diff --git a/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/IssuerDBCAS.pm b/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/IssuerDBCAS.pm
index 0ce232de7..583efd48f 100644
--- a/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/IssuerDBCAS.pm
+++ b/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/IssuerDBCAS.pm
@@ -59,14 +59,113 @@ sub issuerForUnAuthUser {
 
         # Gateway
         # Authentication must use non-interactive mean
-        # TODO
         if ( $gateway eq 'true' ) {
-            $self->lmLog( "Gateway authentication not managed", 'error' );
-            return PE_ERROR;
+
+            # TODO
+            $self->lmLog( "Gateway authentication not managed", 'warn' );
+
         }
 
     }
 
+    # 2. LOGOUT
+    if ( $url =~ /\Q$cas_logout_url\E/io ) {
+
+        $self->lmLog( "URL $url detected as an CAS LOGOUT URL", 'debug' );
+
+        # GET parameters
+        my $logout_url = $self->param('url');
+
+        if ($logout_url) {
+
+            # We should display a link to the provided URL
+            # TODO
+            $self->lmLog( "Return URL not managed", 'warn' );
+        }
+
+        return PE_LOGOUT_OK;
+
+    }
+
+    # 3. VALIDATE [CAS 1.0]
+    if ( $url =~ /\Q$cas_validate_url\E/io ) {
+
+        $self->lmLog( "URL $url detected as an CAS VALIDATE URL", 'debug' );
+
+        # GET parameters
+        my $service = $self->param('service');
+        my $ticket  = $self->param('ticket');
+        my $renew   = $self->param('renew');
+
+        # Required parameters: service and ticket
+        unless ( $service and $ticket ) {
+            $self->lmLog( "Service and Ticket parameters required", 'error' );
+            $self->returnCasValidateError();
+        }
+
+        # Get CAS session corresponding to ticket
+        $ticket =~ s/^ST-//;
+
+        my $casServiceSession = $self->getCasSession($ticket);
+
+        unless ($casServiceSession) {
+            $self->lmLog( "Service ticket session $ticket not found", 'error' );
+            untie %$casServiceSession;
+            $self->returnCasValidateError();
+        }
+
+        $self->lmLog( "Service ticket session $ticket found", 'debug' );
+
+        # Check service
+        unless ( $service eq $casServiceSession->{service} ) {
+            $self->lmLog(
+                "Submitted service $service does not match initial service "
+                  . $casServiceSession->{service},
+                'error'
+            );
+            untie %$casServiceSession;
+            $self->returnCasValidateError();
+        }
+
+        $self->lmLog( "Submitted service $service math initial servce",
+            'debug' );
+
+        # Check renew
+        if ( $renew eq 'true' ) {
+
+            # We should check the ST was delivered with primary credentials
+            # TODO
+            $self->lmLog( "Renew parameter not managed", 'warn' );
+        }
+
+        # Open local session
+        my $localSession =
+          $self->getApacheSession( $casServiceSession->{id}, 1 );
+
+        unless ($localSession) {
+            $self->lmLog(
+                "Local session " . $casServiceSession->{id} . " notfound",
+                'error' );
+            untie %$casServiceSession;
+            $self->returnCasValidateError();
+        }
+
+        # Get username
+        my $username = $localSession->{ $self->{whatToTrace} };
+
+        $self->lmLog( "Get username $username", 'debug' );
+
+        # Close sessions
+        untie %$casServiceSession;
+        untie %$localSession;
+
+        # Return success message
+        $self->returnCasValidateSuccess($username);
+
+        # We should not be there
+        return PE_ERROR;
+    }
+
     PE_OK;
 }
 
@@ -151,6 +250,47 @@ sub issuerForAuthUser {
         return $self->_subProcess(qw(autoRedirect));
     }
 
+    # 2. LOGOUT
+    if ( $url =~ /\Q$cas_logout_url\E/io ) {
+
+        $self->lmLog( "URL $url detected as an CAS LOGOUT URL", 'debug' );
+
+        # GET parameters
+        my $logout_url = $self->param('url');
+
+        if ($logout_url) {
+
+            # We should display a link to the provided URL
+            # TODO
+        }
+
+        # Delete linked CAS sessions
+        # TODO
+
+        # Delete local session
+        unless (
+            $self->_deleteSession( $self->getApacheSession( $session_id, 1 ) ) )
+        {
+            $self->lmLog( "Fail to delete session $session_id ", 'error' );
+        }
+
+        return PE_LOGOUT_OK;
+
+    }
+
+    # 3. VALIDATE [CAS 1.0]
+    if ( $url =~ /\Q$cas_validate_url\E/io ) {
+
+        $self->lmLog( "URL $url detected as an CAS VALIDATE URL", 'debug' );
+
+        # This URL is not called by authenticated users
+        $self->lmLog(
+            "CAS VALIDATE URL called by authenticated user, ignore it",
+            'info' );
+
+        return PE_OK;
+    }
+
     PE_OK;
 }
 
diff --git a/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/_CAS.pm b/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/_CAS.pm
index 721fa0f11..617297ffe 100644
--- a/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/_CAS.pm
+++ b/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/_CAS.pm
@@ -35,6 +35,31 @@ sub getCasSession {
     return \%h;
 }
 
+## @method void returnCasValidateError()
+# Return an error for CAS VALIDATE request
+# @return nothing
+sub returnCasValidateError {
+    my ($self) = splice @_;
+
+    print $self->header();
+    print "no\n\n";
+
+    $self->quit();
+}
+
+## @method void returnCasValidateSuccess(string username)
+# Return success for CAS VALIDATE request
+# @param username User name
+# @return nothing
+sub returnCasValidateSuccess {
+    my ( $self, $username ) = splice @_;
+
+    print $self->header();
+    print "yes\n$username\n";
+
+    $self->quit();
+}
+
 __END__
 
 =head1 NAME
@@ -58,6 +83,14 @@ This module contains common methods for CAS
 Try to recover the CAS session corresponding to id and return session datas
 If id is set to undef, return a new session
 
+=head2 returnCasValidateError
+
+Return an error for CAS VALIDATE request
+
+=head2 returnCasValidateSuccess
+
+Return success for CAS VALIDATE request
+
 =head1 SEE ALSO
 
 L<Lemonldap::NG::Portal::IssuerDBCAS>,