verzia 2.25, 2005/06/29 15:24:04 |
verzia 2.47, 2006/09/24 16:17:10 |
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# Can be started by init or by hand. |
# Can be started by init or by hand. |
# |
# |
# Developed by Lubomir Host 'rajo' <rajo AT platon.sk> |
# Developed by Lubomir Host 'rajo' <rajo AT platon.sk> |
# Copyright (c) 2003-2005 Platon SDG, http://platon.sk/ |
# Copyright (c) 2003-2006 Platon SDG, http://platon.sk/ |
# Licensed under terms of GNU General Public License. |
# Licensed under terms of GNU General Public License. |
# All rights reserved. |
# All rights reserved. |
# |
# |
# $Platon: scripts/shell/firewall/fw-universal.sh,v 2.24 2005/04/18 22:49:30 rajo Exp $ |
# $Platon: scripts/shell/firewall/fw-universal.sh,v 2.30 2005/11/01 00:36:24 rajo Exp $ |
# |
# |
# Changelog: |
# Changelog: |
# 2003-10-24 - created |
# 2003-10-24 - created |
Riadok 19 DESC="firewall" |
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Riadok 19 DESC="firewall" |
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PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin |
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin |
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DEFAULT_FIREWALL_CONFIG="${DEFAULT_FIREWALL_CONFIG:=/etc/default/firewall}" |
DEFAULT_FIREWALL_CONFIG="${DEFAULT_FIREWALL_CONFIG:=/etc/default/firewall}" |
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DEFAULT_CACHE_DIR="${DEFAULT_CACHE_DIR:=/var/cache/firewall}" |
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if [ -f "$DEFAULT_FIREWALL_CONFIG" ]; then |
if [ -f "$DEFAULT_FIREWALL_CONFIG" ]; then |
echo "Reading config file $DEFAULT_FIREWALL_CONFIG" |
echo "Reading config file $DEFAULT_FIREWALL_CONFIG" |
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DEFAULT_POLICY="${DEFAULT_POLICY:=DROP}" |
DEFAULT_POLICY="${DEFAULT_POLICY:=DROP}" |
# which modules to load |
# which modules to load |
MODULES="${MODULES:=}" |
MODULES="${MODULES:=}" |
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MODULES_LOADING="${MODULES_LOADING:=yes}" |
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MODULES_REMOVING="${MODULES_REMOVING:=no}" |
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LOG_LIMIT="${LOG_LIMIT:=-m limit --limit 12/h --limit-burst 10 -j LOG --log-level notice --log-prefix}" |
LOG_LIMIT="${LOG_LIMIT:=-m limit --limit 12/h --limit-burst 10 -j LOG --log-level notice --log-prefix}" |
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# Paths: |
# Paths: |
#IPTABLES=":" # for testing only - does nothing |
#IPTABLES=":" # for testing only - does nothing |
IPTABLES="${IPTABLES:=$DEBUG/sbin/iptables}" |
IPTABLES="${IPTABLES:=$DEBUG/sbin/iptables}" |
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IPTABLES_SAVE="${IPTABLES_SAVE:=$DEBUG/sbin/iptables-save}" |
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IPTABLES_RESTORE="${IPTABLES_RESTORE:=$DEBUG/sbin/iptables-restore}" |
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if [ "x$LOGGING" = "xoff" ]; then |
if [ "x$LOGGING" = "xoff" ]; then |
IPTABLES_LOG=": log turned off" |
IPTABLES_LOG=": log turned off" |
else |
else |
Riadok 51 AWK="${AWK:=/usr/bin/awk}" |
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Riadok 57 AWK="${AWK:=/usr/bin/awk}" |
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# loopback interface |
# loopback interface |
LO_IFACE="${LO_IFACE:=lo}" |
LO_IFACE="${LO_IFACE:=lo}" |
LO_IP="IP_$LO_IFACE" |
# Hide NAT clients behind firewall |
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NAT_SET_TTL="${NAT_SET_TTL:=no}" |
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# |
# |
# CONSTANTS - Do not edit |
# CONSTANTS - Do not edit |
Riadok 73 TRACEROUTE_DEST_PORTS="33434:33523" # Tr |
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Riadok 80 TRACEROUTE_DEST_PORTS="33434:33523" # Tr |
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# allow some ICMP packets - needed for ping etc. |
# allow some ICMP packets - needed for ping etc. |
ACCEPT_ICMP_PACKETS="${ACCEPT_ICMP_PACKETS:=echo-reply destination-unreachable echo-request time-exceeded}" |
ACCEPT_ICMP_PACKETS="${ACCEPT_ICMP_PACKETS:=echo-reply destination-unreachable echo-request time-exceeded}" |
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print_first() |
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{ # {{{ |
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echo $1 |
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} # }}} |
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get_first_ip_addr() |
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{ # {{{ |
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varname="$1" |
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print_first `echo ${!varname} | sort -g` |
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} # }}} |
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# load necessary modules from $MODULES variable |
