diff --git a/src/main/resources/log4j.properties b/src/main/resources/log4j.properties
index b4a8ca66bf..1938ee2783 100644
--- a/src/main/resources/log4j.properties
+++ b/src/main/resources/log4j.properties
@@ -149,6 +149,9 @@ log4j.logger.org.alfresco.fileserver=warn
 # Integrity message threshold - if 'failOnViolation' is off, then WARNINGS are generated
 log4j.logger.org.alfresco.repo.node.integrity=ERROR
 
+# Brute force attack detection
+log4j.logger.org.alfresco.repo.security.authentication.AuthenticationServiceImpl=warn
+
 # Indexer debugging
 log4j.logger.org.alfresco.repo.search.Indexer=error
 #log4j.logger.org.alfresco.repo.search.Indexer=debug