What is the difference between VPC security group and EC2 security group?

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Please share your opinion as how VPC security group and EC2 security group are different from each other.
Feb 11 in AWS by Daniel Richard
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2 answers to this question.

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EC2-Classic

The original release of Amazon EC2

Your instances run in a single, flat network that you share with other customers.

EC2-VPC

The original release of Amazon VPC

Your instances run in a virtual private cloud (VPC) that's logically isolated to your AWS account.
answered Feb 11 by Shashank
• 1,350 points
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EC2-Classic Security Group

  • When the instance is launched, you are given an option only to choose a Security Group that resides in the same region as the instance.
  • You cannot change the Security Group after the instance has launched. You have an option to edit the rules.
  • They support only IPv4.

EC2-VPC Security Group

  • You can change the Security Group even after the instance has launched.
  • They are IPv6 Capable
answered Feb 11 by Ramaya

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