diff --git a/Shorewall-common/changelog.txt b/Shorewall-common/changelog.txt
index 09435414f..777da5059 100644
--- a/Shorewall-common/changelog.txt
+++ b/Shorewall-common/changelog.txt
@@ -8,6 +8,8 @@ Changes in 4.1.8
 
 4)  Add the -p option to start and stop
 
+5)  Allow installers to run under Cygwin without extra parameters.
+
 Changes in 4.1.7
 
 1)  Fix port verification.
diff --git a/Shorewall-common/install.sh b/Shorewall-common/install.sh
index 129eeb9fb..e758be00a 100755
--- a/Shorewall-common/install.sh
+++ b/Shorewall-common/install.sh
@@ -149,13 +149,24 @@ if [ -z "$RUNLEVELS" ] ; then
 	RUNLEVELS=""
 fi
 
-if [ -z "$OWNER" ] ; then
-	OWNER=root
-fi
+DEBIAN=
+CYGWIN=
 
-if [ -z "$GROUP" ] ; then
-	GROUP=root
-fi
+case $(uname) in
+    CYGWIN*)
+	DEST=
+	INIT=
+	OWNER=$(id -un)
+	GROUP=$(id -gn)
+	CYGWIN=Yes
+	;;
+    *)
+	[ -z "$OWNER" ] && OWNER=root
+	[ -z "$GROUP" ] && GROUP=root
+	;;
+esac
+
+OWNERSHIP="-o $OWNER -g $GROUP"
 
 NOBACKUP=
 
@@ -184,35 +195,29 @@ PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
 #
 # Determine where to install the firewall script
 #
-DEBIAN=
-CYGWIN=
-
-OWNERSHIP="-o $OWNER -g $GROUP"
 
 if [ -n "$PREFIX" ]; then
-	if [ `id -u` != 0 ] ; then
-	    echo "Not setting file owner/group permissions, not running as root."
-	    OWNERSHIP=""
-	fi
+    if [ -z "$CYGWIN" -a `id -u` != 0 ] ; then
+	echo "Not setting file owner/group permissions, not running as root."
+	OWNERSHIP=""
 
 	install -d $OWNERSHIP -m 755 ${PREFIX}/sbin
 	install -d $OWNERSHIP -m 755 ${PREFIX}${DEST}
+    fi    
 else
     [ -x /usr/share/shorewall-shell/compiler -o -x /usr/share/shorewall-perl/compiler.pl ] || \
 	{ echo "   ERROR: No Shorewall compiler is installed" >&2; exit 1; }
-    if [ -d /etc/apt -a -e /usr/bin/dpkg ]; then
-	DEBIAN=yes
-    elif [ -f /etc/slackware-version ] ; then
-	DEST="/etc/rc.d"
-	INIT="rc.firewall"
-    elif [ -f /etc/arch-release ] ; then
-	DEST="/etc/rc.d"
-	INIT="shorewall"
-	ARCHLINUX=yes
-    elif [ -d /cygdrive ]; then
-	DEST=
-	INIT=
-	CYGWIN=yes
+    if [ -z "$CYGWIN" ]; then
+	if [ -d /etc/apt -a -e /usr/bin/dpkg ]; then
+	    DEBIAN=yes
+	elif [ -f /etc/slackware-version ] ; then
+	    DEST="/etc/rc.d"
+	    INIT="rc.firewall"
+	elif [ -f /etc/arch-release ] ; then
+	    DEST="/etc/rc.d"
+	    INIT="shorewall"
+	    ARCHLINUX=yes
+	fi
     fi
 fi
 
diff --git a/Shorewall-common/releasenotes.txt b/Shorewall-common/releasenotes.txt
index 8a209dbf8..f74b38811 100644
--- a/Shorewall-common/releasenotes.txt
+++ b/Shorewall-common/releasenotes.txt
@@ -101,6 +101,10 @@ Other Changes in Shoreall 4.1.8.
     c) The arithmetic operators +-* and /.
     d) The word 'full'.
 
+2)  The installers (install.sh) now auto-detect a Cygwin environment
+    and install under the current user's ID if OWNER and GROUP are not
+    given.
+
 New Features in Shorewall 4.1.
 
 1)  Shorewall 4.1 contains support for multiple Internet providers
@@ -380,17 +384,23 @@ New Features in Shorewall 4.1.
     traffic by MARK value. Previously, Shorewall used the CLASSIFY
     target in the POSTROUTING chain if it was available.
 
-14) The Shorewall-common installer (install.sh) now works on Windows
-    under Cygwin.
+14) The Shorewall installers (install.sh) now work on Windows
+    under Cygwin. By default, they install under the user id and group
+    of the person doing the install. This can be overridden by
+    specifying OWNER and GROUP explicitly.
+
+    Example:
+
+	OWNER=foo GROUP=bar ./install.sh
 
     To install Shorewall-perl under Cygwin:
 
     $ tar -zxf shorewall-perl-4.x.y.tar.bz2
     $ tar -zxf shorewall-common-4.x.y.tar.bz2
     $ cd shorewall-perl-4.x.y
-    $ USER=<your user id> GROUP=None ./install.sh
+    $ ./install.sh
     $ cd ../shorewall-common-4.x.y
-    $ USER=<your user id> GROUP=None ./install.sh
+    $ ./install.sh
     
     The 'shorewall' program is installed in /bin/ (a.k.a, /usr/bin/).
 
diff --git a/Shorewall-perl/install.sh b/Shorewall-perl/install.sh
index 7ea437355..5de72b511 100755
--- a/Shorewall-perl/install.sh
+++ b/Shorewall-perl/install.sh
@@ -102,13 +102,18 @@ if [ -z "$RUNLEVELS" ] ; then
 	RUNLEVELS=""
 fi
 
-if [ -z "$OWNER" ] ; then
-	OWNER=root
-fi
-
-if [ -z "$GROUP" ] ; then
-	GROUP=root
-fi
+case $(uname) in
+    CYGWIN*)
+	DEST=
+	INIT=
+	OWNER=$(id -un)
+	GROUP=$(id -gn)
+	;;
+    *)
+	[ -z "$OWNER" ] && OWNER=root
+	[ -z "$GROUP" ] && GROUP=root
+	;;
+esac
 
 NOBACKUP=
 
diff --git a/Shorewall-shell/install.sh b/Shorewall-shell/install.sh
index d1453aba9..d3209054a 100755
--- a/Shorewall-shell/install.sh
+++ b/Shorewall-shell/install.sh
@@ -149,13 +149,18 @@ if [ -z "$RUNLEVELS" ] ; then
 	RUNLEVELS=""
 fi
 
-if [ -z "$OWNER" ] ; then
-	OWNER=root
-fi
-
-if [ -z "$GROUP" ] ; then
-	GROUP=root
-fi
+case $(uname) in
+    CYGWIN*)
+	DEST=
+	INIT=
+	[ -z "$OWNER" ] && OWNER=$(id -un)
+	[ -z "$GROUP" ] && GROUP=$(id -gn)
+	;;
+    *)
+	[ -z "$OWNER" ] && OWNER=root
+	[ -z "$GROUP" ] && GROUP=root
+	;;
+esac
 
 NOBACKUP=
 
@@ -184,7 +189,6 @@ PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
 #
 # Determine where to install the firewall script
 #
-DEBIAN=
 
 OWNERSHIP="-o $OWNER -g $GROUP"