Network Topology Use-Case

Topology where A can Ping to B and C both , But B & C not Able to ping each other

Objective:- 🔰 14.1 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.

For this we need to have 3 O.S. with proper network connectivity .

here We are using 3 Amazon linux os over AWS cloud .

for me IPs of systems

1. A-> 172.31.6.95
2. B-> 172.31.2.141
3. C-> 172.31.14.153

Here our systems are able to connect to each other .

Now we want that B and C should not be able to ping to each other .

For this we have 2 Methods Either we can remove all route rules from all the os and just add particular ips of os we want to ping . Or we can just make a change in B or C OS of declining(rejecting ) ping .

Here I’m going for second one. What we need to do is , we need to run this command in 2nd os

route add -host 172.31.14.153 reject

now try to ping Both A and C from this os . It will Decline to c but ping to A

A has proper connectivity to both of other os

And C also able to ping A but not to B.

That’s all with this article. I hope you found this post informative .Feel Free to provide Suggestions in comment section or LinkedIn .

Aman Goyal - Student Intern and Technical volunteer - LinuxWorld Informatics Pvt Ltd | LinkedIn

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