verzia 2.85, 2011/12/03 19:28:30 |
verzia 2.96, 2013/09/23 08:40:34 |
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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 2.84 2011-11-18 23:58:33 rajo Exp $ |
# $Platon: scripts/shell/firewall/fw-universal.sh,v 2.95 2013-09-21 03:01:24 nepto Exp $ |
# |
# |
# Changelog: |
# Changelog: |
# 2003-10-24 - created |
# 2003-10-24 - created |
Riadok 76 IPTABLES="${IPTABLES:=$DEBUG/sbin/iptabl |
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Riadok 76 IPTABLES="${IPTABLES:=$DEBUG/sbin/iptabl |
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IPTABLES_SAVE="${IPTABLES_SAVE:=$DEBUG/sbin/iptables-save}" |
IPTABLES_SAVE="${IPTABLES_SAVE:=$DEBUG/sbin/iptables-save}" |
IPTABLES_RESTORE="${IPTABLES_RESTORE:=$DEBUG/sbin/iptables-restore}" |
IPTABLES_RESTORE="${IPTABLES_RESTORE:=$DEBUG/sbin/iptables-restore}" |
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IPTABLES_TABLES="${IPTABLES_TABLES:=filter nat mangle}" |
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if [ "x$LOGGING" = "xoff" ]; then |
if [ "x$LOGGING" = "xoff" ]; then |
IPTABLES_LOG=": log turned off" |
IPTABLES_LOG=": log turned off" |
else |
else |
Riadok 91 PERL="${PERL:=/usr/bin/perl}" |
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Riadok 94 PERL="${PERL:=/usr/bin/perl}" |
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# shaping |
# shaping |
TC="${TC:=/sbin/tc}" |
TC="${TC:=/sbin/tc}" |
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# update script |
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UPDATE_SCRIPT="${UPDATE_SCRIPT:=update_from_cvs}" |
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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 |
Riadok 282 remove_chains() |
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Riadok 288 remove_chains() |
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$IPTABLES --flush spoof |
$IPTABLES --flush spoof |
# TODO!!! |
# TODO!!! |
else |
else |
for table in filter nat mangle; do |
for table in $IPTABLES_TABLES; do |
$IPTABLES -t $table -F # clear all chains |
$IPTABLES -t $table -F # clear all chains |
$IPTABLES -t $table -X # remove all chains |
$IPTABLES -t $table -X # remove all chains |
$IPTABLES -t $table -Z # zero counts |
$IPTABLES -t $table -Z # zero counts |
Riadok 344 invalid_packet_filter() |
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Riadok 350 invalid_packet_filter() |
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print_info -ne " XEN_MODE "; |
print_info -ne " XEN_MODE "; |
continue; |
continue; |
fi |
fi |
$IPTABLES_LOG -A $chain -m state --state INVALID $LOG_LIMIT "INVALID $chain: " |
$IPTABLES_LOG -A $chain -m conntrack --ctstate INVALID $LOG_LIMIT "INVALID $chain: " |
print_info -en "." |
print_info -en "." |
$IPTABLES -A $chain -m state --state INVALID -j DROP |
$IPTABLES -A $chain -m conntrack --ctstate INVALID -j DROP |
print_info -en "." |
print_info -en "." |
done |
done |
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$IPTABLES -A INPUT -i $riface -p TCP --syn -j syn-flood |
$IPTABLES -A INPUT -i $riface -p TCP --syn -j syn-flood |
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# packet is marked az NEW, but doesn't have SYN flag - drop it |
# packet is marked az NEW, but doesn't have SYN flag - drop it |
$IPTABLES -A INPUT -i $riface -p TCP ! --syn -m state --state NEW -j DROP |
$IPTABLES -A INPUT -i $riface -p TCP ! --syn -m conntrack --ctstate NEW -j DROP |
done |
done |
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Riadok 455 mangle_output() |
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Riadok 461 mangle_output() |
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masquerade() |
masquerade() |
{ # {{{ |
{ # {{{ |
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if [ -z "$NAT_LAN_IFACE" ]; then |
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return; |
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fi |
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print_info -en "NAT: Masquerading local subnet: $NAT_SUBNET_IFACE --> $NAT_LAN_IFACE" |
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if [ "X$XEN_MODE" = "Xon" ]; then |
if [ "X$XEN_MODE" = "Xon" ]; then |
print_info "XEN_MODE enabled: masquerade is not supported in this mode"; |
if [ -n "$NAT_SUBNET_SRC" ]; then |
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NAT_SUBNET_SRC="-s $NAT_SUBNET_SRC"; |
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fi |
