--- loncom/LondConnection.pm	2010/12/21 11:17:33	1.50
+++ loncom/LondConnection.pm	2011/01/20 11:16:20	1.51
@@ -1,7 +1,7 @@
 #   This module defines and implements a class that represents
 #   a connection to a lond daemon.
 #
-# $Id: LondConnection.pm,v 1.50 2010/12/21 11:17:33 foxr Exp $
+# $Id: LondConnection.pm,v 1.51 2011/01/20 11:16:20 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -200,6 +200,7 @@ sub new {
 	return undef;		# Inidicates the socket could not be made.
     }
     my $socket = $self->{Socket}; # For local use only.
+    $socket->sockopt(SO_KEEPALIVE, 1); # Turn on keepalive probes when idle.
     #  If we are local, we'll first try local auth mode, otherwise, we'll try
     #  the ssl auth mode: