X-Git-Url: http://ftp.carnet.hr/carnet-debian/scm?a=blobdiff_plain;f=debian%2Fpostinst;h=6a57a0dc285a57330e9e0c03619ba75486630451;hb=a34e04407c58606899a68512cf7f259d91dd98c6;hp=81d185d1f9154e53e6bbe5e589370bfeb1fc77e8;hpb=a10ac83218b772a9ded3059d49407869b108bce2;p=iptables-cn.git

diff --git a/debian/postinst b/debian/postinst
index 81d185d..6a57a0d 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -34,26 +34,43 @@ if dpkg --compare-versions "$2" lt "2:1.2.11-4"; then
 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
-    if ! iptables-save | grep '^-' >/dev/null; then
-        echo "CN: Netfilter rules empty: importing SSH bruteforce rules"
-        . /usr/share/doc/iptables-cn/examples/ssh-bruteforce
-    fi
+# 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