izmjene u postinstu

[iptables-cn.git] / debian / postinst

diff --git a/debian/postinst b/debian/postinst
index d4f3626..246b85f 100755 (executable)
--- a/debian/postinst
+++ b/debian/postinst
@@ -1,61 +1,50 @@
 #!/bin/sh
-# postinst script for bind9-cn
-#
-# see: dh_installdeb(1)
 
 set -e
 
-# summary of how this script can be called:
-#        * <postinst> `configure' <most-recently-configured-version>
-#        * <old-postinst> `abort-upgrade' <new version>
-#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
-#          <new-version>
-#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
-#          <failed-install-package> <version> `removing'
-#          <conflicting-package> <version>
-# for details, see http://www.debian.org/doc/debian-policy/ or
-# the debian-policy package
-#
-
-case "$1" in
-    configure|reconfigure)
-      # continue below
-    ;;
-
-    *)
-        exit 0
-    ;;
-esac
-
-# 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 || true
-fi
+[ "$1" = "configure" ] || exit 0
+[ "$DEBIAN_SCRIPT_DEBUG" ] && set -vx
 
 # remove old iptables init script
 update-rc.d -f iptables remove >/dev/null 2>&1 || true
+update-rc.d -f iptables-cn remove >/dev/null 2>&1 || true
 
-# check if old default file exists and import it
+# check if old default file exists and delete it
+if [ -e /etc/default/iptables-cn ]; then
+    rm -f /etc/default/iptables-cn
+fi
 if [ -e /etc/default/iptables ]; then
-    mv /etc/default/iptables /etc/default/iptables-cn
+    rm -f /etc/default/iptables
 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
-    if ! iptables-save | grep '^-' >/dev/null; then
-        echo "CN: Netfilter rules empty: importing SSH bruteforce rules"
-        . /usr/share/doc/iptables-cn/examples/ssh-bruteforce
+# check to see if fail2ban is installed
+if dpkg-query -f '${Status}' -W fail2ban | grep -q installed; 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 /etc/iptables/rules.v4"
+    iptables-save > /etc/iptables/rules.v4
+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 /etc/iptables/rules.v4 ]; 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 /etc/iptables/rules.v4"
+        iptables-save > /etc/iptables/rules.v4
     fi
-    echo "CN: Saving current Netfilter rules to /var/lib/iptables/active"
-    iptables-save > /var/lib/iptables/active
-fi
-
-# create inactive
-if [ ! -e /var/lib/iptables/inactive ]; then
-    touch /var/lib/iptables/inactive
 fi
 
 # dh_installdeb will replace this with shell code automatically