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10
README.md
10
README.md
|
@ -2,13 +2,15 @@ Minifirewall
|
||||||
=========
|
=========
|
||||||
|
|
||||||
Minifirewall is shellscripts for easy firewalling on a standalone server
|
Minifirewall is shellscripts for easy firewalling on a standalone server
|
||||||
we used netfilter/iptables http://netfilter.org/ designed for recent Linux kernel
|
we used nftables https://wiki.nftables.org/ designed for recent Linux kernel
|
||||||
See https://gitea.evolix.org/evolix/minifirewall
|
See https://gitea.evolix.org/evolix/minifirewall
|
||||||
|
|
||||||
## Install
|
## Install
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||||||
|
|
||||||
~~~
|
~~~
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||||||
install -m 0700 minifirewall /etc/init.d/minifirewall
|
install -m 0700 minifirewall.service /etc/systemd/system/minifirewall.service
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||||||
|
install -m 0700 minifirewall-start.sh /usr/local/sbin/minifirewall-start.sh
|
||||||
|
install -m 0700 minifirewall-stop.sh /usr/local/sbin/minifirewall-stop.sh
|
||||||
install -m 0600 minifirewall.conf /etc/default/minifirewall
|
install -m 0600 minifirewall.conf /etc/default/minifirewall
|
||||||
~~~
|
~~~
|
||||||
|
|
||||||
|
@ -17,19 +19,17 @@ install -m 0600 minifirewall.conf /etc/default/minifirewall
|
||||||
Edit /etc/default/minifirewall file:
|
Edit /etc/default/minifirewall file:
|
||||||
|
|
||||||
* If your interface is not _eth0_, change *INT* variable
|
* If your interface is not _eth0_, change *INT* variable
|
||||||
* If you don't IPv6 : *IPv6=off*
|
|
||||||
* Modify *INTLAN* variable, probably with your *IP/32* or your local network if you trust it
|
* Modify *INTLAN* variable, probably with your *IP/32* or your local network if you trust it
|
||||||
* Set your trusted and privilegied IP addresses in *TRUSTEDIPS* and *PRIVILEGIEDIPS* variables
|
* Set your trusted and privilegied IP addresses in *TRUSTEDIPS* and *PRIVILEGIEDIPS* variables
|
||||||
* Authorize your +public+ services with *SERVICESTCP1* and *SERVICESUDP1* variables
|
* Authorize your +public+ services with *SERVICESTCP1* and *SERVICESUDP1* variables
|
||||||
* Authorize your +semi-public+ services (only for *TRUSTEDIPS* and *PRIVILEGIEDIPS* ) with *SERVICESTCP2* and *SERVICESUDP2* variables
|
* Authorize your +semi-public+ services (only for *TRUSTEDIPS* and *PRIVILEGIEDIPS* ) with *SERVICESTCP2* and *SERVICESUDP2* variables
|
||||||
* Authorize your +private+ services (only for *TRUSTEDIPS* ) with *SERVICESTCP3* and *SERVICESUDP3* variables
|
* Authorize your +private+ services (only for *TRUSTEDIPS* ) with *SERVICESTCP3* and *SERVICESUDP3* variables
|
||||||
* Configure your authorizations for external services : DNS, HTTP, HTTPS, SMTP, SSH, NTP
|
* Configure your authorizations for external services : DNS, HTTP, HTTPS, SMTP, SSH, NTP
|
||||||
* Add your specific rules
|
|
||||||
|
|
||||||
## Usage
|
## Usage
|
||||||
|
|
||||||
~~~
|
~~~
|
||||||
/etc/init.d/minifirewall start/stop/restart
|
systemctl start/stop/restart minifirewall.service
|
||||||
~~~
|
~~~
|
||||||
|
|
||||||
If you want to add minifirewall in boot sequence:
|
If you want to add minifirewall in boot sequence:
|
||||||
|
|
|
@ -1,5 +1,6 @@
|
||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
|
|
||||||
|
NFT=/usr/sbin/nft
|
||||||
ripedeny_file=/var/tmp/ripe_deny
|
ripedeny_file=/var/tmp/ripe_deny
|
||||||
|
|
||||||
cd /var/tmp
|
cd /var/tmp
|
||||||
|
@ -10,14 +11,10 @@ GET http://antispam00.evolix.org/spam/ripe.cidr.md5 > ripe.cidr.md5
|
||||||
GET http://antispam00.evolix.org/spam/ripe.cidr > ripe.cidr
|
GET http://antispam00.evolix.org/spam/ripe.cidr > ripe.cidr
|
||||||
|
|
||||||
for i in CN KR RU; do
|
for i in CN KR RU; do
|
||||||
|
|
||||||
grep "^$i|" ripe.cidr >> $ripedeny_file
|
grep "^$i|" ripe.cidr >> $ripedeny_file
|
||||||
|
|
||||||
done
|
done
|
||||||
|
|
||||||
/sbin/iptables -F NEEDRESTRICT
|
|
||||||
|
|
||||||
for i in $(cat $ripedeny_file); do
|
for i in $(cat $ripedeny_file); do
|
||||||
BLOCK=$(echo $i | cut -d"|" -f2)
|
BLOCK=$(echo $i | cut -d"|" -f2)
