diff --git a/Shorewall/changelog.txt b/Shorewall/changelog.txt
index 121bf76b6..1e1394283 100755
--- a/Shorewall/changelog.txt
+++ b/Shorewall/changelog.txt
@@ -1,4 +1,4 @@
-Changes in 3.1.0
+Changes in 3.1.x.
 
 1) Removal of dynamic zones.
 
@@ -16,3 +16,5 @@ Changes in 3.1.0
 7) Remove some restrictions on remote compiles.
 
 8) Add error checking to generated script.
+
+9) Merge Fabio Longerai's 'length' patch.
diff --git a/Shorewall/firewall b/Shorewall/firewall
index 34dc65357..be60c98f2 100755
--- a/Shorewall/firewall
+++ b/Shorewall/firewall
@@ -3656,6 +3656,11 @@ process_tc_rule()
 	    esac
 	fi
 
+	if [ "x${length:=-}" != "x-" ]; then
+		[ -n "$LENGTH_MATCH" ] || fatal_error "Your kernel and/or iptables does not have length match support. Rule: \"$rule\""
+		r="${r}-m length --length ${length} "
+	fi
+
 	multiport=
 
 	case $proto in
@@ -3853,9 +3858,9 @@ setup_tc1() {
     #
     strip_file tcrules
 
-    while read mark sources dests proto ports sports user testval; do
-	expandv mark sources dests proto ports sports user testval
-	rule=$(echo "$mark $sources $dests $proto $ports $sports $user $testval")
+    while read mark sources dests proto ports sports user testval length; do
+	expandv mark sources dests proto ports sports user testval length
+	rule=$(echo "$mark $sources $dests $proto $ports $sports $user $testval $length")
 	process_tc_rule
     done < $TMP_DIR/tcrules
     #
@@ -4320,9 +4325,9 @@ refresh_tc() {
         #
         strip_file tcrules
 
-	while read mark sources dests proto ports sports user testval; do
-	    expandv mark sources dests proto ports sports user testval
-	    rule=$(echo "$mark $sources $dests $proto $ports $sports $user $testval")
+	while read mark sources dests proto ports sports user testval length; do
+	    expandv mark sources dests proto ports sports user testval length
+	    rule=$(echo "$mark $sources $dests $proto $ports $sports $user $testval $length")
 	    process_tc_rule
         done < $TMP_DIR/tcrules
     else
diff --git a/Shorewall/functions b/Shorewall/functions
index 72d7d8b35..6cba9e79a 100755
--- a/Shorewall/functions
+++ b/Shorewall/functions
@@ -970,6 +970,7 @@ determine_capabilities() {
     CONNMARK_MATCH=
     RAW_TABLE=
     IPP2P_MATCH=
+    LENGTH_MATCH=
     CLASSIFY_TARGET=
     ENHANCED_REJECT=
 
@@ -984,6 +985,7 @@ determine_capabilities() {
     qt $IPTABLES -A fooX1234 -m owner --uid-owner 0 -j ACCEPT                           && OWNER_MATCH=Yes
     qt $IPTABLES -A fooX1234 -m connmark --mark 2  -j ACCEPT                            && CONNMARK_MATCH=Yes
     qt $IPTABLES -A fooX1234 -p tcp -m ipp2p --ipp2p -j ACCEPT                          && IPP2P_MATCH=Yes
+    qt $IPTABLES -A fooX1234 -m length --length 10:20 -j ACCEPT                         && LENGTH_MATCH=Yes
     qt $IPTABLES -A fooX1234 -j REJECT --reject-with icmp-host-prohibited               && ENHANCED_REJECT=Yes
 
     qt $IPTABLES -t mangle -N fooX1234
@@ -1032,6 +1034,7 @@ report_capabilities() {
 	report_capability "Packet Type Match" $USEPKTTYPE
 	report_capability "Policy Match" $POLICY_MATCH
 	report_capability "Physdev Match" $PHYSDEV_MATCH
+	report_capability "Packet length Match" $LENGTH_MATCH
 	report_capability "IP range Match" $IPRANGE_MATCH
 	report_capability "Recent Match" $RECENT_MATCH
 	report_capability "Owner Match" $OWNER_MATCH
diff --git a/Shorewall/releasenotes.txt b/Shorewall/releasenotes.txt
index 571ef3db9..cb87ab496 100755
--- a/Shorewall/releasenotes.txt
+++ b/Shorewall/releasenotes.txt
@@ -1,4 +1,4 @@
-Shorewall 3.1.2
+Shorewall 3.1.3
 
 Note to users upgrading from Shorewall 2.x or 3.0
 
@@ -26,18 +26,10 @@ Note to users upgrading from Shorewall 2.x or 3.0
    Please see the "Migration Considerations" below for additional upgrade
    information.
 
-Changes in 3.1.2
+New Features in 3.1.3
 
-1) With the execption of 'detectnets', the restrictions on remote compilation
-   (compile on one system and execute on nother) have been removed. It is
-   doubtful that the 'detectnets' restriction will ever be lifted.
-
-2) The compiled script now contains the same error checking as would be done
-   during "shorewall [re]start" -- if an error occurs, a 'restore' or 'stop'
-   is done (requires that Shorewall be installed on the target system).
-
-3) The '-e' option now follows "compile" or "generate" on the command line
-   (it is specific to those commands).
+1)  A LENGTH column has been added to the /etc/shorewall/tcrules file to allow
+    packet marking by packet length. Patch courtesy of Fabio Longerai.
 
 Migration Considerations:
 
diff --git a/Shorewall/tcrules b/Shorewall/tcrules
index f0aaa1840..899010bc7 100755
--- a/Shorewall/tcrules
+++ b/Shorewall/tcrules
@@ -162,10 +162,23 @@
 #					omitted, the packet mark's value is
 #					tested.
 #
+#			If you don't want to define a test but need to specify
+#			anything in the following columns, place a "-" in this
+#			field. 
+#
+#	LENGTH		(Optional) Packet Length. This field, if present
+#			allow you to match the length of a packet against   
+#			a specific value or range of values. You must have
+#			iptables length support for this to work. If you let
+#			it empy or place an "-" here, no length match will be
+#			done.
+#
+#                       Examples: 1024, 64:1500
+#
 # See http://shorewall.net/traffic_shaping.htm for additional information.
 # For usage in selecting among multiple ISPs, see
 # http://shorewall.net/Shorewall_and_Routing.html
 ###############################################################################
-#MARK	SOURCE		DEST		PROTO	PORT(S)	CLIENT	USER	TEST
+#MARK	SOURCE		DEST		PROTO	PORT(S)	CLIENT	USER	TEST	LENGTH
 #							PORT(S)
 #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE