safebox/firewall_containers
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Completing firewall scripts.

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This commit is contained in:
Gyorgy Berenyi
2022-02-11 15:28:49 +00:00
parent 20ffe596b6
commit d1eb707cec
1 changed files with 58 additions and 51 deletions
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103
firewall/firewall-add
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@@ -8,7 +8,7 @@ debug() {
}
# Task type variables
NSENTER=$NSENTER
ROUTE=$ROUTE
PREROUTING=$PREROUTING
POSTROUTING=$POSTROUTING
@@ -38,31 +38,44 @@ IPTABLES=/sbin/iptables-legacy
###############################
prerouting() {
LINES=$($iptables --line-number -n | grep $COMMENT | grep PREROUTING |awk '{print $1}'| tac)
LINES=$($IPTABLES --line-number -n | grep $COMMENT | grep PREROUTING |awk '{print $1}'| tac)
# DELETE UNECESSARY LINES FROM PREVIOUS RULES
if [ -n "$LINES" ] ; then
for i in $LINES; do
$iptables -D $i
$IPTABLES -D $i
sleep 0.1
done
fi
$iptables -I PREROUTING -d $SOURCE_IP -p $PROTOCOL --dport $SOURCE_PORT -m comment --comment "$COMMENT" -j DNAT --to $TARGET_IP:$TARGET_PORT
$IPTABLES -I PREROUTING -d $SOURCE_IP -p $PROTOCOL --dport $SOURCE_PORT -m comment --comment "$COMMENT" -j DNAT --to $TARGET_IP:$TARGET_PORT
}
postrouting() {
LINES=$($iptables --line-number -n | grep $COMMENT | grep POSTROUTING | awk '{print $1}'| tac)
LINES=$($IPTABLES --line-number -n | grep $COMMENT | grep POSTROUTING | awk '{print $1}'| tac)
# DELETE UNECESSARY LINES FROM PREVIOUS RULES
if [ -n "$LINES" ] ; then
for i in $LINES; do
$iptables -D $i
$IPTABLES -D $i
sleep 0.1
done
fi
$iptables -I POSTROUTING -d $TARGET_IP -p $PROTOCOL --dport $TARGET_PORT -m comment --comment "$COMMENT" -j MASQUERADE
$IPTABLES -I POSTROUTING -d $TARGET_IP -p $PROTOCOL --dport $TARGET_PORT -m comment --comment "$COMMENT" -j MASQUERADE
}
ip_route() {
COUNT_NETWORK=$(set |grep NETWORK |wc -l)
for network_index in $(seq 1 $COUNT_NETWORK) ; do
if set |grep NETWORK_ ; then
NETWORK=$(eval "echo \${"NETWORK_$network_index"}")
GATEWAY=$(eval "echo \${"GATEWAY_$network_index"}")
fi
$IP_ROUTE add $NETWORK/24 via $GATEWAY
done
}
COUNT_SOURCE_IP=$(set |grep SOURCE_IP |wc -l)
@@ -92,57 +105,45 @@ for source_ip_index in $(seq 1 $COUNT_SOURCE_IP) ; do
#############################
# NSENTER Specific settings #
if [[ "$NSENTER" == "true" ]] ; then
if [[ "$PREROUTING" == "true" ]] || [[ "$POSTROUTING" == "true" ]] ; then
iptables="nsenter -t $(docker inspect --format {{.State.Pid}} $NAME) -n -- $IPTABLES -t nat";
if [[ "$PREROUTING" == "true" ]] || [[ "$POSTROUTING" == "true" ]] ; then
NS_IPTABLES="nsenter -t $(docker inspect --format {{.State.Pid}} $NAME) -n -- $IPTABLES -t nat";
debug "iptables: "$IPTABLES;
debug "iptables: "$NS_IPTABLES;
if [[ "$PREROUTING" == "true" ]] ; then
prerouting;
if [[ "$PREROUTING" == "true" ]] ; then
prerouting;
elif [[ "$POSTROUTING" == "true" ]] ; then
postrouting;
fi;
else
ip_route="nsenter -t $(docker inspect --format {{.State.Pid}} $NAME) -n -- ip route";
fi
elif [[ "$POSTROUTING" == "true" ]] ; then
postrouting;
fi;
else
if [[ "$PREROUTING" == "true" ]] || [[ "$POSTROUTING" == "true" ]] ; then
if [[ "$PREROUTING" == "true" ]] ; then
prerouting;
elif [[ "$POSTROUTING" == "true" ]] ; then
postrouting;
fi;
############################
# Host firewall settings ###
if $IPTABLES --list $CHAIN |grep ESTABLISHED |grep RELATED|grep ACCEPT ; then
echo "nothing to do";
else
if $IPTABLES --list $CHAIN |grep ESTABLISHED |grep RELATED|grep ACCEPT ; then
echo "nothing to do";
else
$IPTABLES -I $CHAIN -m state --state established,related -j ACCEPT;
fi
#
# DELETE UNECESSARY LINES FROM PREVIOUS RULES
LINES=$($IPTABLES --line-number -n --list $CHAIN | grep $SOURCE_IP |grep $TARGET_IP |grep $PROTOCOL |grep $TARGET_PORT | awk '{print $1}'| tac)
if [ -n "$LINES" ] ; then
for i in $LINES; do
$IPTABLES -D $CHAIN $i
sleep 0.1
done
fi
$IPTABLES -I $CHAIN -s $SOURCE_IP -d $TARGET_IP -p $PROTOCOL --dport $TARGET_PORT -m comment --comment "$COMMENT" -j ACCEPT
#############################
$IPTABLES -I $CHAIN -m state --state established,related -j ACCEPT;
fi
#
# DELETE UNECESSARY LINES FROM PREVIOUS RULES
LINES=$($IPTABLES --line-number -n --list $CHAIN | grep $SOURCE_IP |grep $TARGET_IP |grep $PROTOCOL |grep $TARGET_PORT | awk '{print $1}'| tac)
if [ -n "$LINES" ] ; then
for i in $LINES; do
$IPTABLES -D $CHAIN $i
sleep 0.1
done
fi
$IPTABLES -I $CHAIN -s $SOURCE_IP -d $TARGET_IP -p $PROTOCOL --dport $TARGET_PORT -m comment --comment "$COMMENT" -j ACCEPT
#############################
fi
done # target_port
@@ -151,3 +152,9 @@ fi
done # source_ip
if [[ "$ROUTE" == "true" ]] ; then
IP_ROUTE="nsenter -t $(docker inspect --format {{.State.Pid}} $NAME) -n -- ip route";
debug "ip_route: "$IP_ROUTE;
ip_route;
fi