--- loncom/lonnet/perl/lonnet.pm	2018/12/29 16:41:24	1.1399
+++ loncom/lonnet/perl/lonnet.pm	2018/12/29 16:50:06	1.1400
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1399 2018/12/29 16:41:24 raeburn Exp $
+# $Id: lonnet.pm,v 1.1400 2018/12/29 16:50:06 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -690,7 +690,7 @@ sub check_for_valid_session {
             $lonid=$cookies{$secure};
         } elsif (exists($cookies{$name})) {
             $lonid=$cookies{$name};
-        } elsif (exists($cookies{$linkname})) {
+        } elsif ((exists($cookies{$linkname})) && ($ENV{'SERVER_PORT'} != 443)) {
             $lonid=$cookies{$linkname};
         } elsif (exists($cookies{$pubname})) {
             $lonid=$cookies{$pubname};