Hi Simone,
We've been able to get ntopng to work by bridging the two ethernet
interfaces using the raspbian operating system instead of through
ntopng.
We're able to get the correct data by running the following command line:
ntopng -i br0 -m "192.168.99.0/24"
We're now trying to get ntopng on the raspberry pi to send the data to
an offsite pc running ntopng as well (currently we're testing this
locally between a raspberry pi and a windows laptop).
It appears we're able to get them to talk to each other but the data
shown on the windows laptop (receiver) is not showing all data while
the raspberry pi appears to be showing all data. It also takes a while
to update.
The command we're running on the raspberry pi is:
ntopng -i br0 -m "192.168.99.0/24" -I tcp://*3456 --zmq-encrypt-pwd TestPass
On the windows laptop the command we're running is:
ntopng /c -i tcp://<local address of raspberry pi>:3456
--zmq-encrypt-pwd TestPass
Are these the correct commands to run so that the windows laptop
receives the data from the raspberry pi so that we can setup the
raspberry pi onsite and view the data via our windows laptop (keep in
mind we would adjust the address of the raspberry pi to the wan
address of the site it's at when onsite)?
If not can you provide the correct full command line to achieve this
for both the windows laptop and raspberry pi?
We also noticed that while running it like this the windows laptop
console reports "Collecting flows on tcp://<local address of raspberry
pi>:3456 [ntopng->nprobe]" Does this mean it's expecting an nprobe on
the raspberry pi or is this information incorrect?
It is possible to pull data from an offsite ntopng to a local ntopng,
no nprobes needed?
Is it possible to adjust how often the offsite ntopng updates it's
information to our ntopng install?
Thanks for the assistance.
CTSG
Quoting Simone Mainardi <[email protected]>:
Hi,
On Mon, Jul 25, 2016 at 2:55 PM, <[email protected]> wrote:
Hi Simone,
-Would the PI3 would be OK for a full 24mbps ADSL2+ connection if placed
between the modem and the first switch in series at full speed?
I would say yes although I recommend you to do some testing.
-I understand the PI3 would work using mirror port on the switch, but for
customers without a managed switch what steps, if any are required to make
the PI3 work in series like the EdgeRouter. I would add 2x ethernet
adapters. 1 for modem, 1 for switch and 1 for management if required and
any config steps?
in that case, I would set the rpi with a bridge interface
-i<modem>,<switch> so that you can intercept all internet traffic and use
the management interface to control the rpi
-I plan on using only ntopng at all sites using PI3s with a licensed
version at our office with individual adapters configured for each off-site
ntopng.
-Im hoping the PI3 in series will not slow down connections up above
100mbps? In which case it would be future proof for our up coming national
internet connections upgrades and could be used in series between the modem
and the switch. I guess the only way to achieve this, if a slow down is
present is using a managed switch and mirror port.
-If a slow down is present as above, and the PI3 is used via a mirror port
and not in series, does it provide a full ntopng experience or are the flow
etc limited?
if ntopng is used in passive mode, that is, it receives traffic from a
mirror port, then it won't affect network performance at all.
-I notice the command for the PI3 starts nprobe also. I will be trying to
use ntopng on the PI3 without nprobe if possible. Is the paid nprobe
required for the ability to use the PI3 in series between the modem and the
switch?
no it is not required, you can just use ntopng.
Thank you!
CTSG
Quoting Simone Mainardi <[email protected]>:
Hi,
On Sat, Jul 23, 2016 at 4:10 PM, <[email protected]> wrote:
Thank you very much Simone,
Currently we are not using nProbe and did not see any SMB traffic. I will
test this again on Monday but we have the ntopng installed on a 20+ PC
network and did not see any SMB traffic.
OK Thank you 1 license move is allow. We better confirm the hardware we
would like to use as the server before purchasing.
Our Goal is:
We run a small business IT support company. I would like to put remote
probes at approx 5 to 10 customer locations to monitor their network as
they are often limited to 6 to 10mbps internet connections. We are
looking
to monitor high bandwidth users.
-If ntopng is used at remote locations does it support encryption of the
data like nprobe?
yes, see option
--zmq-encrypt-pwd <pwd> | Encrypt the ZMQ data using the
specified password
-Would you recommend a pi3, UBNT EdgeRouter or a PC to be used for the
remote probes to provide a good full speed service?
for 6-10Mbps all the options are good.
-I am assuming the EdgeRouter does not need a switch with a mirror port
and would act in series between the modem and the first switch?
correct, this is a common way to place the edge router. In this way you
will be able to catch all the traffic from (and to) the internet. Other
additional setups are possible using the same edge router.
Note that only nprobe is presently available for the edgerouters.
Does the Pi3 with extra Ethernet adapters act the same or do they require
a mirror port attached?
You should be able to use the rpi3 as if it was an edgerouter provided you
add an extra ethernet adapter.
