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Create a Security Group Using the SDK for .NET

Create a security group, which acts as a virtual firewall that controls the network traffic for one or more

EC2 instances. By default, Amazon EC2 associates your instances with a security group that allows no

inbound traffic.You can create a security group that allows your EC2 instances to accept certain traffic.

For example, if you need to connect to an EC2 Windows instance, you must configure the security group

to allow RDP traffic.You can create a security group using the Amazon EC2 console or the SDK for .NET.

You create a security group for use in either EC2-Classic or EC2-VPC. For more information about EC2-

Classic and EC2-VPC, see Supported Platforms in the Amazon Elastic Compute Cloud User Guide for

Microsoft Windows.

Alternatively, you can create a security group using the Amazon EC2 console. For more information, see

Amazon EC2 Security Groups in the Amazon Elastic Compute Cloud User Guide for Microsoft Windows.

Contents

• Enumerating Your Security Groups (p. 37)

• Creating a Security Group (p. 38)

• Adding Rules to Your Security Group (p. 39)

Enumerating Your Security Groups

You can enumerate your security groups and check whether a particular security group exists.

To enumerate your security groups

Get the complete list of your security groups using DescribeSecurityGroups with no parameters. The

following example checks each security group to see whether its name is my-sample-sg.

string secGroupName = "my-sample-sg";

SecurityGroup mySG = null;

var dsgRequest = new DescribeSecurityGroupsRequest();

var dsgResponse = ec2Client.DescribeSecurityGroups(dsgRequest);

List<SecurityGroup> mySGs = dsgResponse.SecurityGroups;

foreach (SecurityGroup item in mySGs)

{

Console.WriteLine("Existing security group: " + item.GroupId);

if (item.GroupName == secGroupName)

{

mySG = item;

}

To enumerate your security groups for a VPC

To enumerate the security groups for a particular VPC, use DescribeSecurityGroups with a filter.The

following example checks each security group for a security group with the name my-sample-sg-vpc.

string secGroupName = "my-sample-sg-vpc";

SecurityGroup mySG = null;

string vpcID = "vpc-f1663d98";

Filter vpcFilter = new Filter

Version v2.0.0

AWS SDK for .NET Developer Guide

Create a Security Group

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