|
||||||
/sbin/iptables -I NEEDRESTRICT -s $BLOCK -j DROP
|
$NFT add element inet minifirewall minifirewall_blocked_ips {$BLOCK}
|
||||||
done
|
done
|
||||||
|
|
492
minifirewall
492
minifirewall
|
@ -1,492 +0,0 @@
|
||||||
#!/bin/sh
|
|
||||||
|
|
||||||
# minifirewall is shellscripts for easy firewalling on a standalone server
|
|
||||||
# we used netfilter/iptables http://netfilter.org/ designed for recent Linux kernel
|
|
||||||
# See https://gitea.evolix.org/evolix/minifirewall
|
|
||||||
|
|
||||||
# Copyright (c) 2007-2015 Evolix
|
|
||||||
# This program is free software; you can redistribute it and/or
|
|
||||||
# modify it under the terms of the GNU General Public License
|
|
||||||
# as published by the Free Software Foundation; either version 3
|
|
||||||
# of the License.
|
|
||||||
|
|
||||||
# Description
|
|
||||||
# script for standalone server
|
|
||||||
|
|
||||||
# Start or stop minifirewall
|
|
||||||
#
|
|
||||||
|
|
||||||
### BEGIN INIT INFO
|
|
||||||
# Provides: minfirewall
|
|
||||||
# Required-Start:
|
|
||||||
# Required-Stop:
|
|
||||||
# Should-Start: $network $syslog $named
|
|
||||||
# Should-Stop: $syslog
|
|
||||||
# Default-Start: 2 3 4 5
|
|
||||||
# Default-Stop: 0 1 6
|
|
||||||
# Short-Description: start and stop the firewall
|
|
||||||
# Description: Firewall designed for standalone server
|
|
||||||
### END INIT INFO
|
|
||||||
|
|
||||||
DESC="minifirewall"
|
|
||||||
NAME="minifirewall"
|
|
||||||
|
|
||||||
|
|
||||||
# Variables configuration
|
|
||||||
#########################
|
|
||||||
|
|
||||||
# iptables paths
|
|
||||||
IPT=/sbin/iptables
|
|
||||||
IPT6=/sbin/ip6tables
|
|
||||||
|
|
||||||
# TCP/IP variables
|
|
||||||
LOOPBACK='127.0.0.0/8'
|
|
||||||
CLASSA='10.0.0.0/8'
|
|
||||||
CLASSB='172.16.0.0/12'
|
|
||||||
CLASSC='192.168.0.0/16'
|
|
||||||
CLASSD='224.0.0.0/4'
|
|
||||||
CLASSE='240.0.0.0/5'
|
|
||||||
ALL='0.0.0.0'
|
|
||||||
BROAD='255.255.255.255'
|
|
||||||
PORTSROOT='0:1023'
|
|
||||||
PORTSUSER='1024:65535'
|
|
||||||
|
|
||||||
chain_exists()
|
|
||||||
{
|
|
||||||
local chain_name="$1" ; shift
|
|
||||||
[ $# -eq 1 ] && local intable="--table $1"
|
|
||||||
iptables $intable -nL "$chain_name" >/dev/null 2>&1
|
|
||||||
}
|
|
||||||
|
|
||||||
# Configuration
|
|
||||||
oldconfigfile="/etc/firewall.rc"
|
|
||||||
configfile="/etc/default/minifirewall"
|
|
||||||
|
|
||||||
IPV6=$(grep "IPV6=" /etc/default/minifirewall | awk -F '=' -F "'" '{print $2}')
|
|
||||||
DOCKER=$(grep "DOCKER=" /etc/default/minifirewall | awk -F '=' -F "'" '{print $2}')
|
|
||||||
INT=$(grep "INT=" /etc/default/minifirewall | awk -F '=' -F "'" '{print $2}')
|
|
||||||
|
|
||||||
case "$1" in
|
|
||||||
start)
|
|
||||||
|
|
||||||
echo "Start IPTables rules..."
|
|
||||||
|
|
||||||
# Stop and warn if error!
|
|
||||||
set -e
|
|
||||||
trap 'echo "ERROR in minifirewall configuration (fix it now!) or script manipulation (fix yourself)." ' INT TERM EXIT
|
|
||||||
|
|
||||||
|
|
||||||
# sysctl network security settings
|
|
||||||
##################################
|
|
||||||
|
|
||||||
# Don't answer to broadcast pings
|
|
||||||
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
|
|
||||||
|
|
||||||
# Ignore bogus ICMP responses
|
|
||||||
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
|
|
||||||
|
|
||||||
# Disable Source Routing
|
|
||||||
for i in /proc/sys/net/ipv4/conf/*/accept_source_route; do
|
|
||||||
echo 0 > $i
|
|
||||||
done
|
|
||||||
|
|
||||||
# Enable TCP SYN cookies to avoid TCP-SYN-FLOOD attacks
|
|
||||||
# cf http://cr.yp.to/syncookies.html
|
|
||||||
echo 1 > /proc/sys/net/ipv4/tcp_syncookies
|
|
||||||
|
|
||||||
# Disable ICMP redirects
|
|
||||||
for i in /proc/sys/net/ipv4/conf/*/accept_redirects; do
|
|
||||||
echo 0 > $i
|
|
||||||
done
|
|
||||||
|
|
||||||
for i in /proc/sys/net/ipv4/conf/*/send_redirects; do
|
|
||||||
echo 0 > $i
|
|
||||||
done
|
|
||||||
|
|
||||||
# Enable Reverse Path filtering : verify if responses use same network interface
|
|
||||||
for i in /proc/sys/net/ipv4/conf/*/rp_filter; do
|
|
||||||
echo 1 > $i
|
|
||||||
done
|
|
||||||
|
|
||||||
# log des paquets avec adresse incoherente
|
|
||||||
for i in /proc/sys/net/ipv4/conf/*/log_martians; do
|
|
||||||
echo 1 > $i
|
|
||||||
done
|
|
||||||
|
|
||||||
# IPTables configuration
|
|
||||||
########################
|
|
||||||
|
|
||||||
$IPT -N LOG_DROP
|
|
||||||
$IPT -A LOG_DROP -j LOG --log-prefix '[IPTABLES DROP] : '
|
|
||||||
$IPT -A LOG_DROP -j DROP
|
|
||||||
$IPT -N LOG_ACCEPT
|
|
||||||
$IPT -A LOG_ACCEPT -j LOG --log-prefix '[IPTABLES ACCEPT] : '
|
|
||||||
$IPT -A LOG_ACCEPT -j ACCEPT
|
|
||||||
|
|
||||||
if test -f $oldconfigfile; then
|
|
||||||
echo "$oldconfigfile is deprecated, rename to $configfile" >&2
|
|
||||||
exit 1
|
|
||||||
fi
|
|
||||||
|
|
||||||
if ! test -f $configfile; then
|
|
||||||
echo "$configfile does not exist" >&2
|
|
||||||
exit 1
|
|
||||||
fi
|
|
||||||
|
|
||||||
tmpfile=`mktemp`
|
|
||||||
. $configfile 2>$tmpfile >&2
|
|
||||||
if [ -s $tmpfile ]; then
|
|
||||||
echo "$configfile returns standard or error output (see below). Stopping." >&2
|
|
||||||
cat $tmpfile
|
|
||||||
exit 1
|
|
||||||
fi
|
|
||||||
rm $tmpfile
|
|
||||||
|
|
||||||
# Trusted ip addresses
|
|
||||||
$IPT -N ONLYTRUSTED
|
|
||||||
$IPT -A ONLYTRUSTED -j LOG_DROP
|
|
||||||
for x in $TRUSTEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I ONLYTRUSTED -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# Privilegied ip addresses
|
|
||||||
# (trusted ip addresses *are* privilegied)
|
|
||||||
