Select your cookie preferences

We use essential cookies and similar tools that are necessary to provide our site and services. We use performance cookies to collect anonymous statistics, so we can understand how customers use our site and make improvements. Essential cookies cannot be deactivated, but you can choose “Customize” or “Decline” to decline performance cookies.

If you agree, AWS and approved third parties will also use cookies to provide useful site features, remember your preferences, and display relevant content, including relevant advertising. To accept or decline all non-essential cookies, choose “Accept” or “Decline.” To make more detailed choices, choose “Customize.”

alb-desync-mode-check

Focus mode
alb-desync-mode-check - AWS Config

Checks if an Application Load Balancer (ALB) is configured with a user defined desync mitigation mode. The rule is NON_COMPLIANT if ALB desync mitigation mode does not match with the user defined desync mitigation mode.

Identifier: ALB_DESYNC_MODE_CHECK

Resource Types: AWS::ElasticLoadBalancingV2::LoadBalancer

Trigger type: Configuration changes

AWS Region: All supported AWS regions except Asia Pacific (Thailand), Asia Pacific (Malaysia), Mexico (Central), Canada West (Calgary) Region

Parameters:

desyncMode
Type: CSV

Comma-separated list, in which customers can choose max 2 values among - 'defensive', 'strictest', and 'monitor'.

AWS CloudFormation template

To create AWS Config managed rules with AWS CloudFormation templates, see Creating AWS Config Managed Rules With AWS CloudFormation Templates.

On this page

PrivacySite termsCookie preferences
© 2025, Amazon Web Services, Inc. or its affiliates. All rights reserved.