[afnog] NTOP

[Bruce Zamaere]

Hi Guys,

>From my little experience! I have experienced the same thing when I tried
running ntop on my gateway (my box has close to 3Gigs of RAM) it does just
that... run for a few minutes and then just dies on me (FYI this has
happened on a CentOS and FC4 box for me). What works for me is to run ntop
on a standalone PC (i.e. the machine is only doing network monitoring
stuff). I agree that ntop is really resource hungry! Of course I must add
that depending on the statistics you want to keep track of you may need to
modify the topology and place the Monitoring PC in an ideal location. For
example on a switched network you may not get interesting stats so I
normally throw in a hub like in the diagram below:


--------------------------------
                                                       |  External Network
|

-------------------------------
                                                                     |
                                                            _____|____
                                                            |
|
 ---------------                          -----------       | Gateway |
|   NTOP   |                         | HUB  |       |________|
|   BOX     |                         |______|              |
|________ |                           |   |    |_________|
       |____________________|    |
                                               |
                             ------------------------------
                              |  Internal Network  |
                              ------------------------------

I certain won't go anywhere with my ascii art but I hope this helps.

regards,

bruce.
On 8/17/06, Phil Regnauld <regnauld at x0.dk> wrote:
>
> On Thu, Aug 17, 2006 at 03:53:08PM +0200, Antonio Godinho wrote:
> > Hi all,
> >
> > Is there a way of running ntop in such a way that it does not consume
> all
> > the memory and then crashes if the traffic is too high?
>
>         Version of Ntop ?
>         OS ?
>
>         If it's FreeBSD, I fear that there's some threading issues between
> Ntop
>         and FreeBSD that cause this.
>
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