diff --git a/etc/defaults/periodic.conf b/etc/defaults/periodic.conf
index 8267ac734072..29e3b00a9d8c 100644
--- a/etc/defaults/periodic.conf
+++ b/etc/defaults/periodic.conf
@@ -160,6 +160,9 @@ daily_status_security_diff_flags="-b -u"		# flags for diff output
 # 100.chksetuid
 daily_status_security_chksetuid_enable="YES"
 
+# 110.neggrpperm
+daily_status_security_neggrpperm_enable="NO"
+
 # 200.chkmounts
 daily_status_security_chkmounts_enable="YES"
 #daily_status_security_chkmounts_ignore="^amd:"		# Don't check matching
diff --git a/etc/periodic/security/110.neggrpperm b/etc/periodic/security/110.neggrpperm
new file mode 100755
index 000000000000..68d1e7b24d77
--- /dev/null
+++ b/etc/periodic/security/110.neggrpperm
@@ -0,0 +1,54 @@
+#!/bin/sh -
+#
+# Copyright (c) 2001  The FreeBSD Project
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# If there is a global system configuration file, suck it in.
+#
+if [ -r /etc/defaults/periodic.conf ]
+then
+    . /etc/defaults/periodic.conf
+    source_periodic_confs
+fi
+
+rc=0
+
+case "$daily_status_security_neggrpperm_enable" in
+    [Yy][Ee][Ss])
+	echo ""
+	echo 'Checking negative group permissions:'
+	MP=`mount -t ufs,zfs | awk '$0 !~ /no(suid|exec)/ { print $3 }'`
+	n=$(find -sx $MP /dev/null -type f \
+	    \( \( ! -perm +010 -and -perm +001 \) -or \
+	    \( ! -perm +020 -and -perm +002 \) -or \
+	    \( ! -perm +040 -and -perm +004 \) \) \
+	    -exec ls -liTd \{\} \+ | tee /dev/stderr | wc -l)
+	[ $n -gt 0 ] && rc=1 || rc=0
+	;;
+esac
+
+exit $rc
diff --git a/etc/periodic/security/Makefile b/etc/periodic/security/Makefile
index fc6772386945..74e7b61e040f 100644
--- a/etc/periodic/security/Makefile
+++ b/etc/periodic/security/Makefile
@@ -3,6 +3,7 @@
 .include <bsd.own.mk>
 
 FILES=	100.chksetuid \
+	110.neggrpperm \
 	200.chkmounts \
 	300.chkuid0 \
 	400.passwdless \
diff --git a/share/man/man5/periodic.conf.5 b/share/man/man5/periodic.conf.5
index a3775d88c457..321361553e25 100644
--- a/share/man/man5/periodic.conf.5
+++ b/share/man/man5/periodic.conf.5
@@ -482,6 +482,14 @@ Set to
 .Dq Li YES
 to compare the modes and modification times of setuid executables with
 the previous day's values.
+.It Va daily_status_security_neggrpperm_enable
+.Pq Vt bool
+Set to
+.Dq Li YES
+to check for files where the group of a file has less permissions than
+the world at large.
+When users are in more than 14 supplemental groups these negative
+permissions may not be enforced via NFS shares.
 .It Va daily_status_security_chkmounts_enable
 .Pq Vt bool
 Set to