AWS Firewalls — NACLs and Security Groups
Some Real World Tips
AWS Firewalling can be confusing as you are offered two different tools, which are as different as night and day. Most AWS practitioners only use one of these two tools (Security Groups) and largely ignore the second one (NACLs). This post will highlight some key differences and also argue that you should be using BOTH — NACLs and Security groups — in conjunction.