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$IPTABLES -t nat -A POSTROUTING -o $NAT_LAN_IFACE -j MASQUERADE $NAT_SUBNET_SRC |
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print_info " done." |
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print_info "XEN_MODE enabled: masquerade is limited to basic functionality only"; |
return; |
return; |
fi |
fi |
if [ ! -z "$NAT_LAN_IFACE" ]; then |
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print_info -en "NAT: Enabling packet forwarding..." |
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echo 1 > /proc/sys/net/ipv4/ip_forward |
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print_info " done." |
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print_info -en "NAT: Masquerading local subnet: $NAT_SUBNET_IFACE --> $NAT_LAN_IFACE" |
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ip="`get_first_ip_addr IP_$NAT_SUBNET_IFACE`" |
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netmask="Mask_$NAT_SUBNET_IFACE" |
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localnet="$ip/${!netmask}" |
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lan_ip="`get_first_ip_addr IP_$NAT_LAN_IFACE`" |
ip="`get_first_ip_addr IP_$NAT_SUBNET_IFACE`" |
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netmask="Mask_$NAT_SUBNET_IFACE" |
# alow packets from private subnet |
localnet="$ip/${!netmask}" |
$IPTABLES -A FORWARD -s ! $localnet -i $NAT_SUBNET_IFACE -j DROP |
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for client_ip in $NAT_CLIENT_DROP; do |
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print_info -en " !$client_ip"; |
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$IPTABLES -A FORWARD -s $client_ip -i $NAT_SUBNET_IFACE -j DROP |
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done |
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for redirect in $NAT_TCP_PORT_REDIRECT; do |
lan_ip="`get_first_ip_addr IP_$NAT_LAN_IFACE`" |
#eval `echo $redirect | $AWK -v FS=: '{ printf "remote_port=%s; local_port=%s;", $1, $2; }'` |
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eval `echo $redirect | \ |
# alow packets from private subnet |
$AWK -v FS=: ' (NF == 2) { remote_ip = "$lan_ip"; remote_port = $1; local_port = $2; } \ |
$IPTABLES -A FORWARD -s ! $localnet -i $NAT_SUBNET_IFACE -j DROP |
(NF == 3) { remote_ip = $2; remote_port = $1; local_port = $3; } \ |
for client_ip in $NAT_CLIENT_DROP; do |
END { printf "remote_ip=%s; remote_port=%s; local_port=%s;", remote_ip, remote_port, local_port; }'` |
print_info -en " !$client_ip"; |
print_info -en " $remote_port>>$remote_ip:$local_port(tcp)" |
$IPTABLES -A FORWARD -s $client_ip -i $NAT_SUBNET_IFACE -j DROP |
$IPTABLES -t nat -A PREROUTING -p TCP \ |
done |
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for redirect in $NAT_TCP_PORT_REDIRECT; do |
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#eval `echo $redirect | $AWK -v FS=: '{ printf "remote_port=%s; local_port=%s;", $1, $2; }'` |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 2) { remote_ip = "$lan_ip"; remote_port = $1; local_port = $2; } \ |
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(NF == 3) { remote_ip = $2; remote_port = $1; local_port = $3; } \ |
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END { printf "remote_ip=%s; remote_port=%s; local_port=%s;", remote_ip, remote_port, local_port; }'` |
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print_info -en " $remote_port>>$remote_ip:$local_port(tcp)" |
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$IPTABLES -t nat -A PREROUTING -p TCP \ |
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-i $NAT_SUBNET_IFACE \ |
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--dport $remote_port -j REDIRECT --to-port $local_port |
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done |
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for redirect in $NAT_UDP_PORT_REDIRECT; do |
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#eval `echo $redirect | $AWK -v FS=: '{ printf "remote_port=%s; local_port=%s;", $1, $2; }'` |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 2) { dnat = "no" ; remote_ip = "X"; remote_port = $1; local_port = $2; } \ |
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(NF == 3) { dnat = "yes" ; remote_ip = $2; remote_port = $1; local_port = $3; } \ |
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END { printf "dnat=%s; remote_ip=%s; remote_port=%s; local_port=%s;", dnat, remote_ip, remote_port, local_port; }'` |