# load necessary modules from $MODULES variable |
load_modules() |
load_modules() |
{ # {{{ |
{ # {{{ |
echo "# Loading modules" |
if [ "e$MODULES_LOADING" = "eyes" ]; then |
for mod in $MODULES; do |
echo "# Loading modules" |
echo " $MODPROBE $mod" |
for mod in $MODULES; do |
$MODPROBE $mod |
echo " $MODPROBE $mod" |
done |
$MODPROBE $mod |
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done |
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fi |
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} # }}} |
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load_cache() |
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{ # {{{ |
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if [ ! -d "$DEFAULT_CACHE_DIR" ]; then |
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mkdir -p "$DEFAULT_CACHE_DIR"; |
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fi |
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config=`cat $DEFAULT_FIREWALL_CONFIG $0`; # config file and firewalling script |
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md5key=`echo "config = '$config' parsed_interfaces ='$parsed_interfaces' parsed_routes='$parsed_routes'" | md5sum | $AWK '{ print $1; }'`; |
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CACHE_FILE="$DEFAULT_CACHE_DIR/$md5key" |
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#echo "CACHE_FILE=$CACHE_FILE" |
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if [ -f "$CACHE_FILE" ]; then |
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echo "Loading rules from cache file $CACHE_FILE" |
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$IPTABLES_RESTORE -c < $CACHE_FILE; |
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forward_on # this has nothing to do with IPtables rules, we need to run them explicitly |
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exit 0; |
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fi |
} # }}} |
} # }}} |
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# unload necessary modules from $MODULES variable |
# unload necessary modules from $MODULES variable |
unload_modules() |
unload_modules() |
{ # {{{ |
{ # {{{ |
# reverse modules |
# reverse modules |
echo "# Removing modules" |
if [ "e$MODULES_REMOVING" = "eyes" ]; then |
R_MODULES=`echo "$MODULES" | tr ' ' '\012' | tac | tr '\012' ' '` |
echo "# Removing modules" |
for mod in $R_MODULES; do |
R_MODULES=`echo "$MODULES" | tr ' ' '\012' | tac | tr '\012' ' '` |
echo " $RMMOD $mod" |
for mod in $R_MODULES; do |
$RMMOD $mod |
echo " $RMMOD $mod" |
done |
$RMMOD $mod |
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done |
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fi |
} # }}} |
} # }}} |
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# print status of detected interfaces |
# print status of detected interfaces |
Riadok 102 print_iface_status() |
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Riadok 144 print_iface_status() |
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# Print interfaces: |
# Print interfaces: |
echo "# iface | IP addr | Gateway | broadcast | netmask | HW addr" |
echo "# iface | IP addr | Gateway | broadcast | netmask | HW addr" |
for iface in $interfaces; do |
for iface in $interfaces; do |
IP="IP_$iface"; Gateway="Gateway_$iface"; Bcast="Bcast_$iface"; Mask="Mask_$iface"; HWaddr="HWaddr_$iface"; |
IPS="IP_$iface"; |
echo "$iface | ${!IP} | ${!Gateway} | ${!Bcast} | ${!Mask} | ${!HWaddr}" |
for IP in ${!IPS}; do |
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Gateway="Gateway_$iface"; Bcast="Bcast_$iface"; Mask="Mask_$iface"; HWaddr="HWaddr_$iface"; |
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echo "$iface | ${IP} | ${!Gateway} | ${!Bcast} | ${!Mask} | ${!HWaddr}" |
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done |
done |
done |
} # }}} |
} # }}} |
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Riadok 123 antispoof_on() |
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Riadok 168 antispoof_on() |
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done |
done |
} # }}} |
} # }}} |
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# Turn on IP packets forwarding |
forward_on() |
forward_on() |
{ # {{{ |
{ # {{{ |
echo -en "NAT: Enabling packet forwarding..." |
# NAT requires turn on IP forwarding |
echo 1 > /proc/sys/net/ipv4/ip_forward |
if [ ! -z "$NAT_LAN_IFACE" ]; then |
echo " done." |
echo -en "NAT: Enabling packet forwarding..." |
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echo 1 > /proc/sys/net/ipv4/ip_forward |
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echo " done." |
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fi |
} # }}} |
} # }}} |
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forward_off() |
forward_off() |
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echo " done." |
