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Setting up your IAM Securely on AWS – ls / blog

To secure your AWS assets, follow these AWS Identity and Access Management (IAM) guidelines.

Locking the Root User Access Key for AWSAccount

You use an access key (access key ID and secret access key) to make software requests to AWS. However, do not use the root access key for your AWS account. The access key for your AWS root user account gives you full access to all your resources for all AWS services, including your billing information. You cannot reduce the rights attached to your AWS account using the user’s root access key.

So protect the access key for root users, as well as credit card numbers or other secrets. Here are some ways to do this:

  • If you don’t already have an access key for your AWS root user account, don’t create one if you absolutely must have one. Instead, use your email address and account password to login to the AWS Management Console and create an IAM user with administrator privileges.
  • If you have an access key for your AWS root user account, delete it. If you want to save it, turn (change) the access key regularly. To delete or rotate the root access codes, go to the My Security Information page.
  • in the AWS Management Console and log in with your email address and account password. You can manage the access keys in section of the access key . For more information on turning the access keys, see Turning Access Keys.
  • Never reveal the main user’s password or access keys to your AWS account. The other parts of this document discuss ways to avoid having to share your AWS root user accounts with other users and not integrate them into the application.
  • Use a strong password to secure access to the AWS management console at account level To manage the AWS account root user password, see Changing the AWS account root user password.
  • Enable AWS Multifactor Authentication (MFA) on your AWS root user account. For more information, see Using Multifactor Authentication (AMF) in AOIs.

Create individual users IAM

Do not use root user credentials to access AWS, and do not give your credentials to others. Instead, create individual users for everyone who needs access to your AWS account. Create an IAM user for yourself, give this user administrative rights and use this IAM user for all your work. For more information about the procedure, see Creating the first IAM User and Administrator Group.

By creating individual IAM users for people who have access to your account, you can provide each IAM user with a unique set of security information. You can also give each IAM user different rights. If necessary, you can change or revoke the authorizations to use AIM at any time. (If you provide user data to root, it may be difficult to revoke it and it is impossible to restrict their privileges).


However, please read the following article on groups before defining authorizations for individual AIM users.

Using groups to assign authorizations to IAM users

Instead of defining rights for individual AIM users, it is usually more convenient to create groups related to professional functions (administrators, developers, accounting, etc.). Then define the appropriate authorisations for each group. Finally, assign AMI users to these groups. All users in the IAM group inherit the rights granted to this group. This allows you to make changes for all group members in one place. If your company’s employees move, you can easily change the IAM group to which your IAM user belongs.

Below you will find more information:

Setting up your IAM Securely on AWS – ls / blog

Lower privileges

When drawing up an AIM policy, follow the standard security tips to grant as few rights as possible or only those rights that are necessary to perform the task. Define what users (and roles) should do, and then create a policy that allows them to perform only those tasks.

Start with a minimum of authorisations and give extra authorisations if necessary. It’s safer than starting with permits that are too soft and then trying to tighten them up.

You can use access layer groups to understand the access layer provided by the policy. The political actions are classified as follows: writing, reading, management of
permissions or marking. For example, you can select actions from a list and read-only access levels to grant read-only access to users. For information on the use of policy summaries to understand access rights to access levels, see Using Access Levels to Check IAM Rights.

One of the features that can help is the latest access data to the service. You can view this information at node Access Advisor on the Users, Groups, Roles or Policies page of the IAM Console. If you are logged in with your AWS Organization Master Account data, you can view this data in AWS AWS Organization section of the IAM console. You can also use the AWS CLI or AWS API to report the latest service data available to organizations or policies in the MRI or within organizations. You may use this information to identify unnecessary privileges in order to improve your MEI or your organisation’s policies for better compliance with the Least Privilege Principle. For more information, see Clarifying authorizations using data received during the last service access.


To further reduce permissions, you can view your account events in the AWS CloudTrail Event History. CloudTrail event logs provide detailed event information that you can use to reduce political privileges. The magazines contain only the actions and resources your AIM structures need. For more information, see the View CloudTrail Events section in the CloudTrail Console section of the AWS CloudTrail User Guide.

Below you will find more information:

  • Access control
  • Service-specific policy issues that provide examples of service-specific resource policies. Examples :

Setting up your IAM Securely on AWS – ls / blog

Start of use of authorisations with AWS managed policies

In order to give your employees only the necessary permits, time is needed and a thorough knowledge of the IAM guidelines is required. Employees need time to find out which AWS services they want or need to use. Administrators need time to study and test the AMI.

For a quick start you can use AWS-managed policies to give your employees the rights they need to get started. These rules are already available on your account and are maintained and updated by AWS. For more information on the AWS management policy, see AWS management policy.

The policies managed by AWS are designed to provide authorizations for many common cases. SSO management policy with full access like AmazonDynamoDBFullAccess

and IAMFullAccess define permissions for service administrators that allow full access to the service. AWS policy management for electricity consumers, such as B. AWSCodeCommitPowerUser and AWSKeyManagementServicePowerUser, provide multi-level access to AWS services without authorization management. Partial access policies managed by ABC, such as AmazonMobileAnalyticsWriteOnlyAccess and AmazonEC2ReadOnlyAccess.

provide specific levels of access to IOA services. AWS Policy Management makes it easier to assign the right rights to users, groups and roles than if you had to write the policies yourself.

