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firewall: Rewrite policy script.

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Restructure the code; add fallback options if no configuration
is set; reliably check if BLUE or ORANGE are used.
This commit is contained in:
Michael Tremer
2013-09-02 21:51:22 +02:00
parent 3ad23ee1d9
commit 52c5ec837f
1 changed files with 88 additions and 55 deletions
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143
config/forwardfw/firewall-policy
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@@ -1,5 +1,4 @@
#!/bin/sh
###############################################################################
# #
# IPFire.org - A linux based firewall #
@@ -20,72 +19,106 @@
# #
###############################################################################
eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
eval $(/usr/local/bin/readhash /var/ipfire/forward/settings)
eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
iptables -F POLICYFWD
iptables -F POLICYOUT
iptables -F POLICYIN
if [ -f "/var/ipfire/red/iface" ]; then
IFACE=`cat /var/ipfire/red/iface`
IFACE="$(</var/ipfire/red/iface)"
fi
#FORWARDFW
if [ "$POLICY" == "MODE1" ]; then
if [ "$FWPOLICY" == "REJECT" ]; then
if [ "$DROPFORWARD" == "on" ]; then
/sbin/iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "REJECT_FORWARD"
fi
/sbin/iptables -A POLICYFWD -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_FORWARD"
fi
if [ "$FWPOLICY" == "DROP" ]; then
if [ "$DROPFORWARD" == "on" ]; then
/sbin/iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
fi
/sbin/iptables -A POLICYFWD -j DROP -m comment --comment "DROP_FORWARD"
fi
else
if [ "$BLUE_DEV" ] && [ "$IFACE" ]; then
/sbin/iptables -A POLICYFWD -i blue0 ! -o $IFACE -j DROP
fi
/sbin/iptables -A POLICYFWD -i orange0 ! -o $IFACE -j DROP
/sbin/iptables -A POLICYFWD -j ACCEPT
/sbin/iptables -A POLICYFWD -m comment --comment "DROP_FORWARD" -j DROP
fi
# Figure out what devices are configured.
HAVE_BLUE="false"
HAVE_ORANGE="false"
#OUTGOINGFW
if [ "$POLICY1" == "MODE1" ]; then
if [ "$FWPOLICY1" == "REJECT" ]; then
if [ "$DROPOUTGOING" == "on" ]; then
/sbin/iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "REJECT_OUTPUT"
case "${CONFIG_TYPE}" in
2)
HAVE_BLUE="true"
;;
3)
HAVE_ORANGE="true"
;;
4)
HAVE_BLUE="true"
HAVE_ORANGE="true"
;;
esac
# INPUT
case "${FWPOLICY2}" in
REJECT)
if [ "${DROPINPUT}" = "on" ]; then
/sbin/iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "REJECT_INPUT"
fi
/sbin/iptables -A POLICYOUT -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_OUTPUT"
fi
if [ "$FWPOLICY1" == "DROP" ]; then
if [ "$DROPOUTGOING" == "on" ]; then
/sbin/iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT"
/sbin/iptables -A POLICYIN -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_INPUT"
;;
*) # DROP
if [ "${DROPINPUT}" = "on" ]; then
/sbin/iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
fi
/sbin/iptables -A POLICYOUT -j DROP -m comment --comment "DROP_OUTPUT"
fi
else
/sbin/iptables -A POLICYOUT -j ACCEPT
/sbin/iptables -A POLICYOUT -m comment --comment "DROP_OUTPUT" -j DROP
fi
#INPUT
if [ "$FWPOLICY2" == "REJECT" ]; then
if [ "$DROPINPUT" == "on" ]; then
/sbin/iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "REJECT_INPUT"
fi
/sbin/iptables -A POLICYIN -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_INPUT"
fi
if [ "$FWPOLICY2" == "DROP" ]; then
if [ "$DROPINPUT" == "on" ]; then
/sbin/iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
fi
/sbin/iptables -A POLICYIN -j DROP -m comment --comment "DROP_INPUT"
fi
/sbin/iptables -A POLICYIN -j DROP -m comment --comment "DROP_INPUT"
;;
esac
# FORWARD
case "${POLICY}" in
MODE1)
case "${FWPOLICY}" in
REJECT)
if [ "${DROPFORWARD}" = "on" ]; then
/sbin/iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "REJECT_FORWARD"
fi
/sbin/iptables -A POLICYFWD -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_FORWARD"
;;
*) # DROP
if [ "${DROPFORWARD}" = "on" ]; then
/sbin/iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
fi
/sbin/iptables -A POLICYFWD -j DROP -m comment --comment "DROP_FORWARD"
;;
esac
;;
*)
if [ -n "${IFACE}" ]; then
if [ "${HAVE_BLUE}" = "true" ] && [ -n "${BLUE_DEV}" ]; then
/sbin/iptables -A POLICYFWD -i "${BLUE_DEV}" ! -o "${IFACE}" -j DROP
fi
if [ "${HAVE_ORANGE}" = "true" ] && [ -n "${ORANGE_DEV}" ]; then
/sbin/iptables -A POLICYFWD -i "${ORANGE_DEV}" ! -o "${IFACE}" -j DROP
fi
fi
/sbin/iptables -A POLICYFWD -j ACCEPT
/sbin/iptables -A POLICYFWD -m comment --comment "DROP_FORWARD" -j DROP
;;
esac
# OUTGOING
case "${POLICY1}" in
MODE1)
case "${FWPOLICY1}" in
REJECT)
if [ "${DROPOUTGOING}" = "on" ]; then
/sbin/iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "REJECT_OUTPUT"
fi
/sbin/iptables -A POLICYOUT -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_OUTPUT"
;;
*) # DROP
if [ "${DROPOUTGOING}" == "on" ]; then
/sbin/iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT"
fi
/sbin/iptables -A POLICYOUT -j DROP -m comment --comment "DROP_OUTPUT"
;;
esac
;;
*)
/sbin/iptables -A POLICYOUT -j ACCEPT
/sbin/iptables -A POLICYOUT -m comment --comment "DROP_OUTPUT" -j DROP
;;
esac
exit 0