echo " done." |
echo -en "NAT: Masquerading local subnet: $NAT_SUBNET_IFACE --> $NAT_LAN_IFACE" |
echo -en "NAT: Masquerading local subnet: $NAT_SUBNET_IFACE --> $NAT_LAN_IFACE" |
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ip="IP_$NAT_SUBNET_IFACE"; |
ip="`get_first_ip_addr IP_$NAT_SUBNET_IFACE`" |
netmask="Mask_$NAT_SUBNET_IFACE" |
netmask="Mask_$NAT_SUBNET_IFACE" |
localnet="${!ip}/${!netmask}" |
localnet="$ip/${!netmask}" |
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lan_ip="IP_$NAT_LAN_IFACE" |
lan_ip="`get_first_ip_addr IP_$NAT_LAN_IFACE`" |
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# alow packets from private subnet |
# alow packets from private subnet |
$IPTABLES -A FORWARD -s ! $localnet -i $NAT_SUBNET_IFACE -j DROP |
$IPTABLES -A FORWARD -s ! $localnet -i $NAT_SUBNET_IFACE -j DROP |
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done |
done |
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for redirect in $NAT_TCP_PORT_REDIRECT; do |
for redirect in $NAT_TCP_PORT_REDIRECT; do |
eval `echo $redirect | awk -v FS=: '{ printf "remote_port=%s; local_port=%s;", $1, $2; }'` |
eval `echo $redirect | $AWK -v FS=: '{ printf "remote_port=%s; local_port=%s;", $1, $2; }'` |
echo -en " $remote_port:$local_port" |
echo -en " $remote_port:$local_port" |
$IPTABLES -t nat -A PREROUTING -p TCP \ |
$IPTABLES -t nat -A PREROUTING -p TCP \ |
-i ! $NAT_LAN_IFACE -d ! ${!lan_ip} \ |
-i ! $NAT_LAN_IFACE -d ! $lan_ip \ |
--dport $remote_port -j REDIRECT --to-port $local_port |
--dport $remote_port -j REDIRECT --to-port $local_port |
done |
done |
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if [ ! -z "$NAT_TCP_PORT_FORWARD" ]; then |
if [ ! -z "$NAT_TCP_PORT_FORWARD" ]; then |
echo -en "\tForwarding ports to local machines:" |
echo -en "\tForwarding ports to local machines:" |
for redirect in $NAT_TCP_PORT_FORWARD; do |
for redirect in $NAT_TCP_PORT_FORWARD; do |
eval `echo $redirect | awk -v FS=: '{ printf "src_port=%s; local_machine=%s; dest_port=%s;", $1, $2, $3; }'` |
eval `echo $redirect | $AWK -v FS=: '{ printf "src_port=%s; local_machine=%s; dest_port=%s;", $1, $2, $3; }'` |
echo -en " $src_port -> $local_machine:$dest_port" |
echo -en " $src_port -> $local_machine:$dest_port" |
$IPTABLES -t nat -A PREROUTING -p TCP -i $NAT_LAN_IFACE -d ${!lan_ip} \ |
$IPTABLES -t nat -A PREROUTING -p TCP -i $NAT_LAN_IFACE -d $lan_ip \ |
--dport $src_port -j DNAT --to $local_machine:$dest_port |
--dport $src_port -j DNAT --to $local_machine:$dest_port |
$IPTABLES -A FORWARD -p TCP -i eth0 -d $local_machine --dport $dest_port -j ACCEPT |
$IPTABLES -A FORWARD -p TCP -i $NAT_LAN_IFACE -d $local_machine --dport $dest_port -j ACCEPT |
done |
done |
echo " done." |
echo " done." |
fi |
fi |
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#$IPTABLES -A FORWARD -m state --state NEW -o $NAT_LAN_IFACE -j ACCEPT |
#$IPTABLES -A FORWARD -m state --state NEW -o $NAT_LAN_IFACE -j ACCEPT |
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT |
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT |
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# hide NAT clients behind firewall: - set TTL |
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# XXX: warning: this breaks traceroute !!! |
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if [ ! "a$NAT_SET_TTL" = "ano" ]; then |
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echo "NAT: clients hidden behind firewall - setting TTL to $NAT_SET_TTL" |
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$IPTABLES -t mangle -A POSTROUTING -o $NAT_LAN_IFACE -j TTL --ttl-set $NAT_SET_TTL |
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fi |
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fi |
fi |
} # }}} |
} # }}} |
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Riadok 388 log_new_connections() |
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Riadok 445 log_new_connections() |
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{ # {{{ |
{ # {{{ |
if [ ! -z "$NAT_LOG_NEW_CONNECTIONS" ]; then |
if [ ! -z "$NAT_LOG_NEW_CONNECTIONS" ]; then |
if [ "x$NAT_LOG_NEW_CONNECTIONS" = "xyes" ]; then |
if [ "x$NAT_LOG_NEW_CONNECTIONS" = "xyes" ]; then |
echo -en "Logging new connections:" |
if [ "x$NAT_LOG_NEW_CONNECTIONS" = "xyes" ]; then |
$IPTABLES_LOG -A INPUT -m state --state NEW -j LOG --log-prefix "IN connection: " |
NAT_LOG_NEW_CONNECTIONS="TCP UDP" |
$IPTABLES_LOG -A OUTPUT -m state --state NEW -j LOG --log-prefix "OUT connection: " |
fi |
$IPTABLES_LOG -A FORWARD -m state --state NEW -j LOG --log-prefix "FWD connection: " |
echo -en "Logging new connections $NAT_LOG_NEW_CONNECTIONS:" |
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for proto in $NAT_LOG_NEW_CONNECTIONS; do |
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$IPTABLES_LOG -A INPUT -m state --state NEW -p $proto -j LOG --log-prefix "IN connection: " |
