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Support Article

SSL connection fails due to using the wrong version of TLS



REST connector fails with SSLPeerUnverifiedException.

Error Messages

PegaRULES log: Caught unhandled exception: peer not authenticated
JVM debug logs shows: WRITE: TLSv1 Handshake

Steps to Reproduce

Invoke a REST connector.

Root Cause

A defect or configuration issue in the operating environment.
The endpoint requires TLS 1.2; however, Pega and the application server are configured to send a TLS 1 connection.


Perform the following local-change: 
  1. In the Connect-REST rule, set the 'Lowest Allowable SSL/TLS version' to TLS 1.2.
  2. Check with the application server administrator to ensure the application server has TLS 1.2 enabled.

Published July 23, 2018 - Updated October 8, 2020

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