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print_info -en " $remote_port>>$remote_ip:$local_port(udp)" |
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if [ "x$dnat" = "xyes" ]; then |
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$IPTABLES -t nat -A PREROUTING -p UDP -i $NAT_SUBNET_IFACE -d ! $ip \ |
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--dport $local_port -j DNAT --to $remote_ip:$remote_port |
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$IPTABLES -A FORWARD -p UDP -i $NAT_SUBNET_IFACE -d ! $ip --dport $local_port -j ACCEPT |
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else |
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$IPTABLES -t nat -A PREROUTING -p UDP \ |
-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 |
fi |
for redirect in $NAT_UDP_PORT_REDIRECT; do |
done |
#eval `echo $redirect | $AWK -v FS=: '{ printf "remote_port=%s; local_port=%s;", $1, $2; }'` |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 2) { dnat = "no" ; remote_ip = "X"; remote_port = $1; local_port = $2; } \ |
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(NF == 3) { dnat = "yes" ; remote_ip = $2; remote_port = $1; local_port = $3; } \ |
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END { printf "dnat=%s; remote_ip=%s; remote_port=%s; local_port=%s;", dnat, remote_ip, remote_port, local_port; }'` |
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print_info -en " $remote_port>>$remote_ip:$local_port(udp)" |
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if [ "x$dnat" = "xyes" ]; then |
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$IPTABLES -t nat -A PREROUTING -p UDP -i $NAT_SUBNET_IFACE -d ! $ip \ |
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--dport $local_port -j DNAT --to $remote_ip:$remote_port |
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$IPTABLES -A FORWARD -p UDP -i $NAT_SUBNET_IFACE -d ! $ip --dport $local_port -j ACCEPT |
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else |
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$IPTABLES -t nat -A PREROUTING -p UDP \ |
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-i ! $NAT_LAN_IFACE -d ! $lan_ip \ |
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--dport $remote_port -j REDIRECT --to-port $local_port |
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fi |
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done |
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#$IPTABLES -t nat -A POSTROUTING -s $localnet -o $NAT_LAN_IFACE -j MASQUERADE |
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$IPTABLES -t nat -A POSTROUTING -o $NAT_LAN_IFACE -j MASQUERADE |
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print_info " done." |
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# don't forward Miscrosoft protocols - NOT RFC compliant packets |
if [ -n "$NAT_SUBNET_SRC" ]; then |
if [ ! -z "$NAT_FORWARD_MICROSOFT" ]; then |
NAT_SUBNET_SRC="-s $NAT_SUBNET_SRC"; |
if [ "x$NAT_FORWARD_MICROSOFT" = "xno" ]; then |
fi |
$IPTABLES -A FORWARD -p TCP ! --syn -m state --state NEW -j DROP |
$IPTABLES -t nat -A POSTROUTING -o $NAT_LAN_IFACE -j MASQUERADE $NAT_SUBNET_SRC |
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for port in 67 68 69 135 445 1434 6667; do |
print_info " done." |
$IPTABLES -A FORWARD -p TCP --dport $port -j DROP |
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$IPTABLES -A FORWARD -p UDP --dport $port -j DROP |
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done |
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fi |
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fi |
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if [ ! -z "$NAT_FORWARD_TCP_PORTS" ]; then |
# don't forward Miscrosoft protocols - NOT RFC compliant packets |
print_info -en "\tAccepting FORWARD TCP ports:" |
if [ ! -z "$NAT_FORWARD_MICROSOFT" ]; then |
for port in $NAT_FORWARD_TCP_PORTS; do |
if [ "x$NAT_FORWARD_MICROSOFT" = "xno" ]; then |
print_info -en " $port" |
$IPTABLES -A FORWARD -p TCP ! --syn -m conntrack --ctstate NEW -j DROP |
$IPTABLES -A FORWARD -p TCP --dport $port -m state --state NEW -j ACCEPT |
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done |
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print_info " done." |
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fi |
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if [ ! -z "$NAT_FORWARD_UDP_PORTS" ]; then |
for port in 67 68 69 135 445 1434 6667; do |
print_info -en "\tAccepting FORWARD UDP ports:" |
$IPTABLES -A FORWARD -p TCP --dport $port -j DROP |