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$IPTABLES_LOG -A OUTPUT -m state --state NEW -p $proto -j LOG --log-prefix "OUT connection: " |
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$IPTABLES_LOG -A FORWARD -m state --state NEW -p $proto -j LOG --log-prefix "FWD connection: " |
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done |
echo " done." |
echo " done." |
fi |
fi |
fi |
fi |
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{ # {{{ |
{ # {{{ |
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for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
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drop_output_tcp="${iface}_DROP_OUTPUT_TCP" |
drop_output_tcp="${iface}_DROP_OUTPUT_TCP" |
DROP_OUTPUT_TCP="${!drop_output_tcp}" |
DROP_OUTPUT_TCP="${!drop_output_tcp}" |
drop_output_udp="${iface}_DROP_OUTPUT_UDP" |
drop_output_udp="${iface}_DROP_OUTPUT_UDP" |
Riadok 470 allow_accept_all() |
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Riadok 531 allow_accept_all() |
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allow_input() |
allow_input() |
{ # {{{ |
{ # {{{ |
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if [ ! -z "$NAT_LAN_IFACE" ]; then |
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for client_ip in $NAT_CLIENT_DROP; do |
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echo -en " !$client_ip"; |
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$IPTABLES -A INPUT -s $client_ip -i $NAT_SUBNET_IFACE -j DROP |
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done |
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fi |
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if [ ! -z "$ALL_DROP_INPUT_TCP" ]; then |
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echo -en "Drop ALL INPUT TCP connections on ports:" |
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for port in $ALL_DROP_INPUT_TCP; do |
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for iface in $INTERFACES; do |
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echo -en " $port($iface)" |
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IPS="IP_$iface"; |
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for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p TCP --dport $port -j DROP |
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done |
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done |
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done |
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echo " done." |
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fi |
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if [ ! -z "$ALL_DROP_INPUT_UDP" ]; then |
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echo -en "Drop ALL INPUT UDP connections on ports:" |
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for port in $ALL_DROP_INPUT_UDP; do |
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for iface in $INTERFACES; do |
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echo -en " $port($iface)" |
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IPS="IP_$iface"; |
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for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p UDP --dport $port -j DROP |
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done |
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done |
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done |
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echo " done." |
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fi |
if [ ! -z "$ALL_ACCEPT_INPUT_TCP" ]; then |
if [ ! -z "$ALL_ACCEPT_INPUT_TCP" ]; then |
echo -en "Accepting ALL INPUT TCP connections on ports:" |
echo -en "Accepting ALL INPUT TCP connections on ports:" |
for port in $ALL_ACCEPT_INPUT_TCP; do |
for port in $ALL_ACCEPT_INPUT_TCP; do |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
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echo -en " $port($iface)" |
echo -en " $port($iface)" |
$IPTABLES -A INPUT -i $iface -d ${!ip} -p TCP --dport $port -j ACCEPT |
IPS="IP_$iface"; |
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for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p TCP --dport $port -j ACCEPT |
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done |
done |
done |
done |
done |
echo " done." |
echo " done." |
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echo -en "Accepting ALL INPUT UDP connections on ports:" |
echo -en "Accepting ALL INPUT UDP connections on ports:" |
for port in $ALL_ACCEPT_INPUT_UDP; do |
for port in $ALL_ACCEPT_INPUT_UDP; do |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
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echo -en " $port($iface)" |
echo -en " $port($iface)" |
$IPTABLES -A INPUT -i $iface -p UDP --dport $port -j ACCEPT |
IPS="IP_$iface"; |
