Yes, all of our AWS EC2 Windows instances sitting behind an ELB with the latest AWS Security Protocols will not communicate with the ELB after this update. I w

Yes, all of our AWS EC2 Windows instances sitting behind an ELB with the latest AWS Security Protocols will not communicate with the ELB after this update. I was able to fix this by reconfiguring the available cipher suites within IIS. Downloaded the IIS Crypto tool https://www.nartac.com/Products/IISCrypto/Default.aspx https://www.nartac.com/Products/IISCrypto/Default.aspx and applied their "Best Practices" which removed a bunch of insecure ciphers. After that the AWS ELB and IIS happily communicated.