AWS Security ChangesHomeSearch

AWS opensearch-service high security documentation change

Service: opensearch-service · 2026-05-22 · Security-related high

File: opensearch-service/latest/developerguide/managedomains-cloudwatchmetrics.md

Summary

Added TLSNegotiationError metric documentation for monitoring failed TLS handshakes

Security assessment

Documents new security monitoring capability for detecting TLS misconfigurations/attacks. Directly addresses potential security weaknesses by enabling detection of insecure connection attempts.

Diff

diff --git a/opensearch-service/latest/developerguide/managedomains-cloudwatchmetrics.md b/opensearch-service/latest/developerguide/managedomains-cloudwatchmetrics.md
index a3061a5f3..a9fa185a5 100644
--- a//opensearch-service/latest/developerguide/managedomains-cloudwatchmetrics.md
+++ b//opensearch-service/latest/developerguide/managedomains-cloudwatchmetrics.md
@@ -135,0 +136 @@ The logic for this metric changed in service software R20220323. For more inform
+`TLSNegotiationError` |  The number of failed TLS handshake attempts between clients and the domain endpoint. This metric increments when a client attempts to connect using an unsupported TLS version or cipher suite. Relevant statistics: Sum