for port in $NAT_FORWARD_UDP_PORTS; do |
$IPTABLES -A FORWARD -p UDP --dport $port -j DROP |
print_info -en " $port" |
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$IPTABLES -A FORWARD -p UDP --dport $port -m state --state NEW -j ACCEPT |
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done |
done |
print_info " done." |
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fi |
fi |
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fi |
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# NAT_FORWARD_TCP_HOSTS {{{ |
if [ ! -z "$NAT_FORWARD_TCP_PORTS" ]; then |
if [ ! -z "$NAT_FORWARD_TCP_HOSTS" ]; then |
print_info -en "\tAccepting FORWARD TCP ports:" |
print_info -en "\tAccepting FORWARD TCP hosts:" |
for port in $NAT_FORWARD_TCP_PORTS; do |
for host in $NAT_FORWARD_TCP_HOSTS; do |
print_info -en " $port" |
print_info -en " $host" |
$IPTABLES -A FORWARD -p TCP --dport $port -m conntrack --ctstate NEW -j ACCEPT |
$IPTABLES -A FORWARD -p TCP -d $host -m state --state NEW -j ACCEPT |
done |
done |
print_info " done." |
print_info " done." |
fi |
fi |
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# }}} |
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# NAT_FORWARD_UDP_HOSTS {{{ |
if [ ! -z "$NAT_FORWARD_UDP_PORTS" ]; then |
if [ ! -z "$NAT_FORWARD_UDP_HOSTS" ]; then |
print_info -en "\tAccepting FORWARD UDP ports:" |
print_info -en "\tAccepting FORWARD UDP hosts:" |
for port in $NAT_FORWARD_UDP_PORTS; do |
for host in $NAT_FORWARD_UDP_HOSTS; do |
print_info -en " $port" |
print_info -en " $host" |
$IPTABLES -A FORWARD -p UDP --dport $port -m conntrack --ctstate NEW -j ACCEPT |
$IPTABLES -A FORWARD -p UDP -d $host -m state --state NEW -j ACCEPT |
done |
done |
print_info " done." |
print_info " done." |
fi |
fi |
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# }}} |
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# NAT_FORWARD_TCP_CLIENTS {{{ |
# NAT_FORWARD_TCP_HOSTS {{{ |
if [ ! -z "$NAT_FORWARD_TCP_CLIENTS" ]; then |
if [ ! -z "$NAT_FORWARD_TCP_HOSTS" ]; then |
print_info -en "\tAccepting FORWARD TCP clients:" |
print_info -en "\tAccepting FORWARD TCP hosts:" |
for client in $NAT_FORWARD_TCP_CLIENTS; do |
for host in $NAT_FORWARD_TCP_HOSTS; do |
print_info -en " $client" |
print_info -en " $host" |
$IPTABLES -A FORWARD -p TCP -s $client -m state --state NEW -j ACCEPT |
$IPTABLES -A FORWARD -p TCP -d $host -m conntrack --ctstate NEW -j ACCEPT |
done |
done |
print_info " done." |
print_info " done." |
fi |
fi |
# }}} |
# }}} |
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# NAT_FORWARD_UDP_CLIENTS {{{ |
# NAT_FORWARD_UDP_HOSTS {{{ |
if [ ! -z "$NAT_FORWARD_UDP_CLIENTS" ]; then |
if [ ! -z "$NAT_FORWARD_UDP_HOSTS" ]; then |
print_info -en "\tAccepting FORWARD UDP clients:" |
print_info -en "\tAccepting FORWARD UDP hosts:" |
for client in $NAT_FORWARD_UDP_CLIENTS; do |
for host in $NAT_FORWARD_UDP_HOSTS; do |
print_info -en " $client" |
print_info -en " $host" |
$IPTABLES -A FORWARD -p UDP -s $client -m state --state NEW -j ACCEPT |
$IPTABLES -A FORWARD -p UDP -d $host -m conntrack --ctstate NEW -j ACCEPT |
done |
done |
print_info " done." |
print_info " done." |
fi |
fi |
# }}} |
# }}} |
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print_info -en "\tAccepting ICMP packets:" |
# NAT_FORWARD_TCP_CLIENTS {{{ |
for type in $ACCEPT_ICMP_PACKETS; do |
if [ ! -z "$NAT_FORWARD_TCP_CLIENTS" ]; then |
print_info -en " $type" |
print_info -en "\tAccepting FORWARD TCP clients:" |
$IPTABLES -A FORWARD -p ICMP --icmp-type $type -j ACCEPT |
for client in $NAT_FORWARD_TCP_CLIENTS; do |
done |
print_info -en " $client" |
#$IPTABLES_LOG -A FORWARD -p ICMP -j LOG --log-prefix "FWD ICMP: " |
$IPTABLES -A FORWARD -p TCP -s $client -m conntrack --ctstate NEW -j ACCEPT |
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done |
print_info " done." |
print_info " done." |
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fi |
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# }}} |
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# Port forwarding to local machines |
# NAT_FORWARD_UDP_CLIENTS {{{ |
if [ ! -z "$NAT_TCP_PORT_FORWARD" ]; then |
if [ ! -z "$NAT_FORWARD_UDP_CLIENTS" ]; then |
print_info -en "\tForwarding TCP ports to local machines:" |
print_info -en "\tAccepting FORWARD UDP clients:" |
for redirect in $NAT_TCP_PORT_FORWARD; do |
for client in $NAT_FORWARD_UDP_CLIENTS; do |
#eval `echo $redirect | $AWK -v FS=: '{ printf "src_port=%s; local_machine=%s; dest_port=%s;", $1, $2, $3; }'` |
