DEV Community

Cover image for Network Topology setup using Routing Table
Nitesh Thapliyal
Nitesh Thapliyal

Posted on

Network Topology setup using Routing Table

Hello everyone,

In this blog, we will be demonstrating the working of network topology.

In this demonstration I have 3 system:

  • A -> with IP 192.168.0.105
  • B -> with IP 192.168.0.104
  • C -> with IP 192.168.0.106

Now let's check if A is able to ping to B and C

In order to ping use the command ping

Alt Text

Here you can see A is able to ping B and C.

Now let's check if B camping A and C

Alt Text

Here you can see B can ping A and C.

Now let's check if C can ping A and B

Alt Text

Here we can see C can ping A and B.

Now add the routing rule in B such that it will not be able to connect to C

In order to reject or block the C system, IP use the command route add -host reject

Alt Text

Here you can see we have blocked or rejected C system IP.

In the same way add the routing rule in C such that it can not connect to A system IP.

Alt Text

Here you can see we have rejected the IP of the B system

Now check if B is able to ping A and C

Alt Text

Here you can see B is able to ping to A but is not able to ping C, it gives output no route to host.

Now check if C is able to ping A and B

Alt Text

Here you can see C is able to ping to A but not to B

Now check for A is it able to ping B and C

Alt Text

Here you can see A can connect to both B and C

So that how we can create 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 .

Thank you!!❄

Top comments (0)