minifirewall: embed files instead of git clone
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minifirewall/files/minifirewall
Executable file
385
minifirewall/files/minifirewall
Executable file
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#!/bin/sh
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# minifirewall is shellscripts for easy firewalling on a standalone server
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# we used netfilter/iptables http://netfilter.org/ designed for recent Linux kernel
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# See https://forge.evolix.org/projects/minifirewall
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# Copyright (c) 2007-2015 Evolix
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License.
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# Description
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# script for standalone server
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# Start or stop minifirewall
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#
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### BEGIN INIT INFO
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# Provides: minfirewall
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# Required-Start:
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# Required-Stop:
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# Should-Start: $network $syslog $named
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# Should-Stop: $syslog
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: start and stop the firewall
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# Description: Firewall designed for standalone server
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### END INIT INFO
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DESC="minifirewall"
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NAME="minifirewall"
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# Variables configuration
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#########################
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# iptables paths
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IPT=/sbin/iptables
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IPT6=/sbin/ip6tables
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# TCP/IP variables
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LOOPBACK='127.0.0.0/8'
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CLASSA='10.0.0.0/8'
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CLASSB='172.16.0.0/12'
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CLASSC='192.168.0.0/16'
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CLASSD='224.0.0.0/4'
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CLASSE='240.0.0.0/5'
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ALL='0.0.0.0'
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BROAD='255.255.255.255'
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PORTSROOT='0:1023'
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PORTSUSER='1024:65535'
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case "$1" in
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start)
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echo "Start IPTables rules..."
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# Stop and warn if error!
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set -e
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trap 'echo "ERROR in minifirewall configuration (fix it now!) or script manipulation (fix yourself)." ' INT TERM EXIT
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# sysctl network security settings
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##################################
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# Don't answer to broadcast pings
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echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
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# Ignore bogus ICMP responses
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echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
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# Disable Source Routing
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for i in /proc/sys/net/ipv4/conf/*/accept_source_route; do
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echo 0 > $i
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done
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# Enable TCP SYN cookies to avoid TCP-SYN-FLOOD attacks
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# cf http://cr.yp.to/syncookies.html
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echo 1 > /proc/sys/net/ipv4/tcp_syncookies
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# Disable ICMP redirects
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for i in /proc/sys/net/ipv4/conf/*/accept_redirects; do
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echo 0 > $i
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done
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for i in /proc/sys/net/ipv4/conf/*/send_redirects; do
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echo 0 > $i
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done
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# Enable Reverse Path filtering : verify if responses use same network interface
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for i in /proc/sys/net/ipv4/conf/*/rp_filter; do
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echo 1 > $i
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done
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# log des paquets avec adresse incoherente
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for i in /proc/sys/net/ipv4/conf/*/log_martians; do
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echo 1 > $i
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done
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# IPTables configuration
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########################
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$IPT -N LOG_DROP
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$IPT -A LOG_DROP -j LOG --log-prefix '[IPTABLES DROP] : '
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$IPT -A LOG_DROP -j DROP
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$IPT -N LOG_ACCEPT
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$IPT -A LOG_ACCEPT -j LOG --log-prefix '[IPTABLES ACCEPT] : '
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$IPT -A LOG_ACCEPT -j ACCEPT
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# Configuration
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oldconfigfile="/etc/firewall.rc"
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configfile="/etc/default/minifirewall"
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if test -f $oldconfigfile; then
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echo "$oldconfigfile is deprecated, rename to $configfile" >&2
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exit 1
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fi
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if ! test -f $configfile; then
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echo "$configfile does not exist" >&2
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exit 1
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fi
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tmpfile=`mktemp`
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. $configfile 2>$tmpfile >&2
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if [ -s $tmpfile ]; then
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echo "$configfile returns standard or error output (see below). Stopping." >&2
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cat $tmpfile
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exit 1
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fi
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rm $tmpfile
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# Trusted ip addresses
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$IPT -N ONLYTRUSTED
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$IPT -A ONLYTRUSTED -j LOG_DROP
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for x in $TRUSTEDIPS
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do
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$IPT -I ONLYTRUSTED -s $x -j ACCEPT
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done
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# Privilegied ip addresses
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# (trusted ip addresses *are* privilegied)
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$IPT -N ONLYPRIVILEGIED
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$IPT -A ONLYPRIVILEGIED -j ONLYTRUSTED
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for x in $PRIVILEGIEDIPS
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do
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$IPT -I ONLYPRIVILEGIED -s $x -j ACCEPT
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done
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# Chain for restrictions (blacklist IPs/ranges)
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$IPT -N NEEDRESTRICT
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# We allow all on loopback interface
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$IPT -A INPUT -i lo -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A INPUT -i lo -j ACCEPT
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# if OUTPUTDROP
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$IPT -A OUTPUT -o lo -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -o lo -j ACCEPT
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# We avoid "martians" packets, typical when W32/Blaster virus
