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suricata: Use iptables lock to ensure rules are being inserted

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Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
This commit is contained in:
Michael Tremer
2021-04-02 15:33:42 +00:00
parent da3edeeecf
commit f78eb45c09
2 changed files with 10 additions and 9 deletions
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18
src/initscripts/system/suricata
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@@ -62,9 +62,9 @@ function get_cpu_count {
# Function to flush the firewall chains.
function flush_fw_chain {
# Call iptables and flush the chains
iptables -F "$IPS_INPUT_CHAIN"
iptables -F "$IPS_FORWARD_CHAIN"
iptables -F "$IPS_OUTPUT_CHAIN"
iptables -w -F "$IPS_INPUT_CHAIN"
iptables -w -F "$IPS_FORWARD_CHAIN"
iptables -w -F "$IPS_OUTPUT_CHAIN"
}
# Function to create the firewall rules to pass the traffic to suricata.
@@ -137,19 +137,19 @@ function generate_fw_rules {
# Loop through the array and create firewall rules.
for enabled_ips_zone in "${enabled_ips_zones[@]}"; do
# Create rules queue input and output related traffic and pass it to the IPS.
iptables -I "$IPS_INPUT_CHAIN" -i "$enabled_ips_zone" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
iptables -I "$IPS_OUTPUT_CHAIN" -o "$enabled_ips_zone" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
iptables -w -I "$IPS_INPUT_CHAIN" -i "$enabled_ips_zone" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
iptables -w -I "$IPS_OUTPUT_CHAIN" -o "$enabled_ips_zone" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
# Create rules which are required to handle forwarded traffic.
for enabled_ips_zone_forward in "${enabled_ips_zones[@]}"; do
iptables -I "$IPS_FORWARD_CHAIN" -i "$enabled_ips_zone" -o "$enabled_ips_zone_forward" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
iptables -w -I "$IPS_FORWARD_CHAIN" -i "$enabled_ips_zone" -o "$enabled_ips_zone_forward" -m mark ! --mark "$MARK"/"$MASK" -j NFQUEUE $NFQ_OPTIONS
done
done
# Clear repeat bit, so that it does not confuse IPsec or QoS
iptables -A "${IPS_INPUT_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
iptables -A "${IPS_FORWARD_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
iptables -A "${IPS_OUTPUT_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
iptables -w -A "${IPS_INPUT_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
iptables -w -A "${IPS_FORWARD_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
iptables -w -A "${IPS_OUTPUT_CHAIN}" -j MARK --set-xmark "0x0/${MASK}"
fi
}