Security hardening restricts access to certain ports on the Advanced SQL Engine node, which can cause problems when trying to perform a migration to the system.
The message BYPASS_AR_MONITOR CNS connect timeout indicates a failure to connect to the CNS subsystem on the cnshost control node.
If this occurs during a migration, it is likely that access to port 3015 is restricted. To correct the problem, reopen port 3015 because it is needed to perform the migration.
For more information, see Teradata Vantage™ on AWS (DIY) Installation and Administration Guide, B035-2800.