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# attacked windowsupdate.com and DNS was changed to 127.0.0.1
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# $IPT -t NAT -I PREROUTING -s $LOOPBACK -i ! lo -j DROP
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$IPT -A INPUT -s $LOOPBACK ! -i lo -j DROP
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# Local services restrictions
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#############################
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# Allow services for $INTLAN (local server or local network)
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$IPT -A INPUT -s $INTLAN -j ACCEPT
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# Enable protection chain for sensible services
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for x in $SERVICESTCP1p
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do
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$IPT -A INPUT -p tcp --dport $x -j NEEDRESTRICT
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done
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for x in $SERVICESUDP1p
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do
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$IPT -A INPUT -p udp --dport $x -j NEEDRESTRICT
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done
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# Public service
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for x in $SERVICESTCP1
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do
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$IPT -A INPUT -p tcp --dport $x -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A INPUT -p tcp --dport $x -j ACCEPT
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done
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for x in $SERVICESUDP1
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do
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$IPT -A INPUT -p udp --dport $x -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A INPUT -p udp --dport $x -j ACCEPT
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done
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# Privilegied services
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for x in $SERVICESTCP2
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do
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$IPT -A INPUT -p tcp --dport $x -j ONLYPRIVILEGIED
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done
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for x in $SERVICESUDP2
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do
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$IPT -A INPUT -p udp --dport $x -j ONLYPRIVILEGIED
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done
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# Private services
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for x in $SERVICESTCP3
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do
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$IPT -A INPUT -p tcp --dport $x -j ONLYTRUSTED
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done
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for x in $SERVICESUDP3
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do
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$IPT -A INPUT -p udp --dport $x -j ONLYTRUSTED
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done
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# External services
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###################
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# DNS authorizations
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for x in $DNSSERVEURS
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do
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$IPT -A INPUT -p tcp ! --syn --sport 53 --dport $PORTSUSER -s $x -j ACCEPT
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$IPT -A INPUT -p udp --sport 53 --dport $PORTSUSER -s $x -m state --state ESTABLISHED,RELATED -j ACCEPT
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$IPT -A OUTPUT -o $INT -p udp -d $x --dport 53 --match state --state NEW -j ACCEPT
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done
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# HTTP (TCP/80) authorizations
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for x in $HTTPSITES
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do
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$IPT -A INPUT -p tcp ! --syn --sport 80 --dport $PORTSUSER -s $x -j ACCEPT
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done
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# HTTPS (TCP/443) authorizations
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for x in $HTTPSSITES
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do
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$IPT -A INPUT -p tcp ! --syn --sport 443 --dport $PORTSUSER -s $x -j ACCEPT
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done
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# FTP (so complex protocol...) authorizations
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for x in $FTPSITES
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do
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# requests on Control connection
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$IPT -A INPUT -p tcp ! --syn --sport 21 --dport $PORTSUSER -s $x -j ACCEPT
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# FTP port-mode on Data Connection
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$IPT -A INPUT -p tcp --sport 20 --dport $PORTSUSER -s $x -j ACCEPT
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# FTP passive-mode on Data Connection
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# WARNING, this allow all connections on TCP ports > 1024
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$IPT -A INPUT -p tcp ! --syn --sport $PORTSUSER --dport $PORTSUSER -s $x -j ACCEPT
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done
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# SSH authorizations
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for x in $SSHOK
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do
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$IPT -A INPUT -p tcp ! --syn --sport 22 -s $x -j ACCEPT
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done
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# SMTP authorizations
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for x in $SMTPOK
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do
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$IPT -A INPUT -p tcp ! --syn --sport 25 --dport $PORTSUSER -j ACCEPT
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done
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# secure SMTP (TCP/465 et TCP/587) authorizations
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for x in $SMTPSECUREOK
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do
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$IPT -A INPUT -p tcp ! --syn --sport 465 --dport $PORTSUSER -j ACCEPT
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$IPT -A INPUT -p tcp ! --syn --sport 587 --dport $PORTSUSER -j ACCEPT
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done
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# NTP authorizations
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for x in $NTPOK
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do
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$IPT -A INPUT -p udp --sport 123 -s $x -j ACCEPT
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$IPT -A OUTPUT -o $INT -p udp -d $x --dport 123 --match state --state NEW -j ACCEPT
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done
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# Always allow ICMP
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$IPT -A INPUT -p icmp -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A INPUT -p icmpv6 -j ACCEPT
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# IPTables policy
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#################
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# by default DROP INPUT packets
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$IPT -P INPUT DROP
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[ "$IPV6" != "off" ] && $IPT6 -P INPUT DROP
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# by default, no FORWARING (deprecated for Virtual Machines)
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#echo 0 > /proc/sys/net/ipv4/ip_forward
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#$IPT -P FORWARD DROP
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#$IPT6 -P FORWARD DROP
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# by default allow OUTPUT packets... but drop UDP packets (see OUTPUTDROP to drop OUTPUT packets)
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$IPT -P OUTPUT ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -P OUTPUT ACCEPT
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$IPT -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
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$IPT -A OUTPUT -p udp --match state --state ESTABLISHED,RELATED -j ACCEPT
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$IPT -A OUTPUT -p udp -j DROP
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[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -p udp --match state --state ESTABLISHED,RELATED -j ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -p udp -j DROP
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trap - INT TERM EXIT
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echo "...starting IPTables rules is now finish : OK"
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;;
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stop)
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echo "Flush all rules and accept everything..."