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for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p UDP --dport $port -j ACCEPT |
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done |
done |
done |
done |
done |
echo " done." |
echo " done." |
fi |
fi |
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for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
IPS="IP_$iface"; |
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redirect_tcp="${iface}_REDIRECT_TCP" |
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REDIRECT_TCP="${!redirect_tcp}" |
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redirect_udp="${iface}_REDIRECT_UDP" |
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REDIRECT_UDP="${!redirect_udp}" |
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accept_input_tcp="${iface}_ACCEPT_INPUT_TCP" |
accept_input_tcp="${iface}_ACCEPT_INPUT_TCP" |
ACCEPT_INPUT_TCP="${!accept_input_tcp}" |
ACCEPT_INPUT_TCP="${!accept_input_tcp}" |
accept_input_udp="${iface}_ACCEPT_INPUT_UDP" |
accept_input_udp="${iface}_ACCEPT_INPUT_UDP" |
ACCEPT_INPUT_UDP="${!accept_input_udp}" |
ACCEPT_INPUT_UDP="${!accept_input_udp}" |
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if [ ! -z "$REDIRECT_TCP" ]; then |
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echo -en "$iface: redirecting TCP connections:" |
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ip="`get_first_ip_addr IP_$iface`"; |
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for redirect in $REDIRECT_TCP; do |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 2) { remote_ip = "0.0.0.0/0"; from_port = $1; to_port = $2; } \ |
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(NF == 3) { remote_ip = $1; from_port = $2; to_port = $3; } \ |
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END { printf "remote_ip=%s; from_port=%s; to_port=%s;", remote_ip, from_port, to_port; }'` |
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echo -en " $remote_ip:$from_port->$to_port" |
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$IPTABLES -t nat -A PREROUTING -p TCP -i $iface -s $remote_ip -d $ip --dport $from_port -j REDIRECT --to-port $to_port |
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done |
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echo " done." |
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fi |
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if [ ! -z "$REDIRECT_UDP" ]; then |
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echo -en "$iface: redirecting UDP connections:" |
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ip="`get_first_ip_addr IP_$iface`"; |
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for redirect in $REDIRECT_UDP; do |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 2) { remote_ip = "0.0.0.0/0"; from_port = $1; to_port = $2; } \ |
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(NF == 3) { remote_ip = $1; from_port = $2; to_port = $3; } \ |
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END { printf "remote_ip=%s; from_port=%s; to_port=%s;", remote_ip, from_port, to_port; }'` |
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echo -en " $remote_ip:$from_port->$to_port" |
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$IPTABLES -t nat -A PREROUTING -p UDP -i $iface -s $remote_ip -d $ip --dport $from_port -j REDIRECT --to-port $to_port |
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done |
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echo " done." |
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fi |
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if [ ! -z "$ACCEPT_INPUT_TCP" ]; then |
if [ ! -z "$ACCEPT_INPUT_TCP" ]; then |
echo -en "$iface: Accepting INPUT TCP connections on ports:" |
echo -en "$iface: Accepting INPUT TCP connections on ports:" |
for port in $ACCEPT_INPUT_TCP; do |
for port in $ACCEPT_INPUT_TCP; do |
echo -en " $port" |
echo -en " $port" |
$IPTABLES -A INPUT -i $iface -d ${!ip} -p TCP --dport $port -j ACCEPT |
for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p TCP --dport $port -j ACCEPT |
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done |
done |
done |
echo " done." |
echo " done." |
fi |
fi |
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echo -en " $port" |
echo -en " $port" |
#$IPTABLES -A INPUT -i $iface -d ${!INET_IP} -p UDP --dport $port -j ACCEPT |
#$IPTABLES -A INPUT -i $iface -d ${!INET_IP} -p UDP --dport $port -j ACCEPT |
#$IPTABLES -A INPUT -i $iface --source 192.168.1.0/16 -p UDP --dport $port -j ACCEPT |
#$IPTABLES -A INPUT -i $iface --source 192.168.1.0/16 -p UDP --dport $port -j ACCEPT |
$IPTABLES -A INPUT -i $iface -p UDP --dport $port -j ACCEPT |
for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p UDP --dport $port -j ACCEPT |
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done |
done |
done |
echo " done." |
echo " done." |
fi |
fi |