print_info -en " $client" |
eval `echo $redirect | \ |
$IPTABLES -A FORWARD -p UDP -s $client -m conntrack --ctstate NEW -j ACCEPT |
$AWK -v FS=: ' (NF == 3) { src_ip = "$lan_ip" ; src_port = $1; local_machine = $2; dest_port = $3; } \ |
done |
(NF == 4) { src_ip = $1 ; src_port = $2; local_machine = $3; dest_port = $4; } \ |
print_info " done." |
END { printf "src_ip=%s; src_port=%s; local_machine=%s; dest_port=%s;", src_ip, src_port, local_machine, dest_port; }'` |
fi |
print_info -en " $src_ip:$src_port -> $local_machine:$dest_port" |
# }}} |
$IPTABLES -t nat -A PREROUTING -p TCP -i $NAT_LAN_IFACE -d $src_ip \ |
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--dport $src_port -j DNAT --to $local_machine:$dest_port |
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$IPTABLES -A FORWARD -p TCP -i $NAT_LAN_IFACE -d $local_machine --dport $dest_port -j ACCEPT |
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done |
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print_info " done." |
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fi |
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if [ ! -z "$NAT_UDP_PORT_FORWARD" ]; then |
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print_info -en "\tForwarding UDP ports to local machines:" |
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for redirect in $NAT_UDP_PORT_FORWARD; do |
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#eval `echo $redirect | $AWK -v FS=: '{ printf "src_port=%s; local_machine=%s; dest_port=%s;", $1, $2, $3; }'` |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 3) { src_ip = "$lan_ip" ; src_port = $1; local_machine = $2; dest_port = $3; } \ |
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(NF == 4) { src_ip = $1 ; src_port = $2; local_machine = $3; dest_port = $4; } \ |
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END { printf "src_ip=%s; src_port=%s; local_machine=%s; dest_port=%s;", src_ip, src_port, local_machine, dest_port; }'` |
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print_info -en " $src_port -> $local_machine:$dest_port" |
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$IPTABLES -t nat -A PREROUTING -p UDP -i $NAT_LAN_IFACE -d $lan_ip \ |
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--dport $src_port -j DNAT --to $local_machine:$dest_port |
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$IPTABLES -A FORWARD -p UDP -i $NAT_LAN_IFACE -d $local_machine --dport $dest_port -j ACCEPT |
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done |
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print_info " done." |
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fi |
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# Keep state of connections from private subnets |
print_info -en "\tAccepting ICMP packets:" |
$IPTABLES -A OUTPUT -m state --state NEW -o $NAT_LAN_IFACE -j ACCEPT |
for type in $ACCEPT_ICMP_PACKETS; do |
#$IPTABLES -A FORWARD -m state --state NEW -o $NAT_LAN_IFACE -j ACCEPT |
print_info -en " $type" |
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT |
$IPTABLES -A FORWARD -p ICMP --icmp-type $type -j ACCEPT |
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done |
# hide NAT clients behind firewall: - set TTL |
#$IPTABLES_LOG -A FORWARD -p ICMP -j LOG --log-prefix "FWD ICMP: " |
# XXX: warning: this breaks traceroute !!! |
print_info " done." |
if [ ! "a$NAT_SET_TTL" = "ano" ]; then |
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print_info "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 $NAT_SET_TTL |
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fi |
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# Port forwarding to local machines |
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if [ ! -z "$NAT_TCP_PORT_FORWARD" ]; then |
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print_info -en "\tForwarding TCP ports to local machines:" |
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for redirect in $NAT_TCP_PORT_FORWARD; do |
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#eval `echo $redirect | $AWK -v FS=: '{ printf "src_port=%s; local_machine=%s; dest_port=%s;", $1, $2, $3; }'` |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 3) { src_ip = "$lan_ip" ; src_port = $1; local_machine = $2; dest_port = $3; } \ |
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(NF == 4) { src_ip = $1 ; src_port = $2; local_machine = $3; dest_port = $4; } \ |
