verzia 2.55, 2008/01/17 22:12:34 |
verzia 2.58, 2008/04/13 19:27:00 |
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# 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 2.54 2008-01-17 21:47:44 rajo Exp $ |
# $Platon: scripts/shell/firewall/fw-universal.sh,v 2.57 2008-02-02 22:57:54 rajo Exp $ |
# |
# |
# Changelog: |
# Changelog: |
# 2003-10-24 - created |
# 2003-10-24 - created |
Riadok 33 if [ "x$1" = "xblock" ] || [ "x$QUIET" = |
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Riadok 33 if [ "x$1" = "xblock" ] || [ "x$QUIET" = |
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else |
else |
print_info() |
print_info() |
{ |
{ |
echo $* |
echo "$@" |
} |
} |
fi |
fi |
# }}} |
# }}} |
Riadok 73 RMMOD="${RMMOD:=/sbin/rmmod}" |
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Riadok 73 RMMOD="${RMMOD:=/sbin/rmmod}" |
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AWK="${AWK:=/usr/bin/awk}" |
AWK="${AWK:=/usr/bin/awk}" |
PERL="${PERL:=/usr/bin/perl}" |
PERL="${PERL:=/usr/bin/perl}" |
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# shaping |
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TC="${TC:=/sbin/tc}" |
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# loopback interface |
# loopback interface |
LO_IFACE="${LO_IFACE:=lo}" |
LO_IFACE="${LO_IFACE:=lo}" |
# Hide NAT clients behind firewall |
# Hide NAT clients behind firewall |
NAT_SET_TTL="${NAT_SET_TTL:=no}" |
NAT_SET_TTL="${NAT_SET_TTL:=no}" |
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# reject config |
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ALL_REJECT_INPUT_TCP="${ALL_REJECT_INPUT_TCP:=113}" # by default reject connections to AUTH server |
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REJECT_WITH="${REJECT_WITH:=tcp-reset}" |
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# |
# |
# CONSTANTS - Do not edit |
# CONSTANTS - Do not edit |
# |
# |
Riadok 625 reject_input() |
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Riadok 632 reject_input() |
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for port in $ALL_REJECT_INPUT_TCP; do |
for port in $ALL_REJECT_INPUT_TCP; do |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
print_info -en " $port($iface)" |
print_info -en " $port($iface)" |
$IPTABLES -A INPUT -i $iface -p TCP --dport $port -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $iface -p TCP --dport $port -j REJECT --reject-with $REJECT_WITH |
done |
done |
done |
done |
print_info " done." |
print_info " done." |
Riadok 635 reject_input() |
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Riadok 642 reject_input() |
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for port in $ALL_REJECT_INPUT_UDP; do |
for port in $ALL_REJECT_INPUT_UDP; do |
for iface in $INTERFACES; do |
for iface in $INTERFACES; do |
print_info -en " $port($iface)" |
print_info -en " $port($iface)" |
$IPTABLES -A INPUT -i $iface -p UDP --dport $port -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $iface -p UDP --dport $port -j REJECT --reject-with $REJECT_WITH |
done |
done |
done |
done |
print_info " done." |
print_info " done." |
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print_info -en " $port"`[ ! -z $src_ip ] && echo "[$src_ip]"` |
print_info -en " $port"`[ ! -z $src_ip ] && echo "[$src_ip]"` |
for ip in ${!IPS}; do |
for ip in ${!IPS}; do |
if [ -z $src_ip ]; then |
if [ -z $src_ip ]; then |
$IPTABLES -A INPUT -i $iface -d $ip -p TCP --dport $port -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $iface -d $ip -p TCP --dport $port -j REJECT --reject-with $REJECT_WITH |
else |
else |
$IPTABLES -A INPUT -i $iface -s $src_ip -d $ip -p TCP --dport $port -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $iface -s $src_ip -d $ip -p TCP --dport $port -j REJECT --reject-with $REJECT_WITH |
fi |
fi |
done |
done |
done |
done |
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print_info -en " $port"`[ ! -z $src_ip ] && echo "[$src_ip]"` |
print_info -en " $port"`[ ! -z $src_ip ] && echo "[$src_ip]"` |
for ip in ${!IPS}; do |
for ip in ${!IPS}; do |
if [ -z $src_ip ]; then |
if [ -z $src_ip ]; then |
$IPTABLES -A INPUT -i $iface -d $ip -p UDP --dport $port -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $iface -d $ip -p UDP --dport $port -j REJECT --reject-with $REJECT_WITH |
else |
else |
$IPTABLES -A INPUT -i $iface -s $src_ip -d $ip -p UDP --dport $port -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $iface -s $src_ip -d $ip -p UDP --dport $port -j REJECT --reject-with $REJECT_WITH |
fi |
fi |
done |
done |
done |
done |
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{ # {{{ |
{ # {{{ |
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print_info -en "Accepting ICMP packets:" |
print_info -en "Accepting ICMP packets:" |
# Službu AUTH není dobré filtrovat pomocí DROP, protože to může |
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# vést k prodlevám při navazování některých spojení. Proto jej |
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# sice zamítneme, ale vygenerujeme korektní ICMP chybovou zprávu |
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$IPTABLES -A INPUT -p TCP --dport 113 -j REJECT --reject-with tcp-reset #AUTH server |
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# accept only allowed ICMP packets |
# accept only allowed ICMP packets |
for type in $ACCEPT_ICMP_PACKETS; do |
for type in $ACCEPT_ICMP_PACKETS; do |
Riadok 986 accept_loopback() |
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Riadok 989 accept_loopback() |
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} # }}} |
} # }}} |
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# |
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# Shaping support {{{ |
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# |
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# http://koti.welho.com/ntoivol2/shaping/ |
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# |