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# Enable outgoing TRACEROUTE requests (required e.g. by Skype, http://www.skype.com) |
# Enable outgoing TRACEROUTE requests (required e.g. by Skype, http://www.skype.com) |
if [ ! -z "$TRACEROUTE_IFACE" ]; then |
if [ ! -z "$TRACEROUTE_IFACE" ]; then |
ip="IP_$ANTISPOOF_IFACE"; |
ip="`get_first_ip_addr IP_$ANTISPOOF_IFACE`"; |
echo -en "Accepting traceroute:" |
echo -en "Accepting traceroute:" |
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$IPTABLES -A OUTPUT -o $ANTISPOOF_IFACE -p UDP \ |
$IPTABLES -A OUTPUT -o $ANTISPOOF_IFACE -p UDP \ |
--sport $TRACEROUTE_SRC_PORTS --dport $TRACEROUTE_DEST_PORTS \ |
--sport $TRACEROUTE_SRC_PORTS --dport $TRACEROUTE_DEST_PORTS \ |
-s ${!ip} -d $ANYWHERE -j ACCEPT |
-s $ip -d $ANYWHERE -j ACCEPT |
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for iface in $TRACEROUTE_IFACE; do |
for iface in $TRACEROUTE_IFACE; do |
$IPTABLES -A FORWARD -p UDP -i $iface --sport $TRACEROUTE_SRC_PORTS \ |
$IPTABLES -A FORWARD -p UDP -i $iface --sport $TRACEROUTE_SRC_PORTS \ |
Riadok 546 allow_output() |
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Riadok 681 allow_output() |
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# Povolíme odchozí pakety, které mají naše IP adresy |
# Povolíme odchozí pakety, které mají naše IP adresy |
echo -en "Accepting OUTPUT packets from" |
echo -en "Accepting OUTPUT packets from" |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
IPS="IP_$iface"; |
echo -en " ${!ip}($iface)" |
for ip in ${!IPS}; do |
$IPTABLES -A OUTPUT -o $iface -s ${!ip} -j ACCEPT |
echo -en " $ip($iface)" |
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$IPTABLES -A OUTPUT -o $iface -s $ip -j ACCEPT |
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done |
done; |
done; |
echo " done."; |
echo " done."; |
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for type in $ACCEPT_ICMP_PACKETS; do |
for type in $ACCEPT_ICMP_PACKETS; do |
echo -en " $type" |
echo -en " $type" |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
IPS="IP_$iface"; |
$IPTABLES -A INPUT -i $iface -d ${!ip} -p ICMP --icmp-type $type -j ACCEPT |
for ip in ${!IPS}; do |
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$IPTABLES -A INPUT -i $iface -d $ip -p ICMP --icmp-type $type -j ACCEPT |
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done |
done |
done |
done |
done |
#$IPTABLES_LOG -A INPUT -p ICMP -j LOG --log-prefix "IN ICMP: " |
#$IPTABLES_LOG -A INPUT -p ICMP -j LOG --log-prefix "IN ICMP: " |
Riadok 610 log_forward_drop() |
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Riadok 749 log_forward_drop() |
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} # }}} |
} # }}} |
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configure_special_rules() |
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{ # {{{ |
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echo -en "Loading special rules: " |
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## |
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## for DSL from Slovanet (Slovak DSL provider) and DSL modem DLINK DSL-360T you must add following rule for proper ssh connect to your machine |
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## |
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# echo -en "slovanet " |
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# $IPTABLES -t mangle -A OUTPUT -s 0/0 -j DSCP --set-dscp 0 |
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echo " done."; |
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} # }}} |
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do_ip_accounting() |
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{ # {{{ |
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if [ ! "x$DO_LOCAL_IP_ACCOUNTING" = "xno" ]; then |
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if [ ! -z "$NAT_LAN_IFACE" ]; then |
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IPACCT_NAME="ZORBCOUNT" |
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IPACCT_IN_NAME="ZORBCOUNTIN" |
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IPACCT_OUT_NAME="ZORBCOUNTOUT" |
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$IPTABLES -N $IPACCT_NAME # whole network |
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$IPTABLES -N $IPACCT_IN_NAME # download: from server to client |
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$IPTABLES -A $IPACCT_IN_NAME |
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$IPTABLES -N $IPACCT_OUT_NAME # upload: from client to server |
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$IPTABLES -A $IPACCT_OUT_NAME |
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ip="`get_first_ip_addr IP_$NAT_SUBNET_IFACE`"; |
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netmask="Mask_$NAT_SUBNET_IFACE" |
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localnet="$ip/${!netmask}" |
