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Inserting source postrouting rules

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This commit is contained in:
Gyorgy Berenyi
2022-03-12 15:10:12 +00:00
parent 853d1e6d75
commit 47eea279ec
1 changed files with 28 additions and 11 deletions
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21
firewall/firewall-add
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@@ -76,7 +76,9 @@ prerouting() {
}
postrouting() {
LINES=$($IPTABLES -L --line-number -n | grep $COMMENT | grep $TARGET_IP | grep $TARGET_PORT | awk '{print $1}'| tac)
if [ -n "$SOURCE_IP" ] ; then
LINES=$($IPTABLES -L --line-number -n | grep $COMMENT | grep $SOURCE_IP | grep $SOURCE_PORT | awk '{print $1}'| tac)
debug "Previous postrouting lines: "$LINES
# DELETE UNECESSARY LINES FROM PREVIOUS RULES
@@ -88,7 +90,22 @@ postrouting() {
done
fi
debug "$IPTABLES -I POSTROUTING -d $TARGET_IP -p $PROTOCOL --dport $TARGET_PORT -m comment --comment "$COMMENT" -j MASQUERADE"
debug "$IPTABLES -I POSTROUTING -s $SOURCE_IP -p $PROTOCOL --dport $SOURCE_PORT -m comment --comment "$COMMENT" -j MASQUERADE"
$IPTABLES -I POSTROUTING -d $SOURCE_IP -p $PROTOCOL --dport $SOURCE_PORT -m comment --comment "$COMMENT" -j MASQUERADE
if [ -n "$TARGET_IP" ] ; then
LINES=$($IPTABLES -L --line-number -n | grep $COMMENT | grep $TARGET_IP | grep $TARGET_PORT | awk '{print $1}'| tac)
debug "Previous postrouting lines: "$LINES
# DELETE UNECESSARY LINES FROM PREVIOUS RULES
if [ -n "$LINES" ] ; then
for i in $LINES; do
debug "$IPTABLES -D POSTROUTING $i"
$IPTABLES -D POSTROUTING $i
sleep 0.1
done
fi
debug "$IPTABLES -I POSTROUTING -s $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
}