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# Delete all rules
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$IPT -F INPUT
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$IPT -F OUTPUT
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$IPT -F LOG_DROP
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$IPT -F LOG_ACCEPT
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$IPT -F ONLYTRUSTED
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$IPT -F ONLYPRIVILEGIED
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$IPT -F NEEDRESTRICT
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$IPT -t nat -F
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$IPT -t mangle -F
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[ "$IPV6" != "off" ] && $IPT6 -F INPUT
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[ "$IPV6" != "off" ] && $IPT6 -F OUTPUT
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# Accept all
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$IPT -P INPUT ACCEPT
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$IPT -P OUTPUT ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -P INPUT ACCEPT
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[ "$IPV6" != "off" ] && $IPT6 -P OUTPUT ACCEPT
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#$IPT -P FORWARD ACCEPT
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#$IPT -t nat -P PREROUTING ACCEPT
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#$IPT -t nat -P POSTROUTING ACCEPT
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# Delete non-standard chains
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$IPT -X LOG_DROP
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$IPT -X LOG_ACCEPT
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$IPT -X ONLYPRIVILEGIED
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$IPT -X ONLYTRUSTED
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$IPT -X NEEDRESTRICT
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echo "...flushing IPTables rules is now finish : OK"
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;;
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status)
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$IPT -L -n -v --line-numbers
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$IPT -t nat -L -n -v --line-numbers
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$IPT -t mangle -L -n -v --line-numbers
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$IPT6 -L -n -v --line-numbers
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$IPT6 -t mangle -L -n -v --line-numbers
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;;
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reset)
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echo "Reset all IPTables counters..."
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$IPT -Z
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$IPT -t nat -Z
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$IPT -t mangle -Z
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[ "$IPV6" != "off" ] && $IPT6 -Z
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[ "$IPV6" != "off" ] && $IPT6 -t mangle -Z
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echo "...reseting IPTables counters is now finish : OK"
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;;
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restart)
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$0 stop
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$0 start
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;;
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*)
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echo "Usage: $0 {start|stop|restart|status|reset|squid}"
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exit 1
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esac
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exit 0
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99
minifirewall/files/minifirewall.conf
Normal file
99
minifirewall/files/minifirewall.conf
Normal file
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@ -0,0 +1,99 @@
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# Configuration for minifirewall : https://forge.evolix.org/projects/minifirewall
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# For fun, we keep last change from first CVS repository:
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# version 0.1 - 12 juillet 2007 $Id: firewall.rc,v 1.2 2007/07/12 19:08:59 reg Exp $
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# Main interface
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INT='eth0'
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# IPv6
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IPV6=on
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# Trusted IPv4 local network
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# ...will be often IP/32 if you don't trust anything
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INTLAN='192.168.0.2/32'
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# Trusted IPv4 addresses for private and semi-public services
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TRUSTEDIPS='62.212.121.90 88.179.18.233 31.170.8.4 31.170.9.129'
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# Privilegied IPv4 addresses for semi-public services
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# (no need to add again TRUSTEDIPS)
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PRIVILEGIEDIPS=''
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# Local services IPv4/IPv6 restrictions
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#######################################
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# Protected services
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# (add also in Public services if needed)
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SERVICESTCP1p='22'
