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What protocol should you permit in your security group if you have an EC2 instance that you intend to access EFS?
Amazon EFS rules
| Protocol type | Protocol number | Notes |
|---|---|---|
| TCP | 6 | Allows inbound SSH access from your local computer. |
Is VPC Security Group same as EC2 Security Group?
A security group acts as a virtual firewall for your instance to control inbound and outbound traffic. If you launch an instance using the Amazon EC2 API or a command line tool and you don’t specify a security group, the instance is automatically assigned to the default security group for the VPC.
What function do security groups serve related to Amazon EC2 instance Security?
A security group acts as a virtual firewall for your EC2 instances to control incoming and outgoing traffic. Inbound rules control the incoming traffic to your instance, and outbound rules control the outgoing traffic from your instance.
Which AWS services use security groups?
The main concept to understand about an AWS Security Group is that it determines what traffic is permitted in/out of a resource on a virtual network. Services that launch EC2 instances: AWS Elastic Beanstalk….5 Answers
- Amazon RDS (Relational Database Service)
- Amazon Redshift.
- Amazon ElastiCache.
- Amazon CloudSearch.
What is default security group in AWS?
Default security groups: An AWS created default security group has one default inbound rule allowing traffic from other instances associated with the same security group. The rule enables the instances to communicate with each other without needing to go out to the internet.
Can security groups span VPCS?
The Security Group will not be visible in any other AWS Region apart from the region it is created in. The security group can then be used by any EC2 instance in the same VPC as the Security group.
At what level NACLs provide protection?
As we mentioned earlier, security groups work at the instance level while NACLs work at the subnet level. Security groups are a required form of defense for instances, because an instance must be associated with at least one security group.
How do I assign a security group to an EC2 instance?
Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/ .
- In the navigation pane, choose Instances.
- Select your instance, and then choose Actions, Security, Change security groups.
- For Associated security groups, select a security group from the list and choose Add security group.
- Choose Save.
Can an EC2 instance have multiple security groups?
You can apply multiple security groups to a single EC2 instance or apply a single security group to multiple EC2 instances. System administrators often make changes to the state of the ports; however, when multiple security groups are applied to one instance, there is a higher chance of overlapping security rules.
Can you resize an EC2 instance?
You cannot resize an instance in EC2-Classic mode to a instance type that is available only in a VPC unless you have a custom VPC. To check if your instance is in a VPC or EC2-Classic, navigate to the EC2 console and check the VPC ID value on the details pane of the Instances screen.
How are security groups used in EC2 classic?
DB security groups are used with DB instances that are not in a VPC and on the EC2-Classic platform. Each DB security group rule enables a specific source to access a DB instance that is associated with that DB security group. The source can be a range of addresses (for example, 203.0.113.0/24), or an EC2-Classic security group.
Can a VPC be assigned to a different security group?
If you launch an instance using the Amazon EC2 API or a command line tool and you don’t specify a security group, the instance is automatically assigned to the default security group for the VPC. If you launch an instance using the Amazon EC2 console, you have an option to create a new security group for the instance.
Which is the default security group for Amazon EC2?
If you launch an instance in the Amazon EC2 console, the launch instance wizard automatically defines a “launch-wizard- xx ” security group, which you can associate with the instance instead of the default security group. The following table describes the default rules for a default security group.
What kind of security group does Amazon VPC use?
(Inbound rules only) The source of the traffic and the destination port or port range. The source can be another security group, an IPv4 or IPv6 CIDR block, a single IPv4 or IPv6 address, or a prefix list ID. (Outbound rules only) The destination for the traffic and the destination port or port range.