mirror of
https://gitlab.com/shorewall/code.git
synced 2024-11-08 00:34:04 +01:00
74c19e8a44
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3989 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
373 lines
10 KiB
Bash
Executable File
373 lines
10 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# Shorewall Lite Packet Filtering Firewall Capabilities Detector
|
|
#
|
|
# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
|
|
#
|
|
# (c) 2006 - Tom Eastep (teastep@shorewall.net)
|
|
#
|
|
# This file should be placed in /sbin/shorewall.
|
|
#
|
|
# Shorewall documentation is available at http://shorewall.sourceforge.net
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of Version 2 of the GNU General Public License
|
|
# as published by the Free Software Foundation.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
|
|
#
|
|
#
|
|
# This program may be used to create a /etc/shorewall/capabilities file for
|
|
# use in compiling Shorewall firewalls on another system.
|
|
#
|
|
# On the target system (the system where the firewall program is to run):
|
|
#
|
|
# [ IPTABLES=<iptables binary> ] [ MODULESDIR=<kernel modules directory> ] shorecap > capabilities
|
|
#
|
|
# Now move the capabilities file to the compilation system. The file must
|
|
# be placed in a directory on the CONFIG_PATH to be used when compiling firewalls
|
|
# for the target system.
|
|
#
|
|
# Default values for the two variables are:
|
|
#
|
|
# IPTABLES - iptables
|
|
# MODULESDIR - /lib/modules/$(uname -r)/kernel/net/ipv4/netfilter
|
|
#
|
|
# Shorewall need not be installed on the target system to run shorecap. If the '-e' flag is
|
|
# used during firewall compilation, then the generated firewall program will likewise not
|
|
# require Shorewall to be installed.
|
|
|
|
VERSION=3.2.0-RC1
|
|
|
|
#
|
|
# Suppress all output for a command
|
|
#
|
|
qt()
|
|
{
|
|
"$@" >/dev/null 2>&1
|
|
}
|
|
|
|
#
|
|
# Split a colon-separated list into a space-separated list
|
|
#
|
|
split() {
|
|
local ifs=$IFS
|
|
IFS=:
|
|
set -- $1
|
|
echo $*
|
|
IFS=$ifs
|
|
}
|
|
|
|
#
|
|
# Internal version of 'which'
|
|
#
|
|
mywhich() {
|
|
local dir
|
|
|
|
for dir in $(split $PATH); do
|
|
if [ -x $dir/$1 ]; then
|
|
echo $dir/$1
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
return 2
|
|
}
|
|
|
|
#
|
|
# Load a Kernel Module
|
|
#
|
|
loadmodule() # $1 = module name, $2 - * arguments
|
|
{
|
|
local modulename=$1
|
|
local modulefile
|
|
local suffix
|
|
moduleloader=modprobe
|
|
|
|
if ! qt mywhich modprobe; then
|
|
moduleloader=insmod
|
|
fi
|
|
|
|
