See explanation below. Explanation Part 1 answer: Check on the following: AppServ1 is only using TLS.1.2 AppServ4 is only using TLS.1.2 AppServ1 is using Apache 2.4.18 or greater AppServ3 is using Apache 2.4.18 or greater AppServ4 is using Apache 2.4.18 or greater Part 2 answer: Recommendation: Recommendation is to disable TLS v1.1 on AppServ2 and AppServ3. Also upgrade AppServ2 Apache to version 2.4.48 from its current version of 2.3.48