$IPT -N ONLYPRIVILEGIED
|
|
||||||
$IPT -A ONLYPRIVILEGIED -j ONLYTRUSTED
|
|
||||||
for x in $PRIVILEGIEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I ONLYPRIVILEGIED -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# Chain for restrictions (blacklist IPs/ranges)
|
|
||||||
$IPT -N NEEDRESTRICT
|
|
||||||
|
|
||||||
# We allow all on loopback interface
|
|
||||||
$IPT -A INPUT -i lo -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A INPUT -i lo -j ACCEPT
|
|
||||||
# if OUTPUTDROP
|
|
||||||
$IPT -A OUTPUT -o lo -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -o lo -j ACCEPT
|
|
||||||
|
|
||||||
# We avoid "martians" packets, typical when W32/Blaster virus
|
|
||||||
# attacked windowsupdate.com and DNS was changed to 127.0.0.1
|
|
||||||
# $IPT -t NAT -I PREROUTING -s $LOOPBACK -i ! lo -j DROP
|
|
||||||
$IPT -A INPUT -s $LOOPBACK ! -i lo -j DROP
|
|
||||||
|
|
||||||
|
|
||||||
if [ "$DOCKER" = "on" ]; then
|
|
||||||
|
|
||||||
$IPT -N MINIFW-DOCKER-TRUSTED
|
|
||||||
$IPT -A MINIFW-DOCKER-TRUSTED -j DROP
|
|
||||||
|
|
||||||
$IPT -N MINIFW-DOCKER-PRIVILEGED
|
|
||||||
$IPT -A MINIFW-DOCKER-PRIVILEGED -j MINIFW-DOCKER-TRUSTED
|
|
||||||
$IPT -A MINIFW-DOCKER-PRIVILEGED -j RETURN
|
|
||||||
|
|
||||||
$IPT -N MINIFW-DOCKER-PUB
|
|
||||||
$IPT -A MINIFW-DOCKER-PUB -j MINIFW-DOCKER-PRIVILEGED
|
|
||||||
$IPT -A MINIFW-DOCKER-PUB -j RETURN
|
|
||||||
|
|
||||||
# Flush DOCKER-USER if exist, create it if absent
|
|
||||||
if chain_exists 'DOCKER-USER'; then
|
|
||||||
$IPT -F DOCKER-USER
|
|
||||||
else
|
|
||||||
$IPT -N DOCKER-USER
|
|
||||||
fi;
|
|
||||||
|
|
||||||
# Pipe new connection through MINIFW-DOCKER-PUB
|
|
||||||
$IPT -A DOCKER-USER -i $INT -m state --state NEW -j MINIFW-DOCKER-PUB
|
|
||||||
$IPT -A DOCKER-USER -j RETURN
|
|
||||||
|
|
||||||
fi
|
|
||||||
|
|
||||||
|
|
||||||
# Local services restrictions
|
|
||||||
#############################
|
|
||||||
|
|
||||||
# Allow services for $INTLAN (local server or local network)
|
|
||||||
$IPT -A INPUT -s $INTLAN -j ACCEPT
|
|
||||||
|
|
||||||
# Enable protection chain for sensible services
|
|
||||||
for x in $SERVICESTCP1p
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp --dport $x -j NEEDRESTRICT
|
|
||||||
done
|
|
||||||
|
|
||||||
for x in $SERVICESUDP1p
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p udp --dport $x -j NEEDRESTRICT
|
|
||||||
done
|
|
||||||
|
|
||||||
# Public service
|
|
||||||
for x in $SERVICESTCP1
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp --dport $x -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A INPUT -p tcp --dport $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
for x in $SERVICESUDP1
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p udp --dport $x -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A INPUT -p udp --dport $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# Privilegied services
|
|
||||||
for x in $SERVICESTCP2
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp --dport $x -j ONLYPRIVILEGIED
|
|
||||||
done
|
|
||||||
|
|
||||||
for x in $SERVICESUDP2
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p udp --dport $x -j ONLYPRIVILEGIED
|
|
||||||
done
|
|
||||||
|
|
||||||
# Private services
|
|
||||||
for x in $SERVICESTCP3
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp --dport $x -j ONLYTRUSTED
|
|
||||||
done
|
|
||||||
|
|
||||||
for x in $SERVICESUDP3
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p udp --dport $x -j ONLYTRUSTED
|
|
||||||
done
|
|
||||||
|
|
||||||
|
|
||||||
if [ "$DOCKER" = "on" ]; then
|
|
||||||
|
|
||||||
# Public services defined in SERVICESTCP1 & SERVICESUDP1
|
|
||||||
for dstport in $SERVICESTCP1
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-PUB -p tcp --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
|
|
||||||
for dstport in $SERVICESUDP1
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-PUB -p udp --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
|
|
||||||
# Privileged services (accessible from privileged & trusted IPs)
|
|
||||||
for dstport in $SERVICESTCP2
|
|
||||||
do
|
|
||||||
for srcip in $PRIVILEGIEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-PRIVILEGED -p tcp -s "$srcip" --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
|
|
||||||
for srcip in $TRUSTEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-PRIVILEGED -p tcp -s "$srcip" --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
done
|
|
||||||
|
|
||||||
for dstport in $SERVICESUDP2
|
|
||||||
do
|
|
||||||
for srcip in $PRIVILEGIEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-PRIVILEGED -p udp -s "$srcip" --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
|
|
||||||
for srcip in $TRUSTEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-PRIVILEGED -p udp -s "$srcip" --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
done
|
|
||||||
|
|
||||||
# Trusted services (accessible from trusted IPs)
|
|
||||||
for dstport in $SERVICESTCP3
|
|
||||||
do
|
|
||||||
for srcip in $TRUSTEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-TRUSTED -p tcp -s "$srcip" --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
done
|
|
||||||
|
|
||||||
for dstport in $SERVICESUDP3
|
|
||||||
do
|
|
||||||
for srcip in $TRUSTEDIPS
|
|
||||||
do
|
|
||||||
$IPT -I MINIFW-DOCKER-TRUSTED -p udp -s "$srcip" --dport "$dstport" -j RETURN
|
|
||||||
done
|
|
||||||
done
|
|
||||||
fi
|
|
||||||
|
|
||||||
# External services
|
|
||||||
###################
|
|
||||||
|
|
||||||
# DNS authorizations
|
|
||||||
for x in $DNSSERVEURS
