version 2.12, 2005/01/16 10:55:39 |
version 2.15, 2005/01/16 12:13:32 |
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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 2.11 2005/01/13 13:31:54 rajo Exp $ |
# $Platon: scripts/shell/firewall/fw-universal.sh,v 2.14 2005/01/16 11:06:46 rajo Exp $ |
# |
# |
# Changelog: |
# Changelog: |
# 2003-10-24 - created |
# 2003-10-24 - created |
Line 37 LOG_LIMIT="${LOG_LIMIT:=-m limit --limit |
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Line 37 LOG_LIMIT="${LOG_LIMIT:=-m limit --limit |
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# Paths: |
# Paths: |
#IPTABLES=":" # for testing only - does nothing |
#IPTABLES=":" # for testing only - does nothing |
IPTABLES="${IPTABLES:=/sbin/iptables}" |
IPTABLES="${IPTABLES:=$DEBUG/sbin/iptables}" |
IFCONFIG="${IFCONFIG:=/sbin/ifconfig}" |
IFCONFIG="${IFCONFIG:=/sbin/ifconfig}" |
DEPMOD="${DEPMOD:=/sbin/depmod}" |
DEPMOD="${DEPMOD:=/sbin/depmod}" |
MODPROBE="${MODPROBE:=/sbin/modprobe}" |
MODPROBE="${MODPROBE:=/sbin/modprobe}" |
Line 48 AWK="${AWK:=/usr/bin/awk}" |
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Line 48 AWK="${AWK:=/usr/bin/awk}" |
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LO_IFACE="${LO_IFACE:=lo}" |
LO_IFACE="${LO_IFACE:=lo}" |
LO_IP="IP_$LO_IFACE" |
LO_IP="IP_$LO_IFACE" |
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# Which ports will be allowed on INPUT (TCP connections) |
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ALL_ACCEPT_INPUT_TCP="${ALL_ACCEPT_INPUT_TCP:=}" |
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# interface eth0 |
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eth0_ACCEPT_INPUT_TCP="${eth0_ACCEPT_INPUT_TCP:=}" |
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# interface ppp0 |
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ppp0_ACCEPT_INPUT_TCP="${ppp0_ACCEPT_INPUT_TCP:=}" |
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# Which ports will be allowed on INPUT (UDP connections) |
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# interface eth0 |
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eth0_ACCEPT_INPUT_UDP="${eth0_ACCEPT_INPUT_UDP:=}" |
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# interface ppp0 |
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ppp0_ACCEPT_INPUT_UDP="${ppp0_ACCEPT_INPUT_UDP:=}" |
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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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} # }}} |
} # }}} |
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# all packets on loopback are accpted |
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set_loopback() |
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{ # {{{ |
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$IPTABLES -A INPUT -j ACCEPT -i $LO_IFACE |
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$IPTABLES -A OUTPUT -j ACCEPT -o $LO_IFACE |
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} # }}} |
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# DROP packages from nmap(1) |
# DROP packages from nmap(1) |
nmap_scan_filter() |
nmap_scan_filter() |
{ # {{{ |
{ # {{{ |
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} # }}} |
} # }}} |
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allow_input() |
allow_accept_all() |
{ # {{{ |
{ # {{{ |
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if [ ! -z "$IFACE_ACCEPT_ALL" ]; then |
if [ ! -z "$IFACE_ACCEPT_ALL" ]; then |
echo -en "Accepting ALL packets on interfaces:" |
echo -en "Accepting ALL packets on interfaces:" |
for iface in $IFACE_ACCEPT_ALL; do |
for iface in $IFACE_ACCEPT_ALL; do |
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done |
done |
echo " done." |
echo " done." |
fi |
fi |
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} # }}} |
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allow_input() |
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{ # {{{ |
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if [ ! -z "$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:" |
Line 594 parse_ifconfig() |
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Line 577 parse_ifconfig() |
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parse_ifconfig |
parse_ifconfig |
print_iface_status |
print_iface_status |
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# $interfaces - all interfaces |
# |
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# Split interfaces into 2 groups: |
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# |
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# $INTERFACES_ACCEPT_ALL - interfaces withouth restrictions |
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# |
# $INTERFACES - all interfaces withouth loopback |
# $INTERFACES - all interfaces withouth loopback |
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# and devices without restrictions (e.g. tun0 tun1 tap0 ...) |
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# |
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# list of all interfaces is in $interfaces variable |
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# |
INTERFACES="" |
INTERFACES="" |
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INTERFACES_ACCEPT_ALL="" |
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regexp='^\('`echo $IFACE_ACCEPT_ALL | sed 's/ /\\\|/g; s/+/.*/g;'`'\)$' |
for iface in $interfaces; do |
for iface in $interfaces; do |
if [ "o$iface" = "olo" ]; then continue; fi |
#if [ "o$iface" = "olo" ]; then continue; fi |
INTERFACES="$INTERFACES $iface"; |
echo $iface | grep -q -e "$regexp" |
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if [ $? = 0 ] || [ "o$iface" = "olo" ]; then # lo interface is always here |
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INTERFACES_ACCEPT_ALL="$INTERFACES_ACCEPT_ALL $iface"; |
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else |
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INTERFACES="$INTERFACES $iface"; |
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fi |
done |
done |
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# |
# |
# (un)commnet next lines as needed |
# (un)commnet next lines as needed |
# |
# |
set_loopback |
allow_accept_all |
nmap_scan_filter |
nmap_scan_filter |
invalid_packet_filter |
invalid_packet_filter |
anti_spoof_filter |
anti_spoof_filter |