[156001] in North American Network Operators' Group
Re: Blocking MX query
daemon@ATHENA.MIT.EDU (Ibrahim)
Tue Sep 4 06:19:13 2012
In-Reply-To: <CAPz7E51bsZe+39H7aAWY1CqjPbW2r4Yhm5Ju4RU+pxxmik4K2A@mail.gmail.com>
From: Ibrahim <ibrahim1@gmail.com>
Date: Tue, 4 Sep 2012 17:18:16 +0700
To: Bacon Zombie <baconzombie@gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Not block, but we use DNS transparent proxy mechanism. We need to do this
as our government request all ISP to block porn sites :-)
Regards
Ibrahim
On Tue, Sep 4, 2012 at 5:13 PM, Bacon Zombie <baconzombie@gmail.com> wrote:
> Are you saying that you only allow your subscribers to use your DNS Serve=
rs
> and block access to all other DNS Server?
>
> On 4 September 2012 11:07, Ibrahim <ibrahim1@gmail.com> wrote:
>
> > Hi All,
> >
> > I've read old archive about blocking SMTP port (TCP port 25). In my
> current
> > situation we are mobile operator and use NAT for our subscribers and we
> > have few spammers, a bit difficult to track it because mostly our
> > subscribers are prepaid services. If we block TCP port 25, there might =
be
> > "good" subscribers will not be able to send email.
> > We are thinking to block MX queries on our DNS server, so only spammer
> that
> > use their own SMTP server will got affected. All DNS queries from our
> > subscribers already redirected to our DNS cache servers. But seem Bind
> > don't have feature to block MX query. Any best practice to block MX
> query?
> >
> >
> > Regards
> > Ibrahim
> >
>
>
>
> --
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>
> BaconZombie
>
> LOAD "*",8,1
>
