Red Hat CERTIFICATE SYSTEM 8 - DEPLOYMENT Deployment Manual page 58

Chapter 3. Supported Standards and Protocols
Protocol
IPv4 and IPv6
Table 3.3. Supported Security and Directory Protocols
48
Description
Certificate System supports both IPv4 and IPv6
address namespaces for communications and
operations with all subsystems and tools, as well
as for clients, subsystem creation, and token and
certificate enrollment,