AWS-managed workplace function policies can cover multiple departments and be consistent with common workplace functions in the IT industry. For a list and description of the job policies, see AWS Managed Job Function Policies.

Use of customer-managed policies instead of Internet policies

For tailor-made policies, we recommend the use of managed policies instead of integrated policies. The main advantage of using these policies is that you can view all managed policies in one place in the console. You can also display this information using a single AWS CLI or AWS API operation. Network policy is policy that exists only to identify the IAM (user, group or role). Managed policies are individual IAM resources that you can allocate to multiple people. For more information, see the sections Internet Management Policies and Guidelines.

If your account has built-in policies, you can turn them into manageable policies. To do so, copy the policy into the new managed policy and add the new policy to an identity with an integrated policy. Secondly, integrated policies should be abolished. You can do this by following the instructions below.


  1. .
  2. In the navigation bar, select Groups, Usersor Roles.
  3. Select from the list the name of the group, user or role you want to delete.
  4. Select the tab Authorizations . If you have selected Groups, expand Online Policies if needed.
  5. For groups , select Display Policy next to the policy line you want to delete. For users and roles, select Display n above, if necessary, and then select the arrow next to the policy you want to delete.
  6. Copy the JSON policy document.
  7. In the navigation section, select Policy.
  8. Select Create Policy and then select the JSON tab.
  9. Replace the existing text with the text of your JSON policy and select Policy Overview.
  10. Enter a name for your policy and select Create Policy.
  11. In the navigation bar, select Group, User, or Roleand select the group name, user or role you want to delete again.
  12. For groups , select Apply Guideline. For users and roles, select Add rights.
  13. For groups, check the name of your new policy and select Policy Appendix. For users or roles, select Add rights. On the next page, select Direct Attachment to Existing Policy, check the name of your new policy and then select Next:. Then browse and select PermissionsAdd.

You will return to page Summary for your group, user or role.

  1. For groups , select Delete Policy next to the current policy you want to delete. For users or roles, select X next to the policy you want to delete.

In some cases, we advise you to opt for an integrated rather than a managed policy. For more details, see Choosing between Managed Policies and Internet Policies.

Setting up your IAM Securely on AWS – ls / blog

Access levels for the RIAUser Authorization Control

To make your AWS account more secure, you should regularly review and monitor your AIM policy. Make sure that your policy provides as few privileges as possible so that only the required actions are performed.

As you browse through the policy, you can view a summary of the policy, which includes a summary of the access level for each service in the policy. The AWS classifies each service action into one of five access levels, depending on what each action does Write, Read, Write, Authorization Control or Tag. You can use these access levels to determine which actions you want to include in your policy.

For example, you can allow a large group of users to access lists and read actions in the Amazon S3 service. These actions allow these users to create a list of buckets and receive items on Amazon S3. However, you only need to give a small group of users access to Amazon S3 write actions to remove buckets or place items in an S3 bucket. In addition, you need to reduce the permissions so that only administrators have access to administrative actions for Amazon S3 permissions. For example, only a limited number of people can manage the bucket policy on the Amazon S3. This is particularly important for authorisation management measures in IAM departments and AWS organisations. Permission tagging gives the user the right to perform actions that change the tags only for the source. Certain write actions, such as B. However, CreateRole allows you to select a resource when you create a resource or change other attributes of the resource. Thus, denying access to marking activities does not prevent the user from marking resources. For details and examples of the classification of access levels, see the Summary of Access Levels in the Policy Summary.

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To view the classification of access levels associated with each action in a service, see Actions, Tools and Status Buttons for AWS Services.

To view the policy’s access levels, you must first find a brief description of the policy. For general policy information, see page Policy for Administered Policies and page Users for User Policies. For more information, see the policy summary (list of services).

In the policy summary, column access level shows that policy provides full or restricted access to one or more of the four AWS access levels for the service. On the other hand, it may indicate that policy Full gives access to all activities of the service. You can use the information in this column Access Level to understand the access level provided by the policy. You can then take steps to make your AWS account more secure. For details and examples of the classification of access levels, see the Summary of Access Levels in the Policy Summary.

Set a strong password policy for your users

If you allow users to change their own passwords, you require them to create strong passwords and change them regularly. In the account settings.

On the IAM console page, you can create a password policy for your account. You can use a password policy to define the password requirements, such as B. Minimum length, whether a non-alphabetic character is needed, how often it should be rotated, and so on.

For more information, see Setting Account Password Policies for AIM Users.

Turn on the AMF.

For extra security, we recommend that you require multi-factor authentication (AMF) for all users of your account. With the MFA, users have a device that generates a response to an authentication call. In order to complete the login process, both the user identification data and the response generated by the device are required. If the user’s password or access keys are compromised, your account resources remain protected as a result of an additional authentication requirement.

