What is the difference between EC2 Security Groups and NACL?
EC2 Security Groups are stateful firewalls for instances, while NACLs (Network Access Control Lists) are stateless and apply to subnets.
Can you explain what stateful and stateless means in this context?
Sure! Stateful means that the firewall remembers the state of active connections, while stateless does not track connection states.
Which one should I use for my application?
It depends on your needs. Use Security Groups for instance-level control and NACLs for broader subnet-level rules.
Are there any limitations to using Security Groups?
Yes, Security Groups can only allow inbound traffic and can have a maximum of 60 rules per group by default.
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