diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/users/services/AuthenticationProviderLoggingDecorator.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/users/services/AuthenticationProviderLoggingDecorator.java
new file mode 100644
index 000000000..015978306
--- /dev/null
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/users/services/AuthenticationProviderLoggingDecorator.java
@@ -0,0 +1,69 @@
+/*
+ * This file is part of NavalPlan
+ *
+ * Copyright (C) 2011 Igalia, S.L.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.navalplanner.web.users.services;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.security.Authentication;
+import org.springframework.security.AuthenticationException;
+import org.springframework.security.providers.AuthenticationProvider;
+
+public class AuthenticationProviderLoggingDecorator implements AuthenticationProvider {
+
+    private static final Log LOG = LogFactory
+            .getLog(AuthenticationProviderLoggingDecorator.class);
+
+    private AuthenticationProvider decoratedProvider;
+
+    public AuthenticationProvider getDecoratedProvider() {
+        return decoratedProvider;
+    }
+
+    public void setDecoratedProvider(AuthenticationProvider decoratedProvider) {
+        this.decoratedProvider = decoratedProvider;
+    }
+
+    @Override
+    public Authentication authenticate(Authentication authentication)
+            throws AuthenticationException {
+        Object principal = authentication != null ? authentication
+                .getPrincipal() : null;
+        LOG.info("trying to authenticate " + principal);
+        try {
+            Authentication result = decoratedProvider
+                    .authenticate(authentication);
+            if (result != null) {
+                LOG.info("successful authentication for: " + principal
+                        + " with provider: " + decoratedProvider);
+            }
+            return result;
+        } catch (AuthenticationException e) {
+            LOG.info("unsuccesful authentication of " + principal
+                    + " with provider: " + decoratedProvider);
+            throw e;
+        }
+    }
+
+    @Override
+    public boolean supports(Class authentication) {
+        return decoratedProvider.supports(authentication);
+    }
+
+}
diff --git a/navalplanner-webapp/src/main/resources/log4j.xml b/navalplanner-webapp/src/main/resources/log4j.xml
index 7dc4628d6..5adfde35d 100644
--- a/navalplanner-webapp/src/main/resources/log4j.xml
+++ b/navalplanner-webapp/src/main/resources/log4j.xml
@@ -60,10 +60,30 @@
   <logger name="profiling" additivity="false">
     <level value="info" />
     <appender-ref ref="ASYNC-profiling" />
+   </logger>
+
+  <appender name="logins" class="org.apache.log4j.DailyRollingFileAppender">
+    <param name="file" value="${navalplan-log-directory}navalplan-logins.log" />
+    <param name="datePattern" value="'.'yyyy-MM-dd" /> <!-- Rollover each midnight -->
+
+    <layout class="org.apache.log4j.PatternLayout">
+      <param name="ConversionPattern" value="%-5p [%d{dd-MMMM HH:mm:ss}] [%t] %c %x - %m%n" />
+    </layout>
+  </appender>
+
+  <appender name="ASYNC-logins" class="org.apache.log4j.AsyncAppender">
+    <param name="BufferSize" value="1000" />
+    <appender-ref ref="logins" />
+  </appender>
+
+  <logger name="org.navalplanner.web.users.services.AuthenticationProviderLoggingDecorator"
+          additivity="true">
+    <level value="info" />
+    <appender-ref ref="ASYNC-logins" />
   </logger>
 
   <root>
     <priority value="info" />
     <appender-ref ref="ASYNC" />
   </root>
-</log4j:configuration>
\ No newline at end of file
+</log4j:configuration>
diff --git a/navalplanner-webapp/src/main/resources/navalplanner-webapp-spring-security-config.xml b/navalplanner-webapp/src/main/resources/navalplanner-webapp-spring-security-config.xml
index 59d45a062..c234d1699 100644
--- a/navalplanner-webapp/src/main/resources/navalplanner-webapp-spring-security-config.xml
+++ b/navalplanner-webapp/src/main/resources/navalplanner-webapp-spring-security-config.xml
@@ -68,7 +68,7 @@
     <beans:bean id="saltSource"
         class="org.springframework.security.providers.dao.salt.ReflectionSaltSource"
         p:userPropertyToUse="username" />
-    <!-- <beans:bean id="authenticationProvider" class="org.springframework.security.providers.dao.DaoAuthenticationProvider"
+    <!-- <beans:bean id="realAuthenticationProvider" class="org.springframework.security.providers.dao.DaoAuthenticationProvider"
         p:passwordEncoder-ref="passwordEncoder" p:saltSource-ref="saltSource" p:userDetailsService-ref="dbUserDetailsService">
         <custom-authentication-provider/> </beans:bean> -->
     <!-- Beans used by the NavalPlan Web application when users are registered
@@ -98,16 +98,20 @@
         when an LDAP is used. Also will allow authenticate users in database. The
         property strUserId must be set with the proper value. It represents the property
         of the user in LDAP which will be used to check the username. -->
-    <beans:bean id="authenticationProvider"
+    <beans:bean id="realAuthenticationProvider"
         class="org.navalplanner.web.users.services.LDAPCustomAuthenticationProvider"
         p:userDetailsService-ref="ldapUserDetailsService"
         p:ldapTemplate-ref="ldapTemplate"
         p:passwordEncoderService-ref="dbPasswordEncoderService">
-        <custom-authentication-provider />
+    </beans:bean>
+
+    <beans:bean id="authenticationProvider" class="org.navalplanner.web.users.services.AuthenticationProviderLoggingDecorator">
+        <beans:property name="decoratedProvider" ref="realAuthenticationProvider"></beans:property>
+        <custom-authentication-provider/>
     </beans:bean>
 
     <!-- This bean is used to implement UserDetailsService with LDAP authentication
         Provider. -->
     <beans:bean id="ldapUserDetailsService"
         class="org.navalplanner.web.users.services.LDAPUserDetailsService" />
-</beans:beans>
\ No newline at end of file
+</beans:beans>