[Ntop] VLANs and NTOP

[Burton Strauss]

Yup that's the right location!

A passive tap (US$500 or make 'em yourself from the instructions at
snort.org) on the trunk works great...

I wonder, however, if a bridge requires handling VLAN tags.

-----Burton 

-----Original Message-----
From: ntop-bounces at unipi.it [mailto:ntop-bounces at unipi.it] On Behalf Of
Rivalino Matias Jr.
Sent: Friday, August 05, 2005 12:29 PM
To: ntop at Unipi.IT
Subject: RE: [Ntop] VLANs and NTOP

Diego,

I think Burton said ntop need be located in a place where it can see the
VLAN tags, like on the trunk (e.g. switch to switch layer 1 connection). It
is possible, for example, running ntop in a linux bridge box. In this case
you can put the box (ntop+linux bridging) between two switches.

Rivalino.

-----Original Message-----
From: ntop-bounces at unipi.it [mailto:ntop-bounces at unipi.it]On Behalf Of Diego
de Oliveira
Sent: Friday, August 05, 2005 11:48 AM
To: ntop at Unipi.IT
Subject: Re: [Ntop] VLANs and NTOP


Thanks Burton,

    Really, You're be right. I´m going to find a NIC that support 802.1Q,
because today I don't have one.

best Regards

----- Original Message -----
From: "Burton Strauss" <Burton at ntopSupport.com>
To: <ntop at Unipi.IT>
Sent: Friday, August 05, 2005 12:04 AM
Subject: RE: [Ntop] VLANs and NTOP


> Depends on your LAN setup.  If ntop sees the tags (say it's tapping a 
> trunk), then it reports them.  If it doesn't see the VLAN tagged 
> packets, it won't (can't) report them.
>
> -----Burton
>
> -----Original Message-----
> From: ntop-bounces at unipi.it [mailto:ntop-bounces at unipi.it] On Behalf 
> Of Willy, Andrew
> Sent: Thursday, August 04, 2005 4:29 PM
> To: 'ntop at unipi.it'
> Subject: RE: [Ntop] VLANs and NTOP
>
> VLAN tags are stripped before they're sent to the host aren't they?
>
> Andrew
>
> -----Original Message-----
> From: Diego de Oliveira [mailto:diegooli at terra.com.br]
> Sent: Thursday, August 04, 2005 12:01 PM
> To: ntop at Unipi.IT
> Subject: [Ntop] VLANs and NTOP
>
>
> HI Folks !
> Does Anyone know , how can I configure the Ntop tool for shown me 
> vlans tag?
> is it possible?
>
>
> Regards,
>
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