Hi,
From wikipedia:
All DHCP packets travel as UDP datagrams; all client-sent packets have source
port 68 and destination port 67; all server-sent packets have source port 67
and destination port 68
; )
Martín Ruiz
Ibersystems Solutions, SL
Dpto. Redes Inalámbricas
Tel. 902 430 367
669 37 95 21
Fax 93 758 63 01
http://www.ibersystems.es
martinr...@ibersystems.es
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-----Mensaje original-----
De: mikrotik-boun...@mail.butchevans.com
[mailto:mikrotik-boun...@mail.butchevans.com] En nombre de William Esteves
Enviado el: lunes, 27 de abril de 2009 3:28
Para: mikrotik@mail.butchevans.com
Asunto: Re: [Mikrotik] Block DHCP server
i got this problem too, but the solution on my network is block de mac and go
to the house that are the dhcp activated, cause this traffic pass trough my
aps... and im using ap2000 on towers... block this ports only on the server
dont be a real solution on this case... but its can be effective if you have mk
on the towers
> From: co...@magtelwireless.com
> Date: Thu, 9 Apr 2009 11:10:24 -0500
> To: mikrotik@mail.butchevans.com
> Subject: Re: [Mikrotik] Block DHCP server
>
> Don't forget port 68 as well.
>
> On Thu, Apr 9, 2009 at 10:41 AM, Josh Luthman
> <j...@imaginenetworksllc.com>wrote:
>
> > If I wanted to block a DHCP server at a customer's house (say a Linksys
> > plugged in backwards) from the CPE (MT) what filter rules would I need?
> >
> > I have tried blocking port 67 both tcp and udp as well as src and dst - but
> > when I know a customer is providing DHCP the packet counts never go up. I
> > am using the forward chain, this customer does not have a bridge interface.
> >
> > Josh Luthman
> > Office: 937-552-2340
> > Direct: 937-552-2343
> > 1100 Wayne St
> > Suite 1337
> > Troy, OH 45373
> >
> > Those who don't understand UNIX are condemned to reinvent it, poorly.
> > --- Henry Spencer
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