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END { printf "src_ip=%s; src_port=%s; local_machine=%s; dest_port=%s;", src_ip, src_port, local_machine, dest_port; }'` |
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print_info -en " $src_ip:$src_port -> $local_machine:$dest_port" |
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$IPTABLES -t nat -A PREROUTING -p TCP -i $NAT_LAN_IFACE -d $src_ip \ |
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--dport $src_port -j DNAT --to $local_machine:$dest_port |
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$IPTABLES -A FORWARD -p TCP -i $NAT_LAN_IFACE -d $local_machine --dport $dest_port -j ACCEPT |
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done |
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print_info " done." |
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fi |
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if [ ! -z "$NAT_UDP_PORT_FORWARD" ]; then |
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print_info -en "\tForwarding UDP ports to local machines:" |
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for redirect in $NAT_UDP_PORT_FORWARD; do |
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#eval `echo $redirect | $AWK -v FS=: '{ printf "src_port=%s; local_machine=%s; dest_port=%s;", $1, $2, $3; }'` |
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eval `echo $redirect | \ |
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$AWK -v FS=: ' (NF == 3) { src_ip = "$lan_ip" ; src_port = $1; local_machine = $2; dest_port = $3; } \ |
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(NF == 4) { src_ip = $1 ; src_port = $2; local_machine = $3; dest_port = $4; } \ |
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END { printf "src_ip=%s; src_port=%s; local_machine=%s; dest_port=%s;", src_ip, src_port, local_machine, dest_port; }'` |
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print_info -en " $src_port -> $local_machine:$dest_port" |
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$IPTABLES -t nat -A PREROUTING -p UDP -i $NAT_LAN_IFACE -d $lan_ip \ |
|
--dport $src_port -j DNAT --to $local_machine:$dest_port |
|
$IPTABLES -A FORWARD -p UDP -i $NAT_LAN_IFACE -d $local_machine --dport $dest_port -j ACCEPT |
|
done |
|
print_info " done." |
|
fi |
|
|
|
# Keep state of connections from private subnets |
|
$IPTABLES -A OUTPUT -m conntrack --ctstate NEW -o $NAT_LAN_IFACE -j ACCEPT |
|
#$IPTABLES -A FORWARD -m conntrack --ctstate NEW -o $NAT_LAN_IFACE -j ACCEPT |
|
$IPTABLES -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT |
|
|
|
# hide NAT clients behind firewall: - set TTL |
|
# XXX: warning: this breaks traceroute !!! |
|
if [ ! "a$NAT_SET_TTL" = "ano" ]; then |
|
print_info "NAT: clients hidden behind firewall - setting TTL to $NAT_SET_TTL" |
|
$IPTABLES -t mangle -A POSTROUTING -o $NAT_LAN_IFACE -j TTL --ttl-set $NAT_SET_TTL |
fi |
fi |
} # }}} |
} # }}} |
|
|
Riadok 651 log_new_connections() |
|
Riadok 662 log_new_connections() |
|
fi |
fi |
print_info -en "Logging new connections $NAT_LOG_NEW_CONNECTIONS:" |
print_info -en "Logging new connections $NAT_LOG_NEW_CONNECTIONS:" |
for proto in $NAT_LOG_NEW_CONNECTIONS; do |
for proto in $NAT_LOG_NEW_CONNECTIONS; do |
$IPTABLES_LOG -A INPUT -m state --state NEW -p $proto -j LOG --log-prefix "IN connection: " |
$IPTABLES_LOG -A INPUT -m conntrack --ctstate NEW -p $proto -j LOG --log-prefix "IN connection: " |
$IPTABLES_LOG -A OUTPUT -m state --state NEW -p $proto -j LOG --log-prefix "OUT connection: " |
$IPTABLES_LOG -A OUTPUT -m conntrack --ctstate NEW -p $proto -j LOG --log-prefix "OUT connection: " |
$IPTABLES_LOG -A FORWARD -m state --state NEW -p $proto -j LOG --log-prefix "FWD connection: " |
$IPTABLES_LOG -A FORWARD -m conntrack --ctstate NEW -p $proto -j LOG --log-prefix "FWD connection: " |
done |
done |
print_info " done." |
print_info " done." |
fi |
fi |
Riadok 831 reject_input() |
|
Riadok 842 reject_input() |
|
if [ ! -z "$ALL_REJECT_INPUT_TCP" ]; then |
if [ ! -z "$ALL_REJECT_INPUT_TCP" ]; then |
print_info -en "Reject ALL INPUT TCP connections on ports:" |
print_info -en "Reject ALL INPUT TCP connections on ports:" |
for port in $ALL_REJECT_INPUT_TCP; do |
for port in $ALL_REJECT_INPUT_TCP; do |
|
echo $port | grep -q , |
|
multiport="$?"; |
|
if [ "$multiport" -eq 0 ]; then |
|
port_rule="--match multiport --dports $port" |
|
else |
|
port_rule="--dport $port" |
|
fi |
for riface in $REAL_INTERFACES; do |
for riface in $REAL_INTERFACES; do |
print_info -en " $port($riface)" |
print_info -en " $port($riface)" |
