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IDS: Allow to inspect traffic from or to OpenVPN

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This commit allows to configure suricata to monitor traffic from or to
OpenVPN tunnels. This includes the RW server and all established N2N
connections.

Because the RW server and/or each N2N connection uses it's own tun?
device, it is only possible to enable monitoring all of them or to disable
monitoring entirely.

Fixes #12111.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
This commit is contained in:
Stefan Schantl
2019-12-17 13:06:29 +01:00
committed by Arne Fitzenreiter
parent a1cf33ca8f
commit 51b63b4186
2 changed files with 25 additions and 3 deletions
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10
html/cgi-bin/ids.cgi
View File

@@ -49,6 +49,11 @@ my %ignored=();
# the list of zones in an array.
my @network_zones = &IDS::get_available_network_zones();
# Check if openvpn is started and add it to the array of network zones.
if ( -e "/var/run/openvpn.pid") {
push(@network_zones, "ovpn");
}
my $errormessage;
# Create files if they does not exist yet.
@@ -59,7 +64,8 @@ my %colourhash = (
'red' => $Header::colourred,
'green' => $Header::colourgreen,
'blue' => $Header::colourblue,
'orange' => $Header::colourorange
'orange' => $Header::colourorange,
'ovpn' => $Header::colourovpn
);
&Header::showhttpheaders();
@@ -839,7 +845,7 @@ END
$checked_input = "checked = 'checked'";
}
print "<td class='base' width='25%'>\n";
print "<td class='base' width='20%'>\n";
print "<input type='checkbox' name='ENABLE_IDS_$zone_upper' $checked_input>\n";
print "&nbsp;$Lang::tr{'enabled on'}<font color='$colourhash{$zone}'> $Lang::tr{$zone_name}</font>\n";
print "</td>\n";

18
src/initscripts/system/suricata
View File

@@ -29,7 +29,7 @@ IPS_OUTPUT_CHAIN="IPS_OUTPUT"
NFQ_OPTS="--queue-bypass "
# Array containing the 4 possible network zones.
network_zones=( red green blue orange )
network_zones=( red green blue orange ovpn )
# Array to store the network zones weather the IPS is enabled for.
enabled_ips_zones=()
@@ -86,6 +86,22 @@ function generate_fw_rules {
if [ "$zone" == "red" ] && [ "$RED_TYPE" == "PPPOE" ]; then
# Set device name to ppp0.
network_device="ppp0"
elif [ "$zone" == "ovpn" ]; then
# Get all virtual net devices because the RW server and each
# N2N connection creates it's own tun device.
for virt_dev in /sys/devices/virtual/net/*; do
# Cut-off the directory.
dev="${virt_dev##*/}"
# Only process tun devices.
if [[ $dev =~ "tun" ]]; then
# Add the network device to the array of enabled zones.
enabled_ips_zones+=( "$dev" )
fi
done
# Process next zone.
continue
else
# Generate variable name which contains the device name.
zone_name="$zone_upper"