I have two EC2 instances within two VPCs.
so the original NACL of a public subnet with instance 2 associated with is something like :
All ICMP - 10.0.0.0/0 ALLOW
and I can ping instance 2 from instance 1(10.1.0.71).
when I changed NACL to below, I expect I can still ping instance 2 from 1 but ended with timeout.
All ICMP - 10.0.0.0/13 ALLOW
What is happening?