Merge branch 'master' of ssh://git.ipfire.org/pub/git/ipfire-2.x into seventeen-geoip
[ipfire-2.x.git] / config / firewall / rules.pl
index 834e248..cd2f3a6 100644 (file)
@@ -284,7 +284,7 @@ sub buildrules {
                # Concurrent connection limit
                my @ratelimit_options = ();
 
-               if (($elements gt 34) && ($$hash{$key}[32] eq 'ON')) {
+               if (($elements ge 34) && ($$hash{$key}[32] eq 'ON')) {
                        my $conn_limit = $$hash{$key}[33];
 
                        if ($conn_limit ge 1) {
@@ -300,13 +300,13 @@ sub buildrules {
                }
 
                # Ratelimit
-               if (($elements gt 37) && ($$hash{$key}[34] eq 'ON')) {
+               if (($elements ge 37) && ($$hash{$key}[34] eq 'ON')) {
                        my $rate_limit = "$$hash{$key}[35]/$$hash{$key}[36]";
 
-                               if ($rate_limit) {
-                                       push(@ratelimit_options, ("-m", "limit"));
-                                       push(@ratelimit_options, ("--limit", $rate_limit));
-                               }
+                       if ($rate_limit) {
+                               push(@ratelimit_options, ("-m", "limit"));
+                               push(@ratelimit_options, ("--limit", $rate_limit));
+                       }
                }
 
                # Check which protocols are used in this rule and so that we can
@@ -372,20 +372,12 @@ sub buildrules {
                                                push(@source_options, ("-s", $source));
                                        }
 
-                                       if ($source_intf) {
-                                               push(@source_options, ("-i", $source_intf));
-                                       }
-
                                        # Prepare destination options.
                                        my @destination_options = ();
                                        if ($destination) {
                                                push(@destination_options, ("-d", $destination));
                                        }
 
-                                       if ($destination_intf) {
-                                               push(@destination_options, ("-o", $destination_intf));
-                                       }
-
                                        # Add time constraint options.
                                        push(@options, @time_options);
 
@@ -480,6 +472,17 @@ sub buildrules {
                                                }
                                        }
 
+                                       # Add source and destination interface to the filter rules.
+                                       # These are supposed to help filtering forged packets that originate
+                                       # from BLUE with an IP address from GREEN for instance.
+                                       if ($source_intf) {
+                                               push(@source_options, ("-i", $source_intf));
+                                       }
+
+                                       if ($destination_intf) {
+                                               push(@destination_options, ("-o", $destination_intf));
+                                       }
+
                                        push(@options, @source_options);
                                        push(@options, @destination_options);