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shaping_on() |
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{ # {{{ |
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mark_idx=1 |
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if [ ! -z $SHAPING_IFACE ]; then |
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for iface in $SHAPING_IFACE; do |
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echo "Shaping for interface $iface" |
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shaping_classes="${iface}_SHAPING_CLASSES" |
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# root qdisc: 2-band prio with everything defaulting to band 0 |
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$TC qdisc add dev $iface root handle 1: prio bands 2 priomap 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 |
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for class in ${!shaping_classes}; do |
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rate="${iface}_SHAPING_RATE_${class}" |
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latency="${iface}_SHAPING_LATENCY_${class}" |
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burst="${iface}_SHAPING_BURST_${class}" |
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netmask="${iface}_SHAPING_NETMASK_${class}" |
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echo -e "\tshaping \"$class\" traffic: rate=${!rate} burst=${!burst} netmask=${!netmask}" |
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if [ -z ${!netmask} ]; then |
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$IPTABLES -t mangle -A OUTPUT -j MARK --set-mark 0x$mark_idx |
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else |
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$IPTABLES -t mangle -A OUTPUT -d ${!netmask} -j MARK --set-mark 0x$mark_idx |
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fi |
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if [ -z ${!rate} ]; then |
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# SFQ for local traffic |
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$TC qdisc add dev $iface parent 1:$mark_idx handle $((10 + $mark_idx)): sfq perturb 10 |
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else |
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# TBF shaping and SFQ for internet traffic |
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$TC qdisc add dev $iface parent 1:$mark_idx handle $((10 + $mark_idx)): tbf rate ${!rate} burst ${!burst} latency ${!latency} |
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$TC qdisc add dev $iface parent $((10 + $mark_idx)): handle $((10 * $mark_idx)): sfq perturb 10 |
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fi |
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mark_idx=$(($mark_idx + 1)) |
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done |
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done |
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fi |
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} # }}} |
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shaping_off() |
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{ # {{{ |
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if [ ! -z $SHAPING_IFACE ]; then |
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echo -en "Shaping turned off for interface" |
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for iface in $SHAPING_IFACE; do |
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echo -en " $iface" |
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$TC qdisc del dev $iface root 2>/dev/null |
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done |
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echo ". done" |
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fi |
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} # }}} |
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shaping_status() |
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{ # {{{ |
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if [ ! -z $SHAPING_IFACE ]; then |
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echo "# Shaping status: " |
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$TC qdisc list |
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else |
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echo "# Shaping turned off" |
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fi |
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} # }}} |
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# }}} |
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add_banned_ip() |
add_banned_ip() |
{ # {{{ |
{ # {{{ |
echo "# `date '+%Y-%m-%d %X' ` - ${SSH_CLIENT:=local}" >> $DEFAULT_FIREWALL_CONFIG_DIR/BANNED_IP.conf |
echo "# `date '+%Y-%m-%d %X' ` - ${SSH_CLIENT:=local}" >> $DEFAULT_FIREWALL_CONFIG_DIR/BANNED_IP.conf |
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log_forward_drop |
log_forward_drop |
forward_on |
forward_on |
do_ip_accounting |
do_ip_accounting |
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shaping_off |
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shaping_on |
configure_special_rules |
configure_special_rules |
$IPTABLES_SAVE -c > $CACHE_FILE |
$IPTABLES_SAVE -c > $CACHE_FILE |
;; |
;; |
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stop) |
stop) |
print_info -n "Stopping $DESC: " |
print_info -n "Stopping $DESC: " |
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shaping_off |
set_default_policy |
set_default_policy |
remove_chains |
remove_chains |
unload_modules |
unload_modules |
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status) |
status) |
print_iface_status; echo |
print_iface_status; echo |
$IPTABLES -L -nv |
$IPTABLES -L -nv |
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shaping_status |
;; |
;; |
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purge) |
purge) |