Whether statistics are to be gathered for undertow subsystem. requires SSL transport, undertow will automatically redirect the request to the socket binding port specified here. ]]> requires SSL transport, undertow will automatically redirect the request to the socket binding port specified here. ]]> Default response code should be set in case server should respond with nonstandard code( other than 404 ) for unavailable resource. For instance, server behind load balancer might want to respond with 5xx code to avoid being dropped by it.