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$IPTABLES -I INPUT -i $NAT_LAN_IFACE -j $IPACCT_IN_NAME |
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$IPTABLES -I OUTPUT -o $NAT_LAN_IFACE -j $IPACCT_OUT_NAME |
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$IPTABLES -I FORWARD -s $localnet -o $NAT_LAN_IFACE -j $IPACCT_NAME |
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$IPTABLES -I FORWARD -d $localnet -i $NAT_LAN_IFACE -j $IPACCT_NAME |
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for client_ip in $IP_ACCT_CLIENTS; do |
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$IPTABLES -A $IPACCT_NAME -s $client_ip |
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$IPTABLES -A $IPACCT_NAME -d $client_ip |
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done |
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if [ ! "x$DO_LOCAL_IP_ACCOUNTING" = "xno" ]; then |
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accountig_ports=`echo "$NAT_TCP_PORT_REDIRECT " | $AWK -v RS=' ' -v FS=: '{ print $2; }' | sort -u -r -g ` |
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for port in $accountig_ports; do |
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$IPTABLES -I INPUT -i $NAT_SUBNET_IFACE -p TCP --dport $port -j $IPACCT_NAME |
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$IPTABLES -I INPUT -i $NAT_SUBNET_IFACE -p UDP --dport $port -j $IPACCT_NAME |
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$IPTABLES -I OUTPUT -o $NAT_SUBNET_IFACE -p TCP --sport $port -j $IPACCT_NAME |
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$IPTABLES -I OUTPUT -o $NAT_SUBNET_IFACE -p UDP --sport $port -j $IPACCT_NAME |
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done |
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fi |
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$IPTABLES -A $IPACCT_NAME -s $localnet |
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$IPTABLES -A $IPACCT_NAME -d $localnet |
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fi |
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fi |
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} # }}} |
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accept_related() |
accept_related() |
{ # {{{ |
{ # {{{ |
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echo -en "Accepting ESTABLISHED, RELATED packets for IP:" |
echo -en "Accepting ESTABLISHED, RELATED packets for IP:" |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
ip="IP_$iface"; |
IPS="IP_$iface"; |
echo -en " ${!ip}($iface)" |
for ip in ${!IPS}; do |
$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT |
echo -en " $ip($iface)" |
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done |
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$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT |
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$IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT |
done |
done |
echo " done." |
echo " done." |
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Riadok 639 accept_loopback() |
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Riadok 842 accept_loopback() |
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parse_ifconfig() |
parse_ifconfig() |
{ # {{{ |
{ # {{{ |
# Parse output from ifconfig: |
# Parse output from ifconfig: |
eval `$IFCONFIG | \ |
parsed_interfaces=`$IFCONFIG | \ |
$AWK 'BEGIN { interfaces=""; } |
$AWK ' |
/^[a-zA-Z0-9]+[ \t]+/ { # Linux |
BEGIN { |
iface=$1; |
iface_count = 0; |
interfaces = sprintf("%s %s", interfaces, iface); |
} |
printf "\nIFACE_%s=\"%s\"; export IFACE_%s;\n", iface, iface, iface; |
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printf "HWaddr_%s=\"%s\"; export HWaddr_%s;\n", iface, $5, iface; |
/^[a-zA-Z0-9:]+[ \t]+/ { # Linux interface |
} |
split($1, fields, ":"); |
/^[ \t]+inet addr:/ { # Linux |
iface = fields[1]; |
split($0, fields, "[ \t:]+"); |
ipcount[iface]++; |
printf "IP_%s=\"%s\"; export IP_%s;\n", iface, fields[4], iface; |
hwaddr[iface] = $NF; |
printf "Bcast_%s=\"%s\"; export Bcast_%s;\n", iface, fields[6], iface; |
iface_count++; |
printf "Mask_%s=\"%s\"; export Mask_%s;\n", iface, fields[8], iface; |
} |
} |
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/^[a-zA-Z0-9]+:/ { # FreeBSD |
/^[ \t]+inet addr:/ { # Linux IP address |
iface = $1; |
split($0, fields, "[ \t:]+"); |
sub(":", "", iface); |
ip[iface, ipcount[iface]] = fields[4]; |
interfaces = sprintf("%s %s", interfaces, iface); |
bcast[iface] = fields[6]; # bad for loopback interface, but we don t need this |
printf "\nIFACE_%s=\"%s\"; export IFACE_%s;\n", iface, iface, iface; |
# try to upgrade gawk (3.1.4-2.0.1 => 3.1.5-1) if you experience problem on the next line |
} |
# awk: cmd. line:17: (FILENAME=- FNR=2) fatal: attempt to use array "fields" in a scalar context |
/^[ \t]+inet [0-9]+/ { # FreeBSD |
idx = length(fields); |