if [ -z "$(lsmod | grep $modulename)" ]; then
|
|
shift
|
|
|
|
for suffix in $MODULE_SUFFIX ; do
|
|
modulefile=$MODULESDIR/${modulename}.${suffix}
|
|
|
|
if [ -f $modulefile ]; then
|
|
case $moduleloader in
|
|
insmod)
|
|
insmod $modulefile $*
|
|
;;
|
|
*)
|
|
modprobe $modulename $*
|
|
;;
|
|
esac
|
|
|
|
return
|
|
fi
|
|
done
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Load kernel modules required for Shorewall
|
|
#
|
|
load_kernel_modules()
|
|
{
|
|
[ -z "$MODULESDIR" ] && \
|
|
MODULESDIR=/lib/modules/$(uname -r)/kernel/net/ipv4/netfilter
|
|
|
|
#
|
|
# Essential Modules
|
|
#
|
|
loadmodule nfnetlink
|
|
loadmodule x_tables
|
|
loadmodule ip_tables
|
|
loadmodule iptable_filter
|
|
loadmodule iptable_mangle
|
|
loadmodule ip_conntrack
|
|
loadmodule iptable_nat
|
|
loadmodule xt_state
|
|
loadmodule xt_tcpudp
|
|
#
|
|
# Other xtables modules
|
|
#
|
|
loadmodule xt_CLASSIFY
|
|
loadmodule xt_connmark
|
|
loadmodule xt_CONNMARK
|
|
loadmodule xt_conntrack
|
|
loadmodule xt_dccp
|
|
loadmodule xt_helper
|
|
loadmodule xt_length
|
|
loadmodule xt_limit
|
|
loadmodule xt_mac
|
|
loadmodule xt_mark
|
|
loadmodule xt_MARK
|
|
loadmodule xt_NFQUEUE
|
|
loadmodule xt_physdev
|
|
loadmodule xt_pkttype
|
|
loadmodule xt_tcpmss
|
|
#
|
|
# Helpers
|
|
#
|
|
loadmodule ip_conntrack_ftp
|
|
loadmodule ip_conntrack_tftp
|
|
loadmodule ip_conntrack_irc
|
|
loadmodule iptable_nat
|
|
loadmodule ip_nat_ftp
|
|
loadmodule ip_nat_tftp
|
|
loadmodule ip_nat_irc
|
|
loadmodule ip_set
|
|
loadmodule ip_set_iphash
|
|
loadmodule ip_set_ipmap
|
|
loadmodule ip_set_macipmap
|
|
loadmodule ip_set_portmap
|
|
#
|
|
# Traffic Shaping
|
|
#
|
|
loadmodule sch_sfq
|
|
loadmodule sch_ingress
|
|
loadmodule sch_htb
|
|
loadmodule cls_u32
|
|
#
|
|
# Extensions
|
|
#
|
|
loadmodule ipt_addrtype
|
|
loadmodule ipt_ah
|
|
loadmodule ipt_CLASSIFY
|
|
loadmodule ipt_CLUSTERIP
|
|
loadmodule ipt_comment
|
|
loadmodule ipt_connmark
|
|
loadmodule ipt_CONNMARK
|
|
loadmodule ipt_conntrack
|
|
loadmodule ipt_dscp
|
|
loadmodule ipt_DSCP
|
|
loadmodule ipt_ecn
|
|
loadmodule ipt_ECN
|
|
loadmodule ipt_esp
|
|
loadmodule ipt_hashlimit
|
|
loadmodule ipt_helper
|
|
loadmodule ipt_ipp2p
|
|
loadmodule ipt_iprange
|
|
loadmodule ipt_length
|
|
loadmodule ipt_limit
|
|
loadmodule ipt_LOG
|
|
loadmodule ipt_mac
|
|
loadmodule ipt_mark
|
|
loadmodule ipt_MARK
|
|
loadmodule ipt_MASQUERADE
|
|
loadmodule ipt_multiport
|
|
loadmodule ipt_NETMAP
|
|
loadmodule ipt_NOTRACK
|
|
loadmodule ipt_owner
|
|
loadmodule ipt_physdev
|
|
loadmodule ipt_pkttype
|
|
loadmodule ipt_policy
|
|
