DNS traffic tracking

[Alex K]

On Mon, May 9, 2022 at 1:51 PM Matus UHLAR - fantomas <uhlar at fantomas.sk>
wrote:

> >On 09. 05. 22 10:34, Alex K wrote:
> >>The initial and current approach is to provide DNS free of charge,
> >>which simplified things for me. Though the traffic in question is
> >>satellite traffic with monthly allowances of roughly 4 to 8GB, thus
> >>every MB counts.
> >>The problem now is that I see sometime 700MB of DNS traffic for 2GB
> >>of Internet browsing within one month.
>
> On 09.05.22 10:47, Petr Špaček wrote:
> >Sounds like either:
> >- Broken caching or,
> >- Random subdomain attack
> >to me.
>
> maybe someone uses VPN over DNS...
> in such case, rate limiting of client comes to mind...
>
That would mean that the clients have access to their own dns servers,
which the firewall does not allow.


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