printf "IP_%s=\"%s\"; export IP_%s;\n", iface, $2, iface; |
mask[iface] = fields[idx]; |
printf "Bcast_%s=\"%s\"; export Bcast_%s;\n", iface, $6, iface; |
} |
printf "Mask_%s=\"%s\"; export Mask_%s;\n", iface, $4, iface; |
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} |
/^[ \t]+inet6 addr:/ { # Linux IPv6 address |
/^[ \t]+ether/ { # FreeBSD |
split($0, fields, "[ \t]+"); |
printf "HWaddr_%s=\"%s\"; export HWaddr_%s;\n", iface, $2, iface; |
ip6[iface] = fields[4]; |
} |
scope6[iface] = fields[5]; |
END { printf "\ninterfaces=\"%s\"; export interfaces;\n", interfaces; } |
} |
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|
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END { |
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for (i in ip6) { printf "IFACE_6_%s=\"%s\"; export IFACE_6_%s;\n", i, ip6[i], i; } |
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for (i in scope6) { printf "SCOPE_6_%s=\"%s\"; export SCOPE_6_%s;\n", i, scope6[i], i; } |
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for (i in bcast) { printf "Bcast_%s=\"%s\"; export Bcast_%s;\n", i, bcast[i], i; } |
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for (i in mask) { printf "Mask_%s=\"%s\"; export Mask_%s;\n", i, mask[i], i; } |
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for (i in hwaddr) { printf "HWaddr_%s=\"%s\"; export HWaddr_%s;\n", i, hwaddr[i], i; } |
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for (i in ipcount) { printf "IPcount_%s=\"%s\"; export IPcount_%s;\n", i, ipcount[i], i; } |
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for (i in ipcount) { |
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printf "IP_%s=\"", i; |
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for (n = 1; n <= ipcount[i]; n++) { |
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printf "%s ", ip[i, n]; |
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} |
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printf "\"; export IP_%s;\n", i; |
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} |
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printf "interfaces=\""; |
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for (i in ipcount) { printf "%s ", i; } |
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printf "\"; export interfaces;\n"; |
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} |
'` |
'` |
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eval "$parsed_interfaces"; |
|
|
eval `perl -e ' |
parsed_routes=`perl -e ' |
$\ = "\n"; |
$\ = "\n"; |
open(FILE, "/proc/net/route") or die "Can not open /proc/net/route: $!"; |
open(FILE, "/proc/net/route") or die "Can not open /proc/net/route: $!"; |
my @columns = split(/\s+/, <FILE>); |
my @columns = split(/\s+/, <FILE>); |
Riadok 717 parse_ifconfig() |
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Riadok 940 parse_ifconfig() |
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|
|
} # }}} |
} # }}} |
'` |
'` |
|
eval "$parsed_routes"; |
|
|
# Now we have defined variables like this: |
# Now we have defined variables like this: |
# IFACE_eth0 HWaddr_eth0 IP_eth0 Bcast_eth0 Mask_eth0 |
# IFACE_eth0 HWaddr_eth0 IP_eth0 Bcast_eth0 Mask_eth0 |
# IFACE_lo HWaddr_lo IP_lo Bcast_lo Mask_lo |
# IFACE_lo HWaddr_lo IP_lo Bcast_lo Mask_lo |
|
|
start) |
start) |
echo -n "Starting $DESC: " |
echo -n "Starting $DESC: " |
# Inicialize modules |
# Inicialize modules |
$DEPMOD -a |
#$DEPMOD -a |
load_modules |
load_modules |
|
load_cache |
set_default_policy |
set_default_policy |
remove_chains |
remove_chains |
# |
# |
|
|
nmap_scan_filter |
nmap_scan_filter |
invalid_packet_filter |
invalid_packet_filter |
anti_spoof_filter |
anti_spoof_filter |
syn_flood |
#syn_flood |
mangle_prerouting |
mangle_prerouting |
mangle_output |
mangle_output |
|
accept_related |
log_new_connections |
log_new_connections |
drop_output |
drop_output |
allow_input |
allow_input |
allow_output |
allow_output |
allow_icmp |
allow_icmp |
accept_related |
|
accept_loopback |
accept_loopback |
masquerade |
masquerade |
log_input_drop |
log_input_drop |
log_output_drop |
log_output_drop |
log_forward_drop |
log_forward_drop |
|
forward_on |
|
do_ip_accounting |
|
configure_special_rules |
|
$IPTABLES_SAVE -c > $CACHE_FILE |
;; |
;; |
|
|
stop) |
stop) |
|
|
remove_chains |
remove_chains |
unload_modules |
unload_modules |
forward_off |
forward_off |
|
accept_related |
|
;; |
|
|
|
really-off) |
|
echo -n "Stopping $DESC: removing ALL rules, all packets are dropped !!" |
|
set_default_policy |
|
remove_chains |
|
unload_modules |
|
forward_off |
;; |
;; |
|
|
status) |
status) |
|
|
$IPTABLES -L -nv |
$IPTABLES -L -nv |
;; |
;; |
|
|
|
purge) |
|
find $DEFAULT_CACHE_DIR -type f -ls -exec rm -f {} \; |
|
;; |
|
|
*) |
*) |
echo "Usage: $0 {start|stop|status}" >&2 |
echo "Usage: $0 {start|stop|really-off|status|purge}" >&2 |
exit 1 |
exit 1 |
;; |
;; |
esac |
esac |