--- loncom/configuration/Firewall.pm	2021/12/21 13:57:47	1.24
+++ loncom/configuration/Firewall.pm	2024/04/24 21:34:44	1.26
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Firewall configuration to allow internal LON-CAPA communication between servers   
 #
-# $Id: Firewall.pm,v 1.24 2021/12/21 13:57:47 raeburn Exp $
+# $Id: Firewall.pm,v 1.26 2024/04/24 21:34:44 raeburn Exp $
 #
 # The LearningOnline Network with CAPA
 #
@@ -365,6 +365,18 @@ sub firewall_is_active {
             }
             close(PIPE);
         }
+        unless ($status) {
+            if (open(PIPE,'nft list tables |')) {
+                while(<PIPE>) {
+                    chomp();
+                    if (/filter$/) {
+                        $status = 1;
+                        last;
+                    }   
+                }           
+                close(PIPE);      
+            }           
+        }
     }
     unless ($status) {
         $status = &uses_firewalld();
@@ -689,7 +701,7 @@ sub get_fw_chains {
                         print("Unable to find iptables file containing static definitions.\n");
                     }
                 }
-                if ($distro =~ /^(fedora|rhes|centos|scientific|oracle|rocky|alma)(\d+){?:|\-stream)$/) {
+                if ($distro =~ /^(fedora|rhes|centos|scientific|oracle|rocky|alma)(\d+)(?:|\-stream)$/) {
                     unless ((($1 eq 'fedora') && ($2 > 15)) || (($1 ne 'fedora') && ($2 >= 7))) {
                         push(@fw_chains,'RH-Firewall-1-INPUT');
                     }