Oracle HIPAA/FIPS-Compliant Encrypted Connections
SSLFIPS_140 is used for SSL-based encryption. That is not related to native network encryption.


  Is Oracle native network encryption [1,2] HIPAA/FIPS compliant? 
  
  If so, is any configuration required or is it compliant by default?


https://docs.oracle.com/database/121/DBSEG/asoappe.htm#DBSEG1061


  For native encryption, this behavior of cryptographic operations
  landing in RSA/Micro Edition Suite (MES) and being accelerated is
  similar to the above, except that it is determined by the FIPS_140
  setting in sqlnet.ora (instead of the SSL_FIPS140 setting in
  fips.ora).


This parameter is available since version 12.1.


  Are there certain encryption algorithms that are/are not compliant?


https://docs.oracle.com/database/121/DBSEG/asoappe.htm#DBSEG9828


  Only the following cipher suites are approved for FIPS validation:
  
  
  SSL_DH_anon_WITH_3DES_EDE_CBC_SHA
  SSL_RSA_WITH_AES_256_CBC_SHA
  SSL_RSA_WITH_AES_128_CBC_SHA
  SSL_RSA_WITH_AES_256_GCM_SHA384
  SSL_RSA_WITH_3DES_EDE_CBC_SHA
  


Could not find a list specifically for native encryption, but you can set the algorithms based on the above. After setting the above parameter, if you choose an algorithm that is not compliant, you can not connect to the database and will receive the below error:

ORA-12630: Native service operation not supported