[oe] [meta-networking][PATCH] sshguard 1.6.1+git: add recipe

[Koen Kooi]

SSHguard protects hosts from brute-force attacks against SSH and other
services.

This recipe uses iptables as blocker backend and journald as log backend.

When it's working it will look like this in syslog:

Sep 03 19:35:29 soekris sshguard[27044]: Started with danger threshold=40 ; minimum block=420 seconds
Sep 03 19:35:29 soekris sshguard[27044]: Blocking 24.234.171.90:4 for >630secs: 40 danger in 4 attacks over 0 seconds (all: 40d in 1 abuses over 0s).
Sep 03 19:35:29 soekris sshguard[27044]: Blocking 61.182.15.194:4 for >630secs: 40 danger in 4 attacks over 0 seconds (all: 40d in 1 abuses over 0s).
Sep 03 19:35:29 soekris sshguard[27044]: Blocking 115.58.38.53:4 for >630secs: 40 danger in 4 attacks over 0 seconds (all: 40d in 1 abuses over 0s).

And the iptable rules:

root at soekris:~# iptables -L sshguard --line-numbers
Chain sshguard (1 references)
num  target     prot opt source               destination
1    DROP       all  --  hn.kd.ny.adsl        anywhere
2    DROP       all  --  61.182.15.194        anywhere
3    DROP       all  --  wsip-24-234-171-90.lv.lv.cox.net  anywhere

Signed-off-by: Koen Kooi <koen at dominion.thruhere.net>
---
 .../recipes-support/sshguard/sshguard/firewall     | 48 ++++++++++++++++++++++
 .../sshguard/sshguard/sshguard-journalctl          |  2 +
 .../sshguard/sshguard/sshguard.service             | 12 ++++++
 .../recipes-support/sshguard/sshguard_git.bb       | 38 +++++++++++++++++
 4 files changed, 100 insertions(+)
 create mode 100644 meta-networking/recipes-support/sshguard/sshguard/firewall
 create mode 100644 meta-networking/recipes-support/sshguard/sshguard/sshguard-journalctl
 create mode 100644 meta-networking/recipes-support/sshguard/sshguard/sshguard.service
 create mode 100644 meta-networking/recipes-support/sshguard/sshguard_git.bb

diff --git a/meta-networking/recipes-support/sshguard/sshguard/firewall b/meta-networking/recipes-support/sshguard/sshguard/firewall
new file mode 100644
index 0000000..b683368
--- /dev/null
+++ b/meta-networking/recipes-support/sshguard/sshguard/firewall
@@ -0,0 +1,48 @@
+#!/bin/sh
+
+#
+# Function that enables firewall
+#
+do_enable_firewall()
+{
+	# creating sshguard chain
+	iptables -N sshguard 2> /dev/null
+	ip6tables -N sshguard 2> /dev/null
+	# block traffic from abusers
+	iptables -I INPUT -j sshguard 2> /dev/null
+	ip6tables -I INPUT -j sshguard 2> /dev/null
+}
+#
+# Function that disables firewall
+#
+do_disable_firewall()
+{
+	# flushes list of abusers
+	iptables -F sshguard 2> /dev/null
+	ip6tables -F sshguard 2> /dev/null
+	# removes sshguard firewall rules
+	iptables -D INPUT -j sshguard 2> /dev/null
+	ip6tables -D INPUT -j sshguard 2> /dev/null
+	# removing sshguard chain
+	iptables -X sshguard 2> /dev/null
+	ip6tables -X sshguard 2> /dev/null
+}
+
+case "$1" in
+    enable)
+	do_enable_firewall
+	;;
+    disable)
+	do_disable_firewall
+	;;
+    restart)
+	do_disable_firewall
+	do_enable_firewall
+	;;
+    *)
+	exit 1
+	;;
+esac
+	
+exit 0
+
diff --git a/meta-networking/recipes-support/sshguard/sshguard/sshguard-journalctl b/meta-networking/recipes-support/sshguard/sshguard/sshguard-journalctl
new file mode 100644
index 0000000..e7c615b
--- /dev/null
+++ b/meta-networking/recipes-support/sshguard/sshguard/sshguard-journalctl
@@ -0,0 +1,2 @@
+#!/bin/sh
+/bin/journalctl -fb -t sshd -n100 | /usr/sbin/sshguard -l- "$@"
diff --git a/meta-networking/recipes-support/sshguard/sshguard/sshguard.service b/meta-networking/recipes-support/sshguard/sshguard/sshguard.service
new file mode 100644
index 0000000..e2590fa
--- /dev/null
+++ b/meta-networking/recipes-support/sshguard/sshguard/sshguard.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=SSHGuard
+After=network.service
+
+[Service]
+PIDFile=/run/sshguard.pid
+ExecStartPre=/usr/lib/sshguard/firewall enable
+ExecStopPost=/usr/lib/sshguard/firewall disable
+ExecStart=/usr/lib/sshguard/sshguard-journalctl -i /run/sshguard.pid
+
+[Install]
+WantedBy=multi-user.target
diff --git a/meta-networking/recipes-support/sshguard/sshguard_git.bb b/meta-networking/recipes-support/sshguard/sshguard_git.bb
new file mode 100644
index 0000000..04435e8
--- /dev/null
+++ b/meta-networking/recipes-support/sshguard/sshguard_git.bb
@@ -0,0 +1,38 @@
+SUMMARY = "SSHguard protects hosts from brute-force attacks against SSH and other services."
+
+LICENSE = "ISC"
+LIC_FILES_CHKSUM = "file://COPYING;md5=47a33fc98cd20713882c4d822a57bf4d"
+
+PV = "1.6.1+git${SRCPV}"
+
+SRCREV = "019a0406811a536faf3f90cdd7a0a538ee24d789"
+SRC_URI = "git://bitbucket.org/sshguard/sshguard.git;protocol=https;branch=1.6 \
+           file://firewall \
+           file://sshguard.service \
+           file://sshguard-journalctl \
+          "
+
+S = "${WORKDIR}/git"
+
+DEPENDS = "flex-native"
+
+inherit autotools-brokensep systemd
+
+EXTRA_OECONF += " --with-firewall=iptables \
+                  --with-iptables=${sbindir}/iptables \
+                "
+
+do_install_append() {
+    install -d ${D}${libdir}/sshguard
+    install -m 0755 ${WORKDIR}/firewall ${D}${libdir}/sshguard
+    install -m 0755 ${WORKDIR}/sshguard-journalctl ${D}${libdir}/sshguard
+
+    sed -i -e s:/bin:${base_bindir}:g -e s:/usr/sbin:${sbindir}:g ${D}${libdir}/sshguard/sshguard-journalctl
+
+    install -d ${D}${systemd_unitdir}/system
+    install -m 0644 ${WORKDIR}/sshguard.service ${D}${systemd_unitdir}/system
+    sed -i -e s:/usr/lib:${libdir}:g ${D}${systemd_unitdir}/system/sshguard.service 
+}
+
+FILES_${PN} += "${systemd_unitdir}"
+RDEPENDS_${PN} += "iptables"
-- 
2.0.1