$IPTABLES -A INPUT -i $riface -p TCP --dport $port -j REJECT --reject-with $REJECT_WITH |
$IPTABLES -A INPUT -i $riface -p TCP $port_rule -j REJECT --reject-with $REJECT_WITH |
done |
done |
done |
done |
print_info " done." |
print_info " done." |
Riadok 841 reject_input() |
|
Riadok 859 reject_input() |
|
if [ ! -z "$ALL_REJECT_INPUT_UDP" ]; then |
if [ ! -z "$ALL_REJECT_INPUT_UDP" ]; then |
print_info -en "Reject ALL INPUT UDP connections on ports:" |
print_info -en "Reject ALL INPUT UDP connections on ports:" |
for port in $ALL_REJECT_INPUT_UDP; do |
for port in $ALL_REJECT_INPUT_UDP; do |
|
echo $port | grep -q , |
|
multiport="$?"; |
|
if [ "$multiport" -eq 0 ]; then |
|
port_rule="--match multiport --dports $port" |
|
else |
|
port_rule="--dport $port" |
|
fi |
for riface in $REAL_INTERFACES; do |
for riface in $REAL_INTERFACES; do |
print_info -en " $port($riface)" |
print_info -en " $port($riface)" |
$IPTABLES -A INPUT -i $riface -p UDP --dport $port -j REJECT --reject-with $REJECT_WITH |
$IPTABLES -A INPUT -i $riface -p UDP $port_rule -j REJECT --reject-with $REJECT_WITH |
done |
done |
done |
done |
print_info " done." |
print_info " done." |
Riadok 851 reject_input() |
|
Riadok 876 reject_input() |
|
if [ ! -z "$REAL_REJECT_INPUT_TCP" ]; then |
if [ ! -z "$REAL_REJECT_INPUT_TCP" ]; then |
print_info -en "Reject REAL all INPUT TCP connections for ALL interfaces on ports:" |
print_info -en "Reject REAL all INPUT TCP connections for ALL interfaces on ports:" |
for port in $REAL_REJECT_INPUT_TCP; do |
for port in $REAL_REJECT_INPUT_TCP; do |
|
echo $port | grep -q , |
|
multiport="$?"; |
|
if [ "$multiport" -eq 0 ]; then |
|
port_rule="--match multiport --dports $port" |
|
else |
|
port_rule="--dport $port" |
|
fi |
print_info -en " $port(ALL)" |
print_info -en " $port(ALL)" |
$IPTABLES -A INPUT -p TCP --dport $port -j REJECT --reject-with $REJECT_WITH |
$IPTABLES -A INPUT -p TCP $port_rule -j REJECT --reject-with $REJECT_WITH |
done |
done |
print_info " done." |
print_info " done." |
fi |
fi |
if [ ! -z "$REAL_REJECT_INPUT_UDP" ]; then |
if [ ! -z "$REAL_REJECT_INPUT_UDP" ]; then |
print_info -en "Reject REAL all INPUT UDP connections for ALL interfaces on ports:" |
print_info -en "Reject REAL all INPUT UDP connections for ALL interfaces on ports:" |
for port in $REAL_REJECT_INPUT_UDP; do |
for port in $REAL_REJECT_INPUT_UDP; do |
|
echo $port | grep -q , |
|
multiport="$?"; |
|
if [ "$multiport" -eq 0 ]; then |
|
port_rule="--match multiport --dports $port" |
|
else |
|
port_rule="--dport $port" |
|
fi |
for riface in $REAL_INTERFACES; do |
for riface in $REAL_INTERFACES; do |
print_info -en " $port(ALL)" |
print_info -en " $port(ALL)" |
$IPTABLES -A INPUT -p UDP --dport $port -j REJECT --reject-with $REJECT_WITH |
$IPTABLES -A INPUT -p UDP $port_rule -j REJECT --reject-with $REJECT_WITH |
done |
done |
done |
done |
print_info " done." |
print_info " done." |
Riadok 1072 allow_input() |
|
Riadok 1111 allow_input() |
|
# ACCEPT {{{ |
# ACCEPT {{{ |
if [ ! -z "$ACCEPT_INPUT_TCP" ]; then |
if [ ! -z "$ACCEPT_INPUT_TCP" ]; then |
print_info -en "$iface: Accepting INPUT TCP connections on ports:" |
print_info -en "$iface: Accepting INPUT TCP connections on ports:" |
|
counter=0; |
for port in $ACCEPT_INPUT_TCP; do |
for port in $ACCEPT_INPUT_TCP; do |
src_ip="" |
src_ip="" |
eval `echo $port | awk -v FS=: '/:/ { printf "src_ip=\"%s\"; port=\"%s\";", $1, $2; }'` |
eval `echo $port | awk -v FS=: '/:/ { printf "src_ip=\"%s\"; port=\"%s\";", $1, $2; }'` |
Riadok 1079 allow_input() |
|
Riadok 1119 allow_input() |
|
port="ALL"; |
port="ALL"; |
fi |
fi |
print_info -en " $port"`[ ! -z "$src_ip" ] && echo "[$src_ip]"` |
print_info -en " $port"`[ ! -z "$src_ip" ] && echo "[$src_ip]"` |
|
if [ $(( ++counter )) -ge 5 ]; then counter=0; print_info ""; fi; |
echo $port | grep -q , |
echo $port | grep -q , |
multiport="$?"; |
multiport="$?"; |
if [ "$multiport" -eq 0 ]; then |
if [ "$multiport" -eq 0 ]; then |
Riadok 1332 accept_related() |
|
Riadok 1373 accept_related() |
|
{ # {{{ |
{ # {{{ |
|
|
print_info -en "Accepting ESTABLISHED, RELATED packets ..." |
print_info -en "Accepting ESTABLISHED, RELATED packets ..." |
$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT |
$IPTABLES -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT |
$IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT |
$IPTABLES -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT |
print_info " done." |
print_info " done." |
|
|
} # }}} |
} # }}} |
Riadok 1421 shaping_status() |
|
Riadok 1462 shaping_status() |
|
|
