Required ports in Kerberos authentication-enabled clusters for replication
When using Replication Manager with Kerberos authentication-enabled clusters, ensure that the port used for Kerberos KDC Server and KRB5 services are open to all hosts on the destination cluster. By default, this is port 88.
You must also ensure that the required ports listed in the following page are open: Port and network requirements for Replication Manager on CDP Private Cloud Base.