Security Group vs NACL

Security Group vs NACL

 

Your VPC has a default security group with the following rules:

  1. Allow inbound traffic from instances assigned to the same security group.
  2. Allow all outbound IPv4 traffic and IPv6 traffic if you have allocated an IPv6 CIDR block.

Your VPC has a default network ACL with the following rules:

  1. Allows all inbound and outbound IPv4 traffic and, if applicable, IPv6 traffic.
  2. Each network ACL also includes a non modifiable and non removable rule whose rule number is an asterisk. This rule ensures that if a packet doesn’t match any of the other numbered rules, it’s denied.

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