying to ping to System C, but we aren’t able to ping as we haven’t added the IP addresses of System C

pinging to system C

SYSTEM C

Adding a new row in the route table of System C with respect to System A

Adding an IP Address of System A in System C routing table

Output:

Now, from System C, we are trying to ping to System B and System A. We can ping system A but we aren’t able to ping B

pinging to system A

pinging to system B

SYSTEM A

Output

Let’s ping the System

Here you can see System A can ping to System B as well as to System C

pinging to system B

pinging to system C

We have successfully created a Network Topology Setup in such a way that System A can ping to two Systems, System B and System C but both these systems aren’t able to ping each other. We did not use firewall or any other third party software to achieve this. By using this concept of maintaining route table there are many use cases that can be solved.

I hope you got an idea on Network Topology

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