safebox/firewall_containers
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validating application names or IP addresses variables

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This commit is contained in:
Gyorgy Berenyi
2022-09-12 12:51:43 +00:00
parent 91434028d9
commit a326c2646b
1 changed files with 86 additions and 44 deletions
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130
firewall/firewall-add
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@@ -22,7 +22,10 @@ PROTOCOL=$TYPE
EXTRA_OPTIONS="$2 $3 $4"
# turn on debug mode by extra option "debug"
set | grep SOURCE
set | grep TARGET
# turn on debug mode by extra option "debug"
if [[ "$(echo "$EXTRA_OPTIONS" | grep debug)" != "" ]] ; then
DEBUG=1
fi;
@@ -63,55 +66,76 @@ if [[ -z "$TYPE" ]]; then
TYPE="tcp"
fi;
if [[ -z "$SOURCE_IP" ]]; then
if [[ -z "$SOURCE" ]]; then
SOURCE_IP="0.0.0.0/0";
elif [[ "$(echo $SOURCE_IP | cut -d . -f4)" == "0" ]] ; then
SOURCE_IP="$SOURCE_IP/24";
debug "source ip is $SOURCE_IP";
else
IDX=0
for i in $(echo $SOURCE) ; do
if [[ "$i" != *"."* ]]; then
name_resolver $i;
debug "source ip is $APP_IP";
for IP in $(echo $APP_IP); do
IDX=$(expr 1 + $IDX)
eval SOURCE_IP_$IDX=$IP;
done;
else
IDX=$(expr 1 + $IDX)
if [[ "$(echo $i | cut -d . -f4)" == "0" ]] ; then
SOURCE_IP="$SOURCE_IP/24";
eval SOURCE_IP_$IDX="$SOURCE_IP/24";
debug "source ip is $SOURCE_IP";
else
eval SOURCE_IP_$IDX=$i;
IP=$i
debug "source ip is $IP";
fi
fi
done
if [ $IDX = 1 ]; then
SOURCE_IP=$IP
fi;
fi
if [[ "$SOURCE_APP" != *"."* ]]; then
name_resolver $SOURCE_APP;
debug "source ip is $APP_IP";
IDX=0
for IP in $(echo $APP_IP); do
IDX=$(expr 1 + $IDX)
if [ $IDX = 1 ]; then
SOURCE_IP=$IP
else
eval SOURCE_IP_$IDX=$IP;
fi;
done;
# Modifying source or target IP addresses if POSTROUTING rules needed to applied
fi;
if [[ -z "$TARGET_IP" ]]; then
if [[ -z "$TARGET" ]]; then
TARGET_IP="0.0.0.0/0";
elif [[ "$(echo $TARGET_IP | cut -d . -f4)" == "0" ]] ; then
TARGET_IP="$TARGET_IP/24";
debug "target ip is $TARGET_IP";
else
IDX=0
for i in $(echo $TARGET) ; do
if [[ "$i" != *"."* ]]; then
name_resolver $i;
debug "target ip is $APP_IP";
for IP in $(echo $APP_IP); do
IDX=$(expr 1 + $IDX)
eval TARGET_IP_$IDX=$IP;
done;
else
IDX=$(expr 1 + $IDX)
if [[ "$(echo $i | cut -d . -f4)" == "0" ]] ; then
TARGET_IP="$TARGET_IP/24";
eval TARGET_IP_$IDX="$TARGET_IP/24";
debug "target ip is $TARGET_IP";
else
eval TARGET_IP_$IDX=$i;
IP=$i
debug "target ip is $IP";
fi
fi
done
if [ $IDX = 1 ]; then
TARGET_IP=$IP
fi;
fi
if [[ "$TARGET_APP" != *"."* ]]; then
name_resolver $TARGET_APP;
debug "target ip is $APP_IP";
IDX=0
for IP in $(echo $APP_IP); do
IDX=$(expr 1 + $IDX)
if [ $IDX = 1 ]; then
TARGET_IP=$IP;
else
eval TARGET_IP_$IDX=$IP;
fi;
done;
fi;
set | grep SOURCE
set | grep TARGET
prerouting() {
LINES=$($IPTABLES -L --line-number -n | grep DNAT | grep $SOURCE_PORT |grep $TARGET_IP |grep $TARGET_PORT |grep $COMMENT | awk '{print $1}'| tac)
@@ -281,8 +305,26 @@ else
done
fi
debug "$IPTABLES -I $CHAIN -p $PROTOCOL -s $SOURCE_IP --sport $SOURCE_PORT -d $TARGET_IP --dport $TARGET_PORT -m comment --comment "$COMMENT" -j ACCEPT"
$IPTABLES -I $CHAIN -p $PROTOCOL -s $SOURCE_IP -d $TARGET_IP --dport $TARGET_PORT -m comment --comment "$COMMENT" -j ACCEPT
IPTABLES_OPTIONS=""
if [ "$SOURCE_IP" != "" ]; then
IPTABLES_OPTIONS=$IPTABLES_OPTIONS" -s $SOURCE_IP";
else
SOURCE_PORT=""
fi
if [ "$SOURCE_PORT" != "" ]; then
IPTABLES_OPTIONS=$IPTABLES_OPTIONS" --sport $SOURCE_PORT";
fi
if [ "$TARGET_IP" != "" ]; then
IPTABLES_OPTIONS=$IPTABLES_OPTIONS" -d $TARGET_IP";
else
TARGET_PORT=""
fi
if [ "$TARGET_PORT" != "" ]; then
IPTABLES_OPTIONS=$IPTABLES_OPTIONS" --dport $TARGET_PORT";
fi
debug "$IPTABLES -I $CHAIN -p $PROTOCOL $IPTABLES_OPTIONS -m comment --comment "$COMMENT" -j ACCEPT"
$IPTABLES -I $CHAIN -p $PROTOCOL $IPTABLES_OPTIONS -m comment --comment "$COMMENT" -j ACCEPT
#############################
fi