loadmodule ipt_realm
|
|
loadmodule ipt_recent
|
|
loadmodule ipt_REDIRECT
|
|
loadmodule ipt_REJECT
|
|
loadmodule ipt_SAME
|
|
loadmodule ipt_sctp
|
|
loadmodule ipt_set
|
|
loadmodule ipt_state
|
|
loadmodule ipt_tcpmss
|
|
loadmodule ipt_TCPMSS
|
|
loadmodule ipt_tos
|
|
loadmodule ipt_TOS
|
|
loadmodule ipt_ttl
|
|
loadmodule ipt_TTL
|
|
loadmodule ipt_ULOG
|
|
|
|
}
|
|
|
|
#
|
|
# Determine which optional facilities are supported by iptables/netfilter
|
|
#
|
|
determine_capabilities() {
|
|
[ -z "$IPTABLES" ] && IPTABLES=$(mywhich iptables)
|
|
|
|
[ -z "$IPTABLES" ] && { echo "ERROR: Can't find IPTABLES executable" ; exit 2; }
|
|
|
|
qt $IPTABLES -t nat -L -n && NAT_ENABLED=Yes || NAT_ENABLED=
|
|
qt $IPTABLES -t mangle -L -n && MANGLE_ENABLED=Yes || MANGLE_ENABLED=
|
|
|
|
CONNTRACK_MATCH=
|
|
MULTIPORT=
|
|
XMULTIPORT=
|
|
POLICY_MATCH=
|
|
PHYSDEV_MATCH=
|
|
IPRANGE_MATCH=
|
|
RECENT_MATCH=
|
|
OWNER_MATCH=
|
|
IPSET_MATCH=
|
|
CONNMARK=
|
|
CONNMARK_MATCH=
|
|
RAW_TABLE=
|
|
IPP2P_MATCH=
|
|
LENGTH_MATCH=
|
|
CLASSIFY_TARGET=
|
|
ENHANCED_REJECT=
|
|
USEPKTTYPE=
|
|
KLUDGEFREE=
|
|
MARK=
|
|
XMARK=
|
|
MANGLE_FORWARD=
|
|
|
|
qt $IPTABLES -N fooX1234
|
|
qt $IPTABLES -A fooX1234 -m conntrack --ctorigdst 192.168.1.1 -j ACCEPT && CONNTRACK_MATCH=Yes
|
|
qt $IPTABLES -A fooX1234 -p tcp -m multiport --dports 21,22 -j ACCEPT && MULTIPORT=Yes
|
|
qt $IPTABLES -A fooX1234 -p tcp -m multiport --dports 21:22 -j ACCEPT && XMULTIPORT=Yes
|
|
qt $IPTABLES -A fooX1234 -m policy --pol ipsec --mode tunnel --dir in -j ACCEPT && POLICY_MATCH=Yes
|
|
|
|
if qt $IPTABLES -A fooX1234 -m physdev --physdev-in eth0 -j ACCEPT; then
|
|
PHYSDEV_MATCH=Yes
|
|
qt $IPTABLES -A fooX1234 -m physdev --physdev-in eth1 -m physdev --physdev-out eth1 -j ACCEPT && KLUDGEFREE=Yes
|
|
fi
|
|
|
|
if qt $IPTABLES -A fooX1234 -m iprange --src-range 192.168.1.5-192.168.1.124 -j ACCEPT; then
|
|
IPRANGE_MATCH=Yes
|
|
if [ -z "${KLUDGEFREE}${PHYSDEV_MATCH}" ]; then
|
|
qt $IPTABLES -A fooX1234 -m iprange --src-range 192.168.1.5-192.168.1.124 -m iprange --dst-range 192.168.1.5-192.168.1.124 -j ACCEPT && KLUDGEFREE=Yes
|
|
fi
|
|
fi
|
|
|
|
qt $IPTABLES -A fooX1234 -m recent --update -j ACCEPT && RECENT_MATCH=Yes
|
|
qt $IPTABLES -A fooX1234 -m owner --uid-owner 0 -j ACCEPT && OWNER_MATCH=Yes
|
|
|
|
if qt $IPTABLES -A fooX1234 -m connmark --mark 2 -j ACCEPT; then
|
|
CONNMARK_MATCH=Yes
|
|
qt $IPTABLES -A fooX1234 -m connmark --mark 2/0xFF -j ACCEPT && XCONNMARK_MATCH=Yes
|
|
fi
|
|
|
|
qt $IPTABLES -A fooX1234 -p tcp -m ipp2p --ipp2p -j ACCEPT && IPP2P_MATCH=Yes
|
|
