X-Git-Url: http://ftp.carnet.hr/carnet-debian/scm?a=blobdiff_plain;f=debian%2Fpostinst;h=4ac4576ded78f915d048a8178f1ab96602d7f6d8;hb=f6d754fbdb6c95f9ce7c2d2f4166972d70467cb7;hp=9293ede1885d4a05154a7e5ebc9147146a0a3f6a;hpb=f66388755bfa833968437c5a5451c1c04b809587;p=iptables-cn.git

diff --git a/debian/postinst b/debian/postinst
index 9293ede..4ac4576 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -30,30 +30,51 @@ 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
+		/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
+if dpkg -l fail2ban | grep -q '^.i'; 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.