Hi,

> On 9 Nov 2019, at 14:27, Michael <srmyc...@yahoo.com> wrote:
> 
> That didn't work but I should have been more precise. This is a ZMQ interface 
> receiving flows from nProbe. Neither nProbe or Ntopng are capturing. I tried 
> running nProbe with --bpf-filter "not port bootps" but flows between 0.0.0.0 
> and 255.255.255.255 still show. Is there a way to apply this filter to Ntopng 
> for flows received from Nprobe, or to Nprobe for collected Netflow data?

OK, in that case you have to use option --collection-filter on nProbe. Use a 
/32 to exclude the single address. See:

--collection-filter <filter>        | Filter applied to collected filters only 
(-3). Filter format:
                                    | [!]<asX | network/mask> (! means discard 
flows matching filter)
                                    | Multiple filters can be defined using 
multiple --collection-filter options.
                                    | Filter examples: !as12345, 
192.168.0.0/24, !10.0.0.0/8



Simone

> On Thursday, November 7, 2019, 09:12:45 AM EST, Simone Mainardi 
> <maina...@ntop.org> wrote:
> 
> 
> Hi,
> 
> You can use a BPF filter:
> 
> -B "not port bootps"
> 
> 
> Simone
> 
>> On 7 Nov 2019, at 12:31, Michael <srmyc...@yahoo.com 
>> <mailto:srmyc...@yahoo.com>> wrote:
>> 
>> Is there a way to hide flows for DHCP traffic? I keep seeing the flows 
>> between 0.0.0.0 and 255.255.255.255 for clients looking for an IP address.
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