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 53 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
$IPT -A INPUT -p udp --sport 53 --dport $PORTSUSER -s $x -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
||||||
$IPT -A OUTPUT -o $INT -p udp -d $x --dport 53 --match state --state NEW -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# HTTP (TCP/80) authorizations
|
|
||||||
for x in $HTTPSITES
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 80 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# HTTPS (TCP/443) authorizations
|
|
||||||
for x in $HTTPSSITES
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 443 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# FTP (so complex protocol...) authorizations
|
|
||||||
for x in $FTPSITES
|
|
||||||
do
|
|
||||||
# requests on Control connection
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 21 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
# FTP port-mode on Data Connection
|
|
||||||
$IPT -A INPUT -p tcp --sport 20 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
# FTP passive-mode on Data Connection
|
|
||||||
# WARNING, this allow all connections on TCP ports > 1024
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport $PORTSUSER --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# SSH authorizations
|
|
||||||
for x in $SSHOK
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 22 -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# SMTP authorizations
|
|
||||||
for x in $SMTPOK
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 25 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# secure SMTP (TCP/465 et TCP/587) authorizations
|
|
||||||
for x in $SMTPSECUREOK
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 465 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
$IPT -A INPUT -p tcp ! --syn --sport 587 --dport $PORTSUSER -s $x -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# NTP authorizations
|
|
||||||
for x in $NTPOK
|
|
||||||
do
|
|
||||||
$IPT -A INPUT -p udp --sport 123 -s $x -j ACCEPT
|
|
||||||
$IPT -A OUTPUT -o $INT -p udp -d $x --dport 123 --match state --state NEW -j ACCEPT
|
|
||||||
done
|
|
||||||
|
|
||||||
# Always allow ICMP
|
|
||||||
$IPT -A INPUT -p icmp -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A INPUT -p icmpv6 -j ACCEPT
|
|
||||||
|
|
||||||
|
|
||||||
# IPTables policy
|
|
||||||
#################
|
|
||||||
|
|
||||||
# by default DROP INPUT packets
|
|
||||||
$IPT -P INPUT DROP
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -P INPUT DROP
|
|
||||||
|
|
||||||
# by default, no FORWARING (deprecated for Virtual Machines)
|
|
||||||
#echo 0 > /proc/sys/net/ipv4/ip_forward
|
|
||||||
#$IPT -P FORWARD DROP
|
|
||||||
#$IPT6 -P FORWARD DROP
|
|
||||||
|
|
||||||
# by default allow OUTPUT packets... but drop UDP packets (see OUTPUTDROP to drop OUTPUT packets)
|
|
||||||
$IPT -P OUTPUT ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -P OUTPUT ACCEPT
|
|
||||||
$IPT -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
|
|
||||||
$IPT -A OUTPUT -p udp --match state --state ESTABLISHED,RELATED -j ACCEPT
|
|
||||||
$IPT -A OUTPUT -p udp -j DROP
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -o $INT -p udp --dport 33434:33523 --match state --state NEW -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -p udp --match state --state ESTABLISHED,RELATED -j ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -A OUTPUT -p udp -j DROP
|
|
||||||
|
|
||||||
trap - INT TERM EXIT
|
|
||||||
|
|
||||||
echo "...starting IPTables rules is now finish : OK"
|
|
||||||
;;
|
|
||||||
|
|
||||||
stop)
|
|
||||||
|
|
||||||
echo "Flush all rules and accept everything..."
|
|
||||||
|
|
||||||
# Delete all rules
|
|
||||||
$IPT -F INPUT
|
|
||||||
$IPT -F OUTPUT
|
|
||||||
$IPT -F LOG_DROP
|
|
||||||
$IPT -F LOG_ACCEPT
|
|
||||||
$IPT -F ONLYTRUSTED
|
|
||||||
$IPT -F ONLYPRIVILEGIED
|
|
||||||
$IPT -F NEEDRESTRICT
|
|
||||||
[ "$DOCKER" = "off" ] && $IPT -t nat -F
|
|
||||||
$IPT -t mangle -F
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -F INPUT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -F OUTPUT
|
|
||||||
|
|
||||||
if [ "$DOCKER" = "on" ]; then
|
|
||||||
$IPT -F DOCKER-USER
|
|
||||||
$IPT -A DOCKER-USER -j RETURN
|
|
||||||
|
|
||||||
$IPT -F MINIFW-DOCKER-PUB
|
|
||||||
$IPT -X MINIFW-DOCKER-PUB
|
|
||||||
$IPT -F MINIFW-DOCKER-PRIVILEGED
|
|
||||||
$IPT -X MINIFW-DOCKER-PRIVILEGED
|
|
||||||
$IPT -F MINIFW-DOCKER-TRUSTED
|
|
||||||
$IPT -X MINIFW-DOCKER-TRUSTED
|
|
||||||
|
|
||||||
fi
|
|
||||||
|
|
||||||
# Accept all
|
|
||||||
$IPT -P INPUT ACCEPT
|
|
||||||
$IPT -P OUTPUT ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -P INPUT ACCEPT
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -P OUTPUT ACCEPT
|
|
||||||
#$IPT -P FORWARD ACCEPT
|
|
||||||
#$IPT -t nat -P PREROUTING ACCEPT
|
|
||||||
#$IPT -t nat -P POSTROUTING ACCEPT
|
|
||||||
|
|
||||||
# Delete non-standard chains
|
|
||||||
$IPT -X LOG_DROP
|
|
||||||
$IPT -X LOG_ACCEPT
|
|
||||||
$IPT -X ONLYPRIVILEGIED
|
|
||||||
$IPT -X ONLYTRUSTED
|
|
||||||
$IPT -X NEEDRESTRICT
|
|
||||||
|
|
||||||
echo "...flushing IPTables rules is now finish : OK"
|
|
||||||
;;
|
|
||||||
|
|
||||||
status)
|
|
||||||
|
|
||||||
$IPT -L -n -v --line-numbers
|
|
||||||
$IPT -t nat -L -n -v --line-numbers
|
|
||||||
$IPT -t mangle -L -n -v --line-numbers
|
|
||||||
$IPT6 -L -n -v --line-numbers
|
|
||||||
$IPT6 -t mangle -L -n -v --line-numbers
|
|
||||||
;;
|
|
||||||
|
|
||||||
reset)
|
|
||||||
|
|
||||||
echo "Reset all IPTables counters..."