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SERVICESUDP1p=''
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# Public services (IPv4/IPv6)
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SERVICESTCP1='25 53 443 993 995 2222'
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SERVICESUDP1='53'
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# Semi-public services (IPv4)
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SERVICESTCP2='20 21 22 80 110 143'
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SERVICESUDP2=''
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# Private services (IPv4)
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SERVICESTCP3='5666'
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SERVICESUDP3=''
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# Standard output IPv4 access restrictions
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##########################################
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# DNS authorizations
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# (if you have local DNS server, set 0.0.0.0/0)
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DNSSERVEURS='0.0.0.0/0'
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# HTTP authorizations
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# (you can use DNS names but set cron to reload minifirewall regularly)
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# (if you have HTTP proxy, set 0.0.0.0/0)
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HTTPSITES='security.debian.org pub.evolix.net volatile.debian.org mirror.evolix.org backports.debian.org hwraid.le-vert.net zidane.evolix.net antispam00.evolix.org spamassassin.apache.org sa-update.space-pro.be sa-update.secnap.net www.sa-update.pccc.com sa-update.dnswl.org'
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# HTTPS authorizations
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HTTPSSITES='0.0.0.0/0'
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# FTP authorizations
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FTPSITES=''
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# SSH authorizations
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SSHOK='0.0.0.0/0'
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# SMTP authorizations
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SMTPOK='0.0.0.0/0'
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# SMTP secure authorizations (ports TCP/465 and TCP/587)
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SMTPSECUREOK=''
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# NTP authorizations
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NTPOK='0.0.0.0/0'
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# IPv6 Specific rules
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#####################
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# Example: allow SSH from Trusted IPv6 addresses
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/sbin/ip6tables -A INPUT -i $INT -p tcp --dport 22 -s 2a01:9500:37:129::/64 -j ACCEPT
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# Example: allow input HTTP/HTTPS/SMTP/DNS traffic
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/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 80 --match state --state ESTABLISHED,RELATED -j ACCEPT
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/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 443 --match state --state ESTABLISHED,RELATED -j ACCEPT
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||||
/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 25 --match state --state ESTABLISHED,RELATED -j ACCEPT
|
||||
/sbin/ip6tables -A INPUT -i $INT -p udp --sport 53 --match state --state ESTABLISHED,RELATED -j ACCEPT
|
||||
/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 53 --match state --state ESTABLISHED,RELATED -j ACCEPT
|
||||
|
||||
# Example: allow output DNS, NTP and traceroute traffic
|
||||
/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 53 --match state --state NEW -j ACCEPT
|
||||
/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 123 --match state --state NEW -j ACCEPT
|
||||
#/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
|
||||
|
||||
# Example: allow DHCPv6
|
||||
/sbin/ip6tables -A INPUT -i $INT -p udp --dport 546 -d fe80::/64 -j ACCEPT
|
||||
/sbin/ip6tables -A OUTPUT -o $INT -p udp --dport 547 -j ACCEPT
|
||||
|
||||
# IPv4 Specific rules
|
||||
#####################
|
||||
|
||||
# /sbin/iptables ...
|
||||
|
|
@ -1,37 +1,19 @@
|
|||
---
|
||||
|
||||
- name: clone git repository
|
||||
git:
|
||||
repo: "{{ minifirewall_git_url}}"
|
||||
dest: "{{ minifirewall_checkout_path }}"
|
||||
clone: yes
|
||||
|
||||
# WARN: these tasks copy the file if there are not already there
|
||||
# They don't update files.
|
||||
|
||||
- name: is init script present?
|
||||
stat:
|
||||
path: /etc/init.d/minifirewall
|
||||
check_mode: no
|
||||
register: init_minifirewall
|
||||
|
||||
- name: init script is copied
|
||||
command: "cp {{ minifirewall_checkout_path }}/minifirewall /etc/init.d/minifirewall"
|
||||
when: not init_minifirewall.stat.exists
|
||||
|
||||
|
||||
- name: is configuration present?
|
||||
stat:
|
||||
path: /etc/default/minifirewall
|
||||
check_mode: no
|
||||
register: default_minifirewall
|
||||
copy:
|
||||
src: minifirewall
|
||||
dest: /etc/init.d/minifirewall
|
||||
force: no
|
||||
mode: "0700"
|
||||
owner: root
|
||||
group: root
|
||||
|
||||
- name: configuration is copied
|
||||
command: "cp {{ minifirewall_checkout_path }}/minifirewall.conf /etc/default/minifirewall"
|
||||
when: not default_minifirewall.stat.exists
|
||||
|
||||
- name: fix configuration rights
|
||||
file:
|
||||
path: /etc/default/minifirewall
|
||||
copy:
|
||||
src: minifirewall.conf
|
||||
dest: /etc/default/minifirewall
|
||||
force: no
|
||||
mode: "0600"
|
||||
state: file
|
||||
owner: root
|
||||
group: root
|
||||
|
|
|
|||
Loading…
Reference in a new issue