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instantni-vps/salt/iptables/firewall
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#!/bin/bash | |
# Start/stop/restart firewall | |
### BEGIN INIT INFO | |
# Provides: firewall | |
# Required-Start: $network | |
# Required-Stop: $network | |
# Default-Start: 2 3 4 5 | |
# Default-Stop: 0 1 6 | |
# Short-Description: iptables | |
# Description: iptables | |
### END INIT INFO | |
IPT=/sbin/iptables | |
IPT6=/sbin/ip6tables | |
firewall_start() { | |
echo 1 > /proc/sys/net/ipv4/tcp_syncookies | |
echo 0 > /proc/sys/net/ipv4/conf/all/accept_redirects | |
echo 0 > /proc/sys/net/ipv4/conf/all/send_redirects | |
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses | |
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts | |
echo 0 > /proc/sys/net/ipv4/conf/all/accept_source_route | |
echo 1 > /proc/sys/net/ipv4/conf/all/log_martians | |
# Set default policy to DROP | |
$IPT -P INPUT DROP | |
$IPT -P OUTPUT ACCEPT | |
$IPT -P FORWARD DROP | |
$IPT6 -P INPUT DROP | |
$IPT6 -P OUTPUT ACCEPT | |
$IPT6 -P FORWARD DROP | |
# Flush old rules | |
$IPT -F | |
$IPT6 -F | |
# Allow loopback traffic | |
$IPT -A INPUT -i lo -j ACCEPT | |
$IPT -A OUTPUT -o lo -j ACCEPT | |
$IPT6 -A INPUT -i lo -j ACCEPT | |
$IPT6 -A OUTPUT -o lo -j ACCEPT | |
# icmp | |
$IPT -A INPUT -p icmp --icmp-type 8 -s 0/0 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT | |
$IPT -A OUTPUT -p icmp --icmp-type 0 -d 0/0 -m state --state ESTABLISHED,RELATED -j ACCEPT | |
$IPT6 -A INPUT -p ipv6-icmp -j ACCEPT | |
{%- for iface in grains['ip_interfaces'].keys() %} | |
{% if iface != "lo" %} | |
#Interface "{{ iface }}" | |
$IPT -A INPUT -i {{ iface }} -p all -m state --state ESTABLISHED,RELATED -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p all -m state --state ESTABLISHED,RELATED -j ACCEPT | |
# Allow services | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port 25 -m state --state NEW -j ACCEPT | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port 80 -m state --state NEW -j ACCEPT | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port 443 -m state --state NEW -j ACCEPT | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port 465 -m state --state NEW -j ACCEPT | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port 587 -m state --state NEW -j ACCEPT | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port 993 -m state --state NEW -j ACCEPT | |
$IPT -A INPUT -i {{ iface }} -p tcp --destination-port {{ pillar.ssh_port }} -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port 25 -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port 80 -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port 443 -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port 465 -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port 587 -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port 993 -m state --state NEW -j ACCEPT | |
$IPT6 -A INPUT -i {{ iface }} -p tcp --destination-port {{ pillar.ssh_port }} -m state --state NEW -j ACCEPT | |
{% endif %} | |
{%- endfor %} | |
} | |
firewall_stop() { | |
$IPT -F | |
$IPT -X | |
$IPT -P INPUT ACCEPT | |
$IPT -P OUTPUT ACCEPT | |
$IPT -P FORWARD ACCEPT | |
$IPT6 -F | |
$IPT6 -X | |
$IPT6 -P INPUT ACCEPT | |
$IPT6 -P OUTPUT ACCEPT | |
$IPT6 -P FORWARD ACCEPT | |
} | |
firewall_restart() { | |
firewall_stop | |
firewall_start | |
} | |
case "$1" in | |
'start') | |
firewall_start | |
;; | |
'stop') | |
firewall_stop | |
;; | |
'restart') | |
firewall_restart | |
;; | |
*) | |
firewall_start | |
esac |