# fix problem with permissions from the old package
if dpkg --compare-versions "$2" lt "2:1.2.11-4"; then
chown -f -Rh root:root /var/lib/iptables /etc/init.d/iptables \
- /etc/default/iptables >/dev/null 2>&1
+ /etc/default/iptables >/dev/null 2>&1 || true
fi
# remove old iptables init script
-if [ -e /etc/init.d/iptables ]; then
- rm -f /etc/init.d/iptables
- update-rc.d -f iptables remove
-fi
+update-rc.d -f iptables remove >/dev/null 2>&1 || true
# check if old default file exists and import it
if [ -e /etc/default/iptables ]; then
mv /etc/default/iptables /etc/default/iptables-cn
fi
-# check if there is any default netfilter policy and install default SSH
-# REJECT recent if there is none..
-# also, save current set of rules into active and inactive configuration
-if [ ! -e /var/lib/iptables/active ]; then
- . /usr/share/doc/iptables-cn/examples/ssh-bruteforce
+# check to see if fail2ban is installed
+check=(fail2ban fail2ban-cn)
+check=$(dpkg -s $check 2> /dev/null | egrep '^Package:|^Status:' | awk '{if ($1 ~ /^Package:/) { package=$2 } else if ($0 ~ /^Status: .* installed$/) { print package }}')
+if [ "x$check" != "x" ]; then
+ echo "CN: Detected Fail2Ban installation, will remove SSH bruteforce rules by default"
+ iptables -D SSH_Brute_Force -m recent ! --rcheck --seconds 90 \
+ --hitcount 3 --name SSH --rsource \
+ -j RETURN >/dev/null 2>&1 || true
+ iptables -D SSH_Brute_Force -p tcp -j REJECT \
+ --reject-with icmp-port-unreachable >/dev/null 2>&1 || true
+ iptables -D INPUT -p tcp -m tcp --dport 22 -m state \
+ --state NEW -m recent --set --name SSH --rsource \
+ -j SSH_Brute_Force >/dev/null 2>&1 || true
+ iptables -X SSH_Brute_Force >/dev/null 2>&1 || true
+
+ echo "CN: Saving current Netfilter rules to /var/lib/iptables/active"
iptables-save > /var/lib/iptables/active
+else
+ # check if there is any default netfilter policy and install default SSH
+ # REJECT recent if there is none..
+ # also, save current set of rules into active and inactive configuration
+ if [ ! -e /var/lib/iptables/active ]; then
+ if ! iptables-save | grep '^-' >/dev/null; then
+ echo "CN: Netfilter rules empty: importing SSH bruteforce rules"
+ /usr/share/doc/iptables-cn/examples/ssh-bruteforce \
+ 1>/dev/null 2>&1 || true
+ fi
+ echo "CN: Saving current Netfilter rules to /var/lib/iptables/active"
+ iptables-save > /var/lib/iptables/active
+ fi
fi
+
+# create inactive
if [ ! -e /var/lib/iptables/inactive ]; then
- cp /var/lib/iptables/active /var/lib/iptables/inactive
-fi
+ touch /var/lib/iptables/inactive
+fi
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.