|
|
||||||
|
|
||||||
$IPT -Z
|
|
||||||
$IPT -t nat -Z
|
|
||||||
$IPT -t mangle -Z
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -Z
|
|
||||||
[ "$IPV6" != "off" ] && $IPT6 -t mangle -Z
|
|
||||||
|
|
||||||
echo "...reseting IPTables counters is now finish : OK"
|
|
||||||
;;
|
|
||||||
|
|
||||||
restart)
|
|
||||||
|
|
||||||
$0 stop
|
|
||||||
$0 start
|
|
||||||
;;
|
|
||||||
|
|
||||||
*)
|
|
||||||
|
|
||||||
echo "Usage: $0 {start|stop|restart|status|reset|squid}"
|
|
||||||
exit 1
|
|
||||||
esac
|
|
||||||
|
|
||||||
exit 0
|
|
407
minifirewall-start.sh
Executable file
407
minifirewall-start.sh
Executable file
|
@ -0,0 +1,407 @@
|
||||||
|
#!/bin/sh
|
||||||
|
|
||||||
|
# minifirewall
|
||||||
|
# See https://gitea.evolix.org/evolix/minifirewall
|
||||||
|
|
||||||
|
# Copyright (c) 2007-2020 Evolix
|
||||||
|
# This program is free software; you can redistribute it and/or
|
||||||
|
# modify it under the terms of the GNU General Public License
|
||||||
|
# as published by the Free Software Foundation; either version 3
|
||||||
|
# of the License.
|
||||||
|
|
||||||
|
# Description
|
||||||
|
# script for standalone server
|
||||||
|
|
||||||
|
# Start minifirewall
|
||||||
|
#
|
||||||
|
|
||||||
|
# Variables configuration
|
||||||
|
#########################
|
||||||
|
|
||||||
|
# nft path
|
||||||
|
NFT=/usr/sbin/nft
|
||||||
|
|
||||||
|
# Configuration
|
||||||
|
configfile="/etc/default/minifirewall"
|
||||||
|
|
||||||
|
DOCKER=$(grep "DOCKER=" /etc/default/minifirewall | awk -F '=' -F "'" '{print $2}')
|
||||||
|
INT=$(grep "INT=" /etc/default/minifirewall | awk -F '=' -F "'" '{print $2}')
|
||||||
|
|
||||||
|
# sysctl network security settings
|
||||||
|
##################################
|
||||||
|
|
||||||
|
# Don't answer to broadcast pings
|
||||||
|
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
|
||||||
|
|
||||||
|
# Ignore bogus ICMP responses
|
||||||
|
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
|
||||||
|
|
||||||
|
# Disable Source Routing
|
||||||
|
for i in /proc/sys/net/ipv4/conf/*/accept_source_route; do
|
||||||
|
echo 0 > $i
|
||||||
|
done
|
||||||
|
|
||||||
|
# Enable TCP SYN cookies to avoid TCP-SYN-FLOOD attacks
|
||||||
|
# cf http://cr.yp.to/syncookies.html
|
||||||
|
echo 1 > /proc/sys/net/ipv4/tcp_syncookies
|
||||||
|
|
||||||
|
# Disable ICMP redirects
|
||||||
|
for i in /proc/sys/net/ipv4/conf/*/accept_redirects; do
|
||||||
|
echo 0 > $i
|
||||||
|
done
|
||||||
|
|
||||||
|
for i in /proc/sys/net/ipv4/conf/*/send_redirects; do
|
||||||
|
echo 0 > $i
|
||||||
|
done
|
||||||
|
|
||||||
|
# Enable Reverse Path filtering : verify if responses use same network interface
|
||||||
|
for i in /proc/sys/net/ipv4/conf/*/rp_filter; do
|
||||||
|
echo 1 > $i
|
||||||
|
done
|
||||||
|
|
||||||
|
# log des paquets avec adresse incoherente
|
||||||
|
for i in /proc/sys/net/ipv4/conf/*/log_martians; do
|
||||||
|
echo 1 > $i
|
||||||
|
done
|
||||||
|
|
||||||
|
############
|
||||||
|
## FUNCTIONS
|
||||||
|
############
|
||||||
|
|
||||||
|
# Determine IP type
|
||||||
|
ip_type() {
|
||||||
|
v4_ips=""
|
||||||
|
v6_ips=""
|
||||||
|
for ip in $(echo $1 | sed 's/ /, /g'); do
|
||||||
|
if [ "$ip" != "${ip#*[0-9].[0-9]}" ]; then
|
||||||
|
v4_ips="$v4_ips$ip "
|
||||||
|
elif [ "$ip" != "${ip#*:[0-9a-fA-F]}" ]; then
|
||||||
|
v6_ips="$v6_ips$ip "
|
||||||
|
else
|
||||||
|
echo "Unrecognized IP format '$ip'"
