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Network ACLs

  • uses for subnets
  • You can, for example:
    • allow only https traffic, you need to do in for in and out traffic
  • It checks a packet before packet can enter into a subnet/exit from a subnet by indicating who sent the packet and how the packet is trying to communicate with the resources in a subnet.
  • Network ACLs is stateless
  • ACL check request response too because it doesn't remember state.
  • By default:  -  default network ACL allows all inbound and outbound traffic  - custom network ACL denies all inbound and outbound traffic

References

  1. https://explore.skillbuilder.aws/learn/course/external/view/elearning/1851/aws-technical-essentials?da=sec&sec=prep Module 3
  2. AWS user guide: Control Traffic to Subnets Using Network ACLs(opens in a new tab)