Clients using JDK 6 are experiencing handshake failures when connecting to Gateway 10 CR3
Most recents version of Gateway are coded to support only stronger and secure communication protocols and ciphers.
Broadcom published all features that have been deprecated in Gateway 10 under the following product document section:
Deprecated Features and Support: https://techdocs.broadcom.com/us/en/ca-enterprise-software/layer7-api-management/api-gateway/10-0/release-notes/deprecated-features-and-support.html
Some of the new security restrictions may impact clients using outdated/unsafe protocols, like for example the following one:
"...Removed SSL Protocols Beginning with Gateway version 10.0 CR3, the following SSL protocols that were deprecated earlier have been removed from Gateway: SSLv2, SSLv3, and SSLv2 Compatible Client Hello. We recommend you to use TLS 1.2 or higher instead..."
Release : 10.0
Component : CR3
Earlier versions of JDK 6 do not support TLS 1.2 handshake out of the box. JDK 6 introduced support for TLS 1.2 starting from update 121 (JDK 6u121)
Hence, clients that would like to continue using JDK 6, are required to update to version 121 or higher.