What is NACL?
Network Access Control List is also a virtual firewall for subnets, which controls the Inbound and Outbound traffic of Subnets. After the creation of VPC, a Default NACL will be associated and allow all Inbound and Outbound Traffic.
In NACL just like Security Groups, it contains set of Inbound and Outbound Rules , that can either allow or deny Traffic into or out of subnets. Since we have option to allow or deny traffic the order of the rules becomes important so that AWS uses a concept of rule number.
NACL- Inbound
NACL- Outbound
Amazon Web Services – Security Group vs NACL
Security groups and NACL both act as virtual firewalls which control the traffic from Inbound and Outbound of the resources. In this article, we will discuss the difference between Security Groups and NACL on Amazon Web Services.