The response is generated in one of the following ways:

  • Virtual and hardware AMF devices generate a code that you display in your application or device and then enter it on the login screen.
  • The U2F safety buttons generate a response when you touch the device. The user does not enter the code manually on the login screen.

For privileged MMI users authorized to access sensitive resources or API operations, we recommend the use of U2F or hardware MFA devices.

For more information about AMF, see Using Multifactor Authentication (AMF) in AOI.

To configure secure access to the AMF API for access keys, see Configuring secure access to the AMF API.

The use of rollers for applications running on Amazon EC2

Applications running on an Amazon EC2 instance require credentials to access other AWS services. Use the AIM rollers to provide safe references. A role is an entity that has its own set of authorizations, but is not a user or group. Roles also do not have their own set of permanent references, as is the case for AIM users. In the case of Amazon EC2, IAM dynamically creates temporary references to the EC2 instance, and these references are automatically rotated for you.


When you run the EC2 instance, you can specify a role for this instance as the start parameter. Applications running on an EC2 instance can use role identifiers to access AWS resources. Role authorizations determine what a request can do.

For more information, see Using the AIM Roller to Authorize Applications for Amazon EC2 Substances.

Setting up your IAM Securely on AWS – ls / blog

Use of roles to delegate authorisations

Do not share security information between accounts so that users of another AWS account can access the resources in your AWS account. Use IAM rolls instead. You can define a role that determines which privilege sets are allowed to AIM users in another account. You can also specify which AWS accounts AIM users can play this role. To find out if the person responsible for accounts outside your trusted zone (trusted organization, OR or account) has access to your roles, see What is the AIM Access Analyzer?

For more information, see the section Role Concepts and Conditions.

Undivided access keys

Access codes allow programmatic access to the OPS. Do not embed access keys in unencrypted code and do not share these security references in your AWS account with other users. For applications requiring AWS access, configure the program to obtain temporary security references using the IAM roll. To grant your users individual access to the software, create an IAM user with personal access keys.

For more information, see Switching to the IAM Role (AWS API) and Managing Access Codes for IAM Users.

Rotational potential Regular

Change your own passwords and access keys regularly and make sure all AIM users in your account do the same. For example, if a password or access key is compromised without your knowledge, limit the amount of time references can be used to access your resources. You can apply a password policy to your account to require all AIM users to change their passwords. They can also choose the frequency of this operation.

For more information on setting up a password policy for your account, see Setting up a Password Policy for AIM Users.

For more information about AIM users, see the section on Rotary Access Codes.

Erasing unwanted data

Delete unnecessary IAM user accounts (passwords and access keys). If you z. B. If you have created an IAM user for an application that does not use the console, the IAM user does not need a password. In the same way, if the user only uses the console, remove his or her access keys. Passwords and access keys that have not been used recently can be good candidates for deregistration. Unused passwords or access keys can be found via the console, CLI or API, or by downloading the identification report.


For more information on finding IAM user accounts that have not been used recently, see Finding Unused Logins.

For more information on deleting passwords for an IAM user, see Maintenance of IAM User Passwords.

For more information on deactivating or deleting access keys for an IAM user, see Access Key Management for IAM Users.

For more information on AIM identification reports, see Retrieve Identification Reports for your AWS account.

Conditions of use for extra safety

If possible, determine the conditions under which your AIM policy allows access to the resource. For example, you can write down the requirements for specifying the range of allowed IP addresses from which the request must originate. You can also indicate that the query is only allowed within the specified period or date. You can also define conditions that require SSL or AMF (multi-factor authentication). For example, you can ask a user to authenticate with an MFA device so that they can complete the Amazon EC2 instance.

For more information, see the JSON IAM Policy Elements : Conditions in the AIM link to policy elements.

Monitoring activity in your AWS account

You can use AWS’s logging features to determine what users are doing in your account and what resources have been used. Log files show the time and date of the action, the source IP of the action that could not be executed due to insufficient permissions, and much more.

Logging functions are available in the following AWS services:

  • – Registration requests from users receiving CloudFront See the Access Protocols section of the Amazon CloudFront Developer Guide for more information.
  • AWS cloud trail
  • – Records AWS API calls and related events made by or on behalf of an AWS account. For more information, see the AWS CloudTrail User Manual.
  • Amazon cloudWatch
  • – Monitor your AWS cloud resources and the applications you run on AWS. CloudWatch allows you to define alerts based on predefined parameters. See the Amazon CloudWatch User Guide for more information.
  • AWS configuration
  • – Provides detailed historical information about the configuration of your AWS resources, including users, groups, roles and policies of the IAM. For example, you can use AWS Config to define the authorizations that belong to a user or group at any given time. For more information, see the AWS Config Developer’s Guide.
  • Amazon simple storage service (Amazon S3)
  • – Amazon S3 Bucket Request Logs. For more information, see the Connecting to the Server section of the Amazon Simple Storage Service Developer’s Guide.

Video presentation of AIM Best Practices

The following video contains a presentation of the conference that discusses these good practices and gives more details about working with the elements discussed here.

Full article :

Setting up your IAM Securely on AWS – ls / blog

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