qt $IPTABLES -A fooX1234 -m length --length 10:20 -j ACCEPT && LENGTH_MATCH=Yes
|
|
qt $IPTABLES -A fooX1234 -j REJECT --reject-with icmp-host-prohibited && ENHANCED_REJECT=Yes
|
|
|
|
if [ -n "$MANGLE_ENABLED" ]; then
|
|
qt $IPTABLES -t mangle -N fooX1234
|
|
|
|
if qt $IPTABLES -t mangle -A fooX1234 -j MARK --set-mark 1; then
|
|
MARK=Yes
|
|
qt $IPTABLES -t mangle -A fooX1234 -j MARK --and-mark 0xFF && XMARK=Yes
|
|
fi
|
|
|
|
if qt $IPTABLES -t mangle -A fooX1234 -j CONNMARK --save-mark; then
|
|
CONNMARK=Yes
|
|
qt $IPTABLES -t mangle -A fooX1234 -j CONNMARK --save-mark --mask 0xFF && XCONNMARK=Yes
|
|
fi
|
|
|
|
qt $IPTABLES -t mangle -A fooX1234 -j CLASSIFY --set-class 1:1 && CLASSIFY_TARGET=Yes
|
|
qt $IPTABLES -t mangle -F fooX1234
|
|
qt $IPTABLES -t mangle -X fooX1234
|
|
qt $IPTABLES -t mangle -L FORWARD -n && MANGLE_FORWARD=Yes
|
|
fi
|
|
|
|
qt $IPTABLES -t raw -L -n && RAW_TABLE=Yes
|
|
|
|
if qt mywhich ipset; then
|
|
qt ipset -X fooX1234 # Just in case something went wrong the last time
|
|
|
|
if qt ipset -N fooX1234 iphash ; then
|
|
if qt $IPTABLES -A fooX1234 -m set --set fooX1234 src -j ACCEPT; then
|
|
qt $IPTABLES -D fooX1234 -m set --set fooX1234 src -j ACCEPT
|
|
IPSET_MATCH=Yes
|
|
fi
|
|
qt ipset -X fooX1234
|
|
fi
|
|
fi
|
|
|
|
qt $IPTABLES -A fooX1234 -m pkttype --pkt-type broadcast -j ACCEPT && USEPKTTYPE=Yes
|
|
|
|
qt $IPTABLES -F fooX1234
|
|
qt $IPTABLES -X fooX1234
|
|
}
|
|
|
|
report_capability() # $1 = Capability
|
|
{
|
|
eval echo $1=\$$1
|
|
}
|
|
|
|
report_capabilities() {
|
|
echo "#"
|
|
echo "# Shorewall $VERSION detected the following iptables/netfilter capabilities - $(date)"
|
|
echo "#"
|
|
report_capability NAT_ENABLED
|
|
report_capability MANGLE_ENABLED
|
|
report_capability MULTIPORT
|
|
report_capability XMULTIPORT
|
|
report_capability CONNTRACK_MATCH
|
|
report_capability USEPKTTYPE
|
|
report_capability POLICY_MATCH
|
|
report_capability PHYSDEV_MATCH
|
|
report_capability LENGTH_MATCH
|
|
report_capability IPRANGE_MATCH
|
|
report_capability RECENT_MATCH
|
|
report_capability OWNER_MATCH
|
|
report_capability IPSET_MATCH
|
|
report_capability CONNMARK
|
|
report_capability XCONNMARK
|
|
report_capability CONNMARK_MATCH
|
|
report_capability XCONNMARK_MATCH
|
|
report_capability RAW_TABLE
|
|
report_capability IPP2P_MATCH
|
|
report_capability CLASSIFY_TARGET
|
|
report_capability ENHANCED_REJECT
|
|
report_capability KLUDGEFREE
|
|
report_capability MARK
|
|
report_capability XMARK
|
|
report_capability MANGLE_FORWARD
|
|
}
|
|
|
|
load_kernel_modules
|
|
determine_capabilities
|
|
report_capabilities
|