Creating a setup so that you can ping Google but not Facebook at the same time.
For this specific Task I am using RHEL8, First Configure it. After Ping google.com and facebook.com from your local system. you will be able to ping both using commands #ping -4 google.com, #ping -4 facebook.com.
Next you have to see your routing table by the command #route -n
Delete existing routing table so that you can configure new one #route del -net 0.0.0.0
Ping both google and Facebook, it shows network is unreachable.
use nslookup google.com for finding the ip address of google.
Add the new routing table by the command #route add -net <IP address of google> netmask <address> gw <gateway of system> <ethernet card name>
Now use #ping -4 google.com, google is pingable.
#ping -4 facebook.com, It is still unreachable.
Now task is completed.
Thanks for reading.