-When using a pi3 or UBNT EdgeRouter do they slow the network down?
Typically no. Clearly this depends on the traffic. For 6-10Mbps no slow
down will be perceived.
-If ntopng does support encryption and we are not needing flow data, do
we
use the community version on all of the remote sites and collect this
data
with a licensed version at our office? Or when using ntopng at remote
sites
instead of the nprobe is a license required?
you may want to use a licensed version of ntopng at your office to have
extra features such as reporting and a realtime dashboard. However this is
not strictly necessary and you can implement your solution using just
community versions.
I like the software and the output so i am just trying to sort out which
versions are best used and the hardware required.
Once i have the remote sites planned and hardware selected what email
should i use to discuss license orders?
you can use the contact form on the ntopng website. Your email will be
routed properly.
Thank you
CTSG
Quoting Simone Mainardi <[email protected]>:
Hi, see below inserted reply
On Fri, Jul 22, 2016 at 5:30 AM, <[email protected]> wrote:
Hi Simone,
Thank you again for your time.
We have defined the local network and also the correct adapter on the
service. We now have usable current data. Though we do notice ntop does
not
seem to be capturing any local SMB traffic. So if we copy a large file
from
1 PC to another on the same subnet it doesn't seem to show anywhere in
ntop. I see an old reference to IP Mon section with local to local
traffics
in help guides but i cannot find any such data when making the file
copy.
Also no flows or devices represent the amount of data or speed we are
transferring.
If you are using ntopng in combination with nProbe, then this is
normal.
File transfert are typically long-flows and nProbe will wait flow
completion before reporting that data to ntopng. You can tune nProbe
export
frequency using :
[--lifetime-timeout|-t] <timeout> | It specifies the maximum (seconds)
flow
| lifetime [default=120]
[--idle-timeout|-d] <timeout> | It specifies the maximum (seconds)
flow
| idle lifetime [default=30]
Small Business License: From looking it appears this is tied to the
hardware? If we change the PC running ntop do we need to purchase
another
license? or just request a new key?
license is tied to the hardware. We may allow up to une hardware switch
per
license but this has to be decided on a case-by-case basis.
We want to use ntop on cheap a laptop for now until looking at embedded
style devices.
that's fine. Did you know you can also run ntopng on embedded devices
such
as ARM (raspberry pi), MIPSEL, etc.?
Thank you
CTSG
Quoting Simone Mainardi <[email protected]>:
Hi, see below
On Thu, Jul 21, 2016 at 1:42 AM, <[email protected]> wrote:
Hi Simone,
Thank you for your time.
Thank you. We would like the best possible data from the capture so
we
should at least check the outcome using nProbe.
We are using version 2.4.270616
I had a look through the interface to see if any configuration needed
to
be pointed to local network. Can you advise what config you were
referring
to please?
see option -m
If we would like to try nProbe using a Windows PC could you please
provide
the install commands to get both services talking on the same
required
port
etc.
here is a good example
http://www.ntop.org/ntopng/creating-a-hierarchical-cluster-of-ntopng-instances/
there are just few small differences in the way you execute the
command
on
windows. This is documented in the manual.
Will only mainly be used off mirror ports on a single subnet with both
probe and ntopng on the same host. Rarely will we be looking at
anything
more than a single switch and network when using ntopng.
Thank you again
CTSG
Quoting Simone Mainardi <[email protected]>:
Hi, please see below
On Wed, Jul 20, 2016 at 7:05 AM, <[email protected]> wrote:
Hi All,
We would like to use ntopng installed on a windows laptop connected
to
a
mirror port on a network switch to monitor and report on network
traffic
to
determine issues across the network.
Using ntopng connected to a switch port with mirror configured; is
nProbe
required?
it is not strictly necessary in your case. Provided that you don't
need
deep packet dissection features (e.g., to dissect DNSm BGP, VoIP,
etc),
then ntopng may suffice.
We appear to still get some flows shown in ntopng with nprobe
removed
but
i'm not positive the flow data is complete. Also I notice the
interface
total bandwidth graph at the bottom of the pages is not displaying
any
data.
- update ntopng to version >= 2.4
- make sure to define local networks in the configuration
Could someone please let us know the basic setup for a >Smart
Switch>?nprobe?>ntopng>Windows laptop.
if you are mirroring a switch port, then nprobe is not strictly
necessary
provided that you don't need information extracted by nprobe plugins
http://www.ntop.org/products/netflow/nprobe/
Is nProbe only required when trying to source data from a netflow or
sflow
compatible router device?
this is just one case. nprobe is required also for deep traffic
dissection
features. It is also useful to decouple monitoring from
visualization.
For
example, you can deploy multiple nprobes on the vantage points of
your
network and collect their results on a remote ntopng.
Knowing the above intended use what would be the best install
command
for
either service please?
Thank you
CTSG
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