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
|
#########################
|
||||||
|
## NFTables configuration
|
||||||
|
#########################
|
||||||
|
|
||||||
|
if ! test -f $configfile; then
|
||||||
|
echo "$configfile does not exist" >&2
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Parse configuration file
|
||||||
|
. $configfile
|
||||||
|
|
||||||
|
# Flush everything first
|
||||||
|
$NFT flush ruleset
|
||||||
|
|
||||||
|
# Add a filter table
|
||||||
|
$NFT add table inet minifirewall
|
||||||
|
|
||||||
|
# Add the input, forward, and output base chains. The default policy will be to drop the traffic.
|
||||||
|
$NFT add chain inet minifirewall minifirewall_input '{ type filter hook input priority 0 ; policy drop ; }'
|
||||||
|
$NFT add chain inet minifirewall minifirewall_forward '{ type filter hook forward priority 0 ; policy drop ; }'
|
||||||
|
$NFT add chain inet minifirewall minifirewall_output '{ type filter hook output priority 0 ; policy drop ; }'
|
||||||
|
|
||||||
|
# Add set with trusted IP addresses
|
||||||
|
$NFT add set inet minifirewall minifirewall_trusted_v4_ips '{ type ipv4_addr ; flags interval ;}'
|
||||||
|
$NFT add set inet minifirewall minifirewall_trusted_v6_ips '{ type ipv6_addr ; flags interval ;}'
|
||||||
|
|
||||||
|
ip_type "$TRUSTEDIPS"
|
||||||
|
|
||||||
|
if [ -n "$v4_ips" ] ; then
|
||||||
|
$NFT add element inet minifirewall minifirewall_trusted_v4_ips {$v4_ips}
|
||||||
|
fi
|
||||||
|
if [ -n "$v6_ips" ] ; then
|
||||||
|
$NFT add element inet minifirewall minifirewall_trusted_v6_ips {$v6_ips}
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with privileged IP addresses
|
||||||
|
$NFT add set inet minifirewall minifirewall_privileged_v4_ips '{ type ipv4_addr ; flags interval ;}'
|
||||||
|
$NFT add set inet minifirewall minifirewall_privileged_v6_ips '{ type ipv6_addr ; flags interval ;}'
|
||||||
|
|
||||||
|
ip_type "$PRIVILEGIEDIPS"
|
||||||
|
|
||||||
|
if [ -n "$v4_ips" ] ; then
|
||||||
|
$NFT add element inet minifirewall minifirewall_privileged_v4_ips {$v4_ips}
|
||||||
|
fi
|
||||||
|
if [ -n "$v6_ips" ] ; then
|
||||||
|
$NFT add element inet minifirewall minifirewall_privileged_v6_ips {$v6_ips}
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set for blocked IP addresses
|
||||||
|
$NFT add set inet minifirewall minifirewall_blocked_v4_ips '{ type ipv4_addr ; flags interval ;}'
|
||||||
|
$NFT add set inet minifirewall minifirewall_blocked_v6_ips '{ type ipv6_addr ; flags interval ;}'
|
||||||
|
|
||||||
|
# Add TCP/UDP chains for protected, public, semi-public and private ports
|
||||||
|
$NFT add chain inet minifirewall protected_tcp_ports
|
||||||
|
$NFT add chain inet minifirewall protected_udp_ports
|
||||||
|
$NFT add chain inet minifirewall public_tcp_ports
|
||||||
|
$NFT add chain inet minifirewall public_udp_ports
|
||||||
|
$NFT add chain inet minifirewall semipublic_tcp_ports
|
||||||
|
$NFT add chain inet minifirewall semipublic_udp_ports
|
||||||
|
$NFT add chain inet minifirewall private_tcp_ports
|
||||||
|
$NFT add chain inet minifirewall private_udp_ports
|
||||||
|
|
||||||
|
################
|
||||||
|
## Input traffic
|
||||||
|
################
|
||||||
|
|
||||||
|
# Related and established traffic is accepted
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input ct state related,established accept
|
||||||
|
|
||||||
|
# All loopback interface traffic is accepted
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input iif lo accept
|
||||||
|
|
||||||
|
# Allow services for $INTLAN (local server or local network) is accepted
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input ip saddr $INTLAN accept
|
||||||
|
|
||||||
|
# Any invalid traffic is dropped
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input ct state invalid drop
|
||||||
|
|
||||||
|
# ICMP and IGMP traffic is accepted
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input ip protocol icmp accept
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input meta l4proto ipv6-icmp accept
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input ip protocol igmp accept
|
||||||
|
|
||||||
|
# New UDP traffic from blocked IPs jumps to the private_udp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_blocked_v4_ips meta l4proto udp ct state new jump protected_udp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_blocked_v6_ips meta l4proto udp ct state new jump protected_udp_ports'
|
||||||
|
|
||||||
|
# New TCP traffic from blocked IPs jumps to the private_tcp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_blocked_v4_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump protected_tcp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_blocked_v6_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump protected_tcp_ports'
|
||||||
|
|
||||||
|
# New UDP traffic from trusted IPs jumps to the private_udp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_trusted_v4_ips meta l4proto udp ct state new jump private_udp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_trusted_v6_ips meta l4proto udp ct state new jump private_udp_ports'
|
||||||
|
|
||||||
|
# New TCP traffic from trusted IPs jumps to the private_tcp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_trusted_v4_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump private_tcp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_trusted_v6_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump private_tcp_ports'
|
||||||
|
|
||||||
|
# New UDP traffic from trusted IPs and privileged IPs jumps to the semipublic_udp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_privileged_v4_ips meta l4proto udp ct state new jump semipublic_udp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_privileged_v6_ips meta l4proto udp ct state new jump semipublic_udp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_trusted_v4_ips meta l4proto udp ct state new jump semipublic_udp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_trusted_v6_ips meta l4proto udp ct state new jump semipublic_udp_ports'
|
||||||
|
|
||||||
|
# New TCP traffic from trusted IPs and privileged IPs jumps to the semipublic_tcp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_privileged_v4_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump semipublic_tcp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_privileged_v6_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump semipublic_tcp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip saddr @minifirewall_trusted_v4_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump semipublic_tcp_ports'
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'ip6 saddr @minifirewall_trusted_v6_ips meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump semipublic_tcp_ports'
