--- conntrackd.initd-r1	2012-02-25 14:46:17.750453995 +0100
+++ conntrackd.initd-r2	2012-02-25 14:49:02.945706134 +0100
@@ -11,6 +11,38 @@
 	need net
 }
 
+KV_to_int()
+{
+	[ -z $1 ] && return 1
+
+	local x=${1%%[!0-9.]*} y= z=
+	local KV_MAJOR=${x%%.*}
+	y=${x#*.}
+	[ "$x" = "$y" ] && y=0.0
+	local KV_MINOR=${y%%.*}
+	z=${y#*.}
+	[ "$y" = "$z" ] && z=0
+	local KV_MICRO=${z%%.*}
+	local KV_int=$((${KV_MAJOR} * 65536 + ${KV_MINOR} * 256 + ${KV_MICRO} ))
+
+	# We make version 2.2.0 the minimum version we will handle as
+	# a sanity check ... if its less, we fail ...
+	[ "${KV_int}" -lt 131584 ] && return 1
+
+	echo "${KV_int}"
+}
+
+_RC_GET_KV_CACHE=""
+get_KV()
+{
+	if [ -z "${_RC_GET_KV_CACHE}" ] ; then
+	_RC_GET_KV_CACHE="$(uname -r)"
+	fi
+	echo "$(KV_to_int "${_RC_GET_KV_CACHE}")"
+
+	return $?
+}
+
 checkconfig() {
 	# check for netfilter conntrack kernel support
 	local nf_ct_available=0
@@ -38,27 +70,30 @@
 		eerror
 		return 1
 	fi
-	# check if netfilter conntrack TCP window tracking is disabled
-	local nf_ct_tcp_be_liberal=0
-	for k in net.netfilter.nf_conntrack_tcp_be_liberal \
-		net.ipv4.netfilter.ip_conntrack_tcp_be_liberal; do
-		nf_ct_tcp_be_liberal=$(sysctl -e -n ${k} 2>/dev/null)
-		if [ ${?} -ne 0 ]; then
-			continue # sysctl key not found
-		else
-			break # sysctl key found
+
+	# check if netfilter conntrack TCP window tracking is disabled (kernel < 2.6.22)
+	if [ $(get_KV) -lt $(KV_to_int 2.6.22) ]; then
+		local nf_ct_tcp_be_liberal=0
+		for k in net.netfilter.nf_conntrack_tcp_be_liberal \
+			net.ipv4.netfilter.ip_conntrack_tcp_be_liberal; do
+			nf_ct_tcp_be_liberal=$(sysctl -e -n ${k} 2>/dev/null)
+			if [ ${?} -ne 0 ]; then
+				continue # sysctl key not found
+			else
+				break # sysctl key found
+			fi
+		done
+		if [ ${nf_ct_tcp_be_liberal} -ne 1 ]; then
+			eerror
+			eerror "You need to disable TCP window tracking for Kernel < 2.6.22!"
+			eerror "Add the following line to your /etc/sysctl.conf:"
+			eerror
+			eerror "  ${k} = 1"
+			eerror
+			eerror "...and run this to activate the setting: sysctl -q -p"
+			eerror
+			return 1
 		fi
-	done
-	if [ ${nf_ct_tcp_be_liberal} -ne 1 ]; then
-		eerror
-		eerror "You need to disable TCP window tracking!"
-		eerror "Add the following line to your /etc/sysctl.conf:"
-		eerror
-		eerror "  ${k} = 1"
-		eerror
-		eerror "...and run this to activate the setting: sysctl -q -p"
-		eerror
-		return 1
 	fi
 	# check for config file
 	if [ ! -e "${CONNTRACKD_CFG}" ]; then