network/sshguard: Added (SSH brute-force attack protection).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

network/sshguard/README

@@ -0,0 +1,14 @@
+SSHGuard protects hosts from brute-force attacks against SSH and other services.
+It has been written entirely in C and has no external dependencies and no
+configuration file. SSHGuard aggregates system logs and blocks repeat offenders.
+It can read log messages from standard input (suitable for piping from syslog)
+or monitor one or more log files. Log messages are parsed, line-by-line, for
+recognized patterns. If an attack, such as several login failures within a few
+seconds, is detected, the offending IP is blocked. Offenders are unblocked after
+a set interval, but can be semi-permanently banned using the blacklist option.
+
+IMPORTANT:
+You will need to properly set up "sshguard" chain in iptables. For further
+information PLEASE CONSULT MAN PAGE installed together with this package.
+The information available on the website tends to be outdated, (it is well
+worth reading anyway).

network/sshguard/doinst.sh

@@ -0,0 +1,22 @@
+config() {
+  NEW="$1"
+  OLD="$(dirname $NEW)/$(basename $NEW .new)"
+  if [ ! -r $OLD ]; then
+    mv $NEW $OLD
+  elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then
+    rm $NEW
+  fi
+}
+
+preserve_perms() {
+  NEW="$1"
+  OLD="$(dirname $NEW)/$(basename $NEW .new)"
+  if [ -e $OLD ]; then
+    cp -a $OLD ${NEW}.incoming
+    cat $NEW > ${NEW}.incoming
+    mv ${NEW}.incoming $NEW
+  fi
+  config $NEW
+}
+
+preserve_perms etc/rc.d/rc.sshguard.new

network/sshguard/rc.sshguard

@@ -0,0 +1,45 @@
+#!/bin/sh
+
+################################################################################
+sshguard_start() {
+################################################################################
+  if [ -n "$(pidof sshguard)" ]; then
+    echo "sshguard seems to be already running."
+    return
+  fi
+
+  /usr/sbin/sshguard -l /var/log/messages 1>/dev/null &
+}
+
+################################################################################
+sshguard_stop() {
+################################################################################
+  if [ -z "$(pidof sshguard)" ]; then
+    echo -e "sshguard does not seem to be running."
+    return
+  fi
+
+  kill $(pidof sshguard)
+}
+
+################################################################################
+sshguard_restart() {
+################################################################################
+  sshguard_stop
+  sleep 1
+  sshguard_start
+}
+
+case "$1" in
+'start')
+  sshguard_start
+  ;;
+'stop')
+  sshguard_stop
+  ;;
+'restart')
+  sshguard_restart
+  ;;
+*)
+  echo "usage: $0 start|stop|restart"
+esac

network/sshguard/slack-desc

@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+        |-----handy-ruler------------------------------------------------------|
+sshguard: sshguard (SSH brute-force attack protection)
+sshguard:
+sshguard: SSHGuard protects hosts from brute-force attacks against SSH and
+sshguard: other services. It aggregates system logs and blocks repeat
+sshguard: offenders. SSHGuard can read log messages from standard input
+sshguard: (suitable for piping from syslog) or monitor one or more log files.
+sshguard: If an attack, such as several login failures within a few seconds,
+sshguard: is detected, the offending IP is blocked.
+sshguard:
+sshguard: Homepage: http://www.sshguard.net/
+sshguard:

network/sshguard/sshguard.SlackBuild

@@ -0,0 +1,103 @@
+#!/bin/sh
+
+# Slackware build script for sshguard
+
+# Copyright 2016 Andrzej Telszewski, Banie
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 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.
+
+PRGNAM=sshguard
+VERSION=${VERSION:-1.6.4}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
+cd $PRGNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+./configure \
+  --prefix=/usr \
+  --mandir=/usr/man \
+  --with-firewall=iptables \
+  --with-iptables=/usr/sbin/iptables \
+  --build=$ARCH-slackware-linux
+
+make
+make install DESTDIR=$PKG
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/etc/rc.d
+cat $CWD/rc.$PRGNAM > $PKG/etc/rc.d/rc.$PRGNAM.new
+chmod 0644 $PKG/etc/rc.d/rc.$PRGNAM.new
+
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a examples README.rst COPYING ChangeLog $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+cat $CWD/doinst.sh  > $PKG/install/doinst.sh
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

network/sshguard/sshguard.info

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+PRGNAM="sshguard"
+VERSION="1.6.4"
+HOMEPAGE="http://www.sshguard.net/"
+DOWNLOAD="http://download.sourceforge.net/project/sshguard/sshguard/1.6.4/sshguard-1.6.4.tar.gz"
+MD5SUM="6f8fcbf5384c5c429dbbf13efeeaad1d"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES=""
+MAINTAINER="Andrzej Telszewski"
+EMAIL="atelszewski@gmail.com"