|
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' `" >> $DEFAULT_FIREWALL_CONFIG_DIR/BANNED_IP.conf |
TMPFILE=`mktemp -t fw-universal.sh-XXXXXX` || exit 1 |
TMPFILE=`mktemp -t fw-universal.sh-XXXXXX` || exit 1 |
trap 'rm -f $TMPFILE' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
trap 'rm -f $TMPFILE' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
if [ -z "$*" ]; then |
if [ -z "$*" ]; then |
print_info "Reading banned IP's from STDIN:" |
#print_info "Reading banned IP's from STDIN:" |
cat >> $TMPFILE |
cat >> $TMPFILE |
else |
else |
for IP in $*; do |
for IP in $*; do |
Riadok 1434 add_banned_ip() |
|
Riadok 1475 add_banned_ip() |
|
fi |
fi |
read_config_ips $TMPFILE >> $DEFAULT_FIREWALL_CONFIG_DIR/BANNED_IP.conf |
read_config_ips $TMPFILE >> $DEFAULT_FIREWALL_CONFIG_DIR/BANNED_IP.conf |
rm -f $TMPFILE |
rm -f $TMPFILE |
|
# start with new firewalling rules |
|
$0 start |
} # }}} |
} # }}} |
|
|
deploy_block() |
deploy_block() |
Riadok 1444 deploy_block() |
|
Riadok 1487 deploy_block() |
|
fi |
fi |
print_info "Deploying to local rules ..." |
print_info "Deploying to local rules ..." |
add_banned_ip $* |
add_banned_ip $* |
# start the some script twice to refresh rules (new blocked IP's) |
# start the same script twice to refresh rules (new blocked IP's) |
QUIET=yes $0 start |
QUIET=yes $0 start |
TMPFILE=`mktemp -t fw-universal.sh-XXXXXX` || exit 1 |
TMPFILE=`mktemp -t fw-universal.sh-XXXXXX` || exit 1 |
trap 'rm -f $TMPFILE' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
trap 'rm -f $TMPFILE' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
for i in $*; do |
for i in $*; do |
echo $i >> $TMPFILE; |
echo "block $i" >> $TMPFILE; |
done |
done |
while read conn keyfile |
while read conn keyfile |
do |
do |
case "$conn" in |
case "$conn" in |
""|\#*) |
""|\#*) |
continue |
continue |
;; |
;; |
esac |
esac |
print_info "Deploying to $conn ..."; |
print_info "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=" |
cat $TMPFILE | ssh -i $keyfile $conn $0 block |
print_info "Deploying to $conn ..."; |
|
cat $TMPFILE | ssh -i $keyfile $conn $0 remote |
done < $DEFAULT_FIREWALL_CONFIG_DIR/deploy-servers.list |
done < $DEFAULT_FIREWALL_CONFIG_DIR/deploy-servers.list |
rm -f $TMPFILE |
rm -f $TMPFILE |
} # }}} |
} # }}} |
|
|
|
update_from_cvs() |
|
{ # {{{ |
|
cd /etc/firewall && cvs up -d |
|
} # }}} |
|
|
|
update() |
|
{ # {{{ |
|
$UPDATE_SCRIPT |
|
} # }}} |
|
|
|
deploy_update() |
|
{ # {{{ |
|
print_info "Updating local firewall ..." |
|
$0 update |
|
|
|
# start the same script twice to refresh rules (updated scripts and configs) |
|
QUIET=yes $0 start |
|
while read conn keyfile |
|
do |
|
case "$conn" in |
|
""|\#*) |
|
continue |
|
;; |
|
esac |
|
|
|
print_info "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=" |
|
print_info "Updating $conn ..."; |
|
echo "update" | ssh -i $keyfile $conn $0 remote |
|
done < $DEFAULT_FIREWALL_CONFIG_DIR/deploy-servers.list |
|
} # }}} |
|
|
|
remote() |
|
{ # {{{ |
|
while read comnd par |
|
do |
|
case "$comnd" in |
|
block) |
|
echo "Blocking '$par'..." |
|
add_banned_ip $par |
|
;; |
|
update) |
|
echo "Updating firewall scripts..." |
|
update |
|
;; |
|
""|\#*) |
|
echo "Line '$comnd $par' ignored" |
|
continue |
|
;; |
|
esac |
|
done |
|
} # }}} |
|
|
# Parse output from ifconfig: - tested on Linux and FreeBSD |
# Parse output from ifconfig: - tested on Linux and FreeBSD |
# http://platon.sk/cvs/cvs.php/scripts/shell/firewall/ifconfig-parse.sh |
# http://platon.sk/cvs/cvs.php/scripts/shell/firewall/ifconfig-parse.sh |
parse_ifconfig() |
parse_ifconfig() |
|
|
allow_icmp |
allow_icmp |
accept_loopback |
accept_loopback |
masquerade |
masquerade |
|
forward_on |
log_input_drop |
log_input_drop |
log_output_drop |
log_output_drop |
log_forward_drop |
log_forward_drop |
forward_on |
|
do_ip_accounting |
do_ip_accounting |
shaping_off |
shaping_off |
shaping_on |
shaping_on |
|
|
# start the some script twice to refresh rules (new blocked IP's) |
# start the some script twice to refresh rules (new blocked IP's) |
QUIET=yes $0 start; |
QUIET=yes $0 start; |
;; |
;; |
|
update) |
|
update; |
|
;; |
deploy-block) |
deploy-block) |
shift; |
shift; |
deploy_block $*; |
deploy_block $*; |
;; |
;; |
|
deploy-update) |
|
deploy_update; |
|
;; |
|
remote) |
|
remote; |
|
;; |
*) |
*) |
echo "Usage: $0 {start|stop|really-off|status|purge|block|deploy-block}" >&2 |
echo "Usage: $0 {start|stop|really-off|status|purge|block|deploy-block|deploy-update|update}" >&2 |
exit 1 |
exit 1 |
;; |
;; |
esac |
esac |