How often do you change your password? Within AWS is a service called Trusted Advisor. Trusted Advisor runs checks in an AWS account looking for best practices around Cost Optimization, Fault Tolerance, Performance, and Security. In the Security section, there’s a check (Business and Enterprise Support only) for the age of an Access Key attached to an IAM user. The Trusted Advisor check that will warn for any key older than 90 days and alert for any key older than 2 years.
If you’ve worked on a load balancer, then at some point you’ve been witness to the load balancer taking the blame for an application problem (like a rite of passage). This used to be difficult to exonerate, but with AWS Elastic Load Balancing you can capture Access Logs (Classic and Application only) and very quickly identify whether the load balancer contributed to the problem. Much like any log analysis, the volume of logs and frequency of access are key to identify the best log analysis solution.