|
||||||
|
|
||||||
|
# New UDP traffic from any other IP jumps to the public_udp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'meta l4proto udp ct state new jump public_udp_ports'
|
||||||
|
|
||||||
|
# New TCP traffic from any other IP jumps to the public_tcp_ports chain
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input 'meta l4proto tcp tcp flags & (fin|syn|rst|ack) == syn ct state new jump public_tcp_ports'
|
||||||
|
|
||||||
|
# Reject all traffic that was not processed by other rules
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input meta l4proto udp reject
|
||||||
|
$NFT add rule inet minifirewall minifirewall_input meta l4proto tcp reject with tcp reset
|
||||||
|
|
||||||
|
# Feed public_tcp_ports chain with public TCP ports
|
||||||
|
for x in $SERVICESTCP1
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall public_tcp_ports tcp dport $x accept
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed public_udp_ports chain with public UDP ports
|
||||||
|
for x in $SERVICESUDP1
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall public_tcp_ports udp dport $x accept
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed semipublic_tcp_ports chain with semi-public TCP ports
|
||||||
|
for x in $SERVICESTCP2
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall semipublic_tcp_ports tcp dport $x accept
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed semipublic_udp_ports chain with semi-public UDP ports
|
||||||
|
for x in $SERVICESUDP2
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall semipublic_udp_ports udp dport $x accept
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed private_tcp_ports chain with private TCP ports
|
||||||
|
for x in $SERVICESTCP3
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall private_tcp_ports tcp dport $x accept
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed private_udp_ports chain with private UDP ports
|
||||||
|
for x in $SERVICESUDP3
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall private_udp_ports udp dport $x accept
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed protected_tcp_ports chain with protected TCP ports
|
||||||
|
for x in $SERVICESTCP1p
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall protected_tcp_ports tcp dport $x drop
|
||||||
|
done
|
||||||
|
|
||||||
|
# Feed protected_udp_ports chain with protected UDP ports
|
||||||
|
for x in $SERVICESUDP1p
|
||||||
|
do
|
||||||
|
$NFT add rule inet minifirewall protected_udp_ports udp dport $x drop
|
||||||
|
done
|
||||||
|
|
||||||
|
#####################################
|
||||||
|
## Output traffic / external services
|
||||||
|
#####################################
|
||||||
|
|
||||||
|
# Add set with $DNSSERVERS elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_dnsservers { type ipv4_addr\;}
|
||||||
|
if [ ! -z $DNSSERVEURS ]
|
||||||
|
then
|
||||||
|
if echo $DNSSERVEURS | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP/UDP port 53
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output udp dport 53 counter accept
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport 53 counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_dnsservers set and allow this set to be reached on TCP/UDP port 53
|
||||||
|
$NFT add element inet minifirewall minifirewall_dnsservers {$(echo $DNSSERVEURS | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_dnsservers udp dport 53 counter accept
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_dnsservers tcp dport 53 counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $HTTPSITES elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_httpsites { type ipv4_addr\;}
|
||||||
|
if [ ! -z $HTTPSITES ]
|
||||||
|
then
|
||||||
|
if echo $HTTPSITES | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP port 80
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport 80 counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_httpsites set and allow this set to be reach on TCP port 80
|
||||||
|
$NFT add element inet minifirewall minifirewall_httpsites {$(echo $HTTPSITES | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_httpsites tcp dport 80 counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $HTTPSSITES elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_httpssites { type ipv4_addr\;}
|
||||||
|
if [ ! -z $HTTPSSITES ]
|
||||||
|
then
|
||||||
|
if echo $HTTPSSITES | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP port 443
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport 443 counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_httpssites set and allow this set to be reach on TCP port 443
|
||||||
|
$NFT add element inet minifirewall minifirewall_httpssites {$(echo $HTTPSSITES | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_httpssites tcp dport 443 counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $FTPSITES elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_ftpsites { type ipv4_addr\;}
|
||||||
|
if [ ! -z $FTPSITES ]
|
||||||
|
then
|
||||||
|
if echo $FTPSITES | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP ports 20, 21, 1024-65535
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport {20, 21, 1024-65535} counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_ftpsites set and allow this set to be reach on TCP ports 20, 21, 1024-65535
|
||||||
|
$NFT add element inet minifirewall minifirewall_ftpsites {$(echo $FTPSITES | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_ftpsites tcp dport {20, 21, 1024-65535} counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $SSHOK elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_sshok { type ipv4_addr\;}
|
||||||
|
if [ ! -z $SSHOK ]
|
||||||
|
then
|
||||||
|
if echo $SSHOK | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP port 22
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport 22 counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_sshok set and allow this set to be reach on TCP port 22
|
||||||
|
$NFT add element inet minifirewall minifirewall_sshok {$(echo $SSHOK | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_sshok tcp dport 22 counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $SMTPOK elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_smtpok { type ipv4_addr\;}
