2 # postinst script for bind9-cn
4 # see: dh_installdeb(1)
8 # summary of how this script can be called:
9 # * <postinst> `configure' <most-recently-configured-version>
10 # * <old-postinst> `abort-upgrade' <new version>
11 # * <conflictor's-postinst> `abort-remove' `in-favour' <package>
13 # * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
14 # <failed-install-package> <version> `removing'
15 # <conflicting-package> <version>
16 # for details, see http://www.debian.org/doc/debian-policy/ or
17 # the debian-policy package
21 configure|reconfigure)
30 # fix problem with permissions from the old package
31 if dpkg --compare-versions "$2" lt "2:1.2.11-4"; then
32 chown -f -Rh root:root /var/lib/iptables /etc/init.d/iptables \
33 /etc/default/iptables >/dev/null 2>&1 || true
36 # remove old iptables init script
37 update-rc.d -f iptables remove >/dev/null 2>&1 || true
39 # check if old default file exists and import it
40 if [ -e /etc/default/iptables ]; then
41 mv /etc/default/iptables /etc/default/iptables-cn
44 # check to see if fail2ban is installed
45 check=(fail2ban fail2ban-cn)
46 check=$(dpkg -s $check 2> /dev/null | egrep '^Package:|^Status:' | awk '{if ($1 ~ /^Package:/) { package=$2 } else if ($0 ~ /^Status: .* installed$/) { print package }}')
47 if [ "x$check" != "x" ]; then
48 echo "CN: Detected Fail2Ban installation, will remove SSH bruteforce rules by default"
49 iptables -D SSH_Brute_Force -m recent ! --rcheck --seconds 90 \
50 --hitcount 3 --name SSH --rsource \
51 -j RETURN >/dev/null 2>&1 || true
52 iptables -D SSH_Brute_Force -p tcp -j REJECT \
53 --reject-with icmp-port-unreachable >/dev/null 2>&1 || true
54 iptables -D INPUT -p tcp -m tcp --dport 22 -m state \
55 --state NEW -m recent --set --name SSH --rsource \
56 -j SSH_Brute_Force >/dev/null 2>&1 || true
57 iptables -X SSH_Brute_Force >/dev/null 2>&1 || true
59 echo "CN: Saving current Netfilter rules to /var/lib/iptables/active"
60 iptables-save > /var/lib/iptables/active
62 # check if there is any default netfilter policy and install default SSH
63 # REJECT recent if there is none..
64 # also, save current set of rules into active and inactive configuration
65 if [ ! -e /var/lib/iptables/active ]; then
66 if ! iptables-save | grep '^-' >/dev/null; then
67 echo "CN: Netfilter rules empty: importing SSH bruteforce rules"
68 /usr/share/doc/iptables-cn/examples/ssh-bruteforce \
69 1>/dev/null 2>&1 || true
71 echo "CN: Saving current Netfilter rules to /var/lib/iptables/active"
72 iptables-save > /var/lib/iptables/active
77 if [ ! -e /var/lib/iptables/inactive ]; then
78 touch /var/lib/iptables/inactive
81 # dh_installdeb will replace this with shell code automatically
82 # generated by other debhelper scripts.