|
||||||
|
if [ ! -z $SMTPOK ]
|
||||||
|
then
|
||||||
|
if echo $SMTPOK | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP port 25
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport 25 counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_smtpok set and allow this set to be reach on TCP port 25
|
||||||
|
$NFT add element inet minifirewall minifirewall_smtpok {$(echo $SMTPOK | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_smtpok tcp dport 25 counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $SMTPSECUREOK elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_smtpsecureok { type ipv4_addr\;}
|
||||||
|
if [ ! -z $SMTPSECUREOK ]
|
||||||
|
then
|
||||||
|
if echo $SMTPSECUREOK | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP ports 465 and 587
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport {465, 587} counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_smtpsecureok set and allow this set to be reach on TCP ports 465 and 587
|
||||||
|
$NFT add element inet minifirewall minifirewall_smtpsecureok {$(echo $SMTPSECUREOK | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_smtpsecureok tcp dport {465, 587} counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Add set with $NTPOK elements
|
||||||
|
$NFT add set inet minifirewall minifirewall_ntpok { type ipv4_addr\;}
|
||||||
|
if [ ! -z $NTPOK ]
|
||||||
|
then
|
||||||
|
if echo $NTPOK | grep -q "0.0.0.0/0"
|
||||||
|
then
|
||||||
|
# If 0.0.0.0/0 is present we allow any output on TCP ports 123
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output tcp dport 123 counter accept
|
||||||
|
else
|
||||||
|
# Else we add each element to the minifirewall_smtpsecureok set and allow this set to be reach on TCP port 123
|
||||||
|
$NFT add element inet minifirewall minifirewall_ntpok {$(echo $NTPOK | sed 's/ /, /g')}
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr @minifirewall_ntpok tcp dport 123 counter accept
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
|
||||||
|
# If specified, we add per host output autorisation
|
||||||
|
if [ -n $OUTPUTOK ]
|
||||||
|
then
|
||||||
|
for item in $(echo $OUTPUTOK)
|
||||||
|
do
|
||||||
|
ip=$(echo $item | awk -F'!' '{print $1}')
|
||||||
|
port=$(echo $item | awk -F'!' '{print $2}')
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip daddr $ip tcp dport $port counter accept
|
||||||
|
done
|
||||||
|
fi
|
||||||
|
|
||||||
|
# Related and established traffic is accepted
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ct state established,related accept
|
||||||
|
|
||||||
|
# ICMP and IGMP traffic is accepted
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip protocol icmp accept
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output meta l4proto ipv6-icmp accept
|
||||||
|
$NFT add rule inet minifirewall minifirewall_output ip protocol igmp accept
|
||||||
|
|
||||||
|
trap - INT TERM EXIT
|
||||||
|
|
||||||
|
echo "...starting NFTables rules is now finish : OK"
|
||||||
|
|
||||||
|
exit 0
|
||||||
|
|
31
minifirewall-stop.sh
Executable file
31
minifirewall-stop.sh
Executable file
|
@ -0,0 +1,31 @@
|
||||||
|
#!/bin/sh
|
||||||
|
|
||||||
|
# minifirewall
|
||||||
|
# See https://gitea.evolix.org/evolix/minifirewall
|
||||||
|
|
||||||
|
# Copyright (c) 2007-2020 Evolix
|
||||||
|
# This program is free software; you can redistribute it and/or
|
||||||
|
# modify it under the terms of the GNU General Public License
|
||||||
|
# as published by the Free Software Foundation; either version 3
|
||||||
|
# of the License.
|
||||||
|
|
||||||
|
# Description
|
||||||
|
# script for standalone server
|
||||||
|
|
||||||
|
# Stop minifirewall
|
||||||
|
#
|
||||||
|
|
||||||
|
# Variables configuration
|
||||||
|
#########################
|
||||||
|
|
||||||
|
# nft path
|
||||||
|
NFT=/usr/sbin/nft
|
||||||
|
|
||||||
|
echo "Flush all rules and accept everything..."
|
||||||
|
|
||||||
|
# Flush everything
|
||||||
|
$NFT flush ruleset
|
||||||
|
|
||||||
|
echo "...flushing IPTables rules is now finish : OK"
|
||||||
|
|
||||||
|
exit 0
|
|
@ -1,6 +1,4 @@
|
||||||
# Configuration for minifirewall : https://forge.evolix.org/projects/minifirewall
|
# Configuration for minifirewall : https://forge.evolix.org/projects/minifirewall
|
||||||
# For fun, we keep last change from first CVS repository:
|
|
||||||
# version 0.1 - 12 juillet 2007 $Id: firewall.rc,v 1.2 2007/07/12 19:08:59 reg Exp $
|
|
||||||
|
|
||||||
# Main interface
|
# Main interface
|
||||||
INT='eth0'
|
INT='eth0'
|
||||||
|
@ -21,9 +19,9 @@ INTLAN='192.168.0.2/32'
|
||||||
# Trusted IPv4 addresses for private and semi-public services
|
# Trusted IPv4 addresses for private and semi-public services
|
||||||
TRUSTEDIPS=''
|
TRUSTEDIPS=''
|
||||||
|
|
||||||
# Privilegied IPv4 addresses for semi-public services
|
# Privileged IPv4 addresses for semi-public services
|
||||||
# (no need to add again TRUSTEDIPS)
|
# (no need to add again TRUSTEDIPS)
|
||||||
PRIVILEGIEDIPS=''
|
PRIVILEGEDIPS=''
|
||||||
|
|
||||||
|
|
||||||
# Local services IPv4/IPv6 restrictions
|
# Local services IPv4/IPv6 restrictions
|
||||||
|
@ -77,27 +75,6 @@ SMTPSECUREOK=''
|
||||||
# NTP authorizations
|
# NTP authorizations
|
||||||
NTPOK='0.0.0.0/0'
|
NTPOK='0.0.0.0/0'
|
||||||
|
|
||||||
|
# Per host output autorisations (IP!Port)
|
||||||
# IPv6 Specific rules
|
# OUTPUTOK='203.0.113.1!42 203.0.113.2!43'
|
||||||
#####################
|
OUTPUTOK=''
|
||||||
|
|
||||||
# Example: allow input HTTP/HTTPS/SMTP/DNS traffic
|
|
||||||
/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 80 --match state --state ESTABLISHED,RELATED -j ACCEPT
|
|
||||||
/sbin/ip6tables -A INPUT -i $INT -p tcp --sport 443 --match state --state ESTABLISHED,RELATED -j ACCEPT
|
|
||||||
/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 ...
|
|
||||||
|
|
14
minifirewall.service
Normal file
14
minifirewall.service
Normal file
|
@ -0,0 +1,14 @@
|
||||||
|
[Unit]
|
||||||
|
Description=minifirewall
|
||||||
|
Documentation=https://gitea.evolix.org/evolix/minifirewall
|
||||||
|
After=default.target
|
||||||
|
|
||||||
|
[Service]
|
||||||
|
Type=oneshot
|
||||||
|
ExecStart=/usr/sbin/minifirewall-start.sh
|
||||||
|
RemainAfterExit=yes
|
||||||
|
ExecStop=/usr/sbin/minifirewall-stop.sh
|
||||||
|
StandardOutput=journal
|
||||||
|
|
||||||
|
[Install]
|
||||||
|
WantedBy=multi-user.target
|
Loading…
Reference in a new issue