Re: Reaching out to Sony NOC, resolving DDoS Issues - Need POC

[Hugo Slabbert <hugo () slabnet com>]

> Well, in almost any* case blacklisting reflection vectors by IP is an
> insanely bad practice.
> * — I can *think* of a use case when this could be an appropriate solution
> (I recall Netscout/Arbor once had such a use case), but in the overwhelming
> majority of incidents it is absolutely not, and you need to be one hundred
> percent sure you know what you're doing.


Agreed; drop the vector not the address, but was looking to just clarify
the direction of things a bit.

NB: I have just checked the IP addresses the OP has provided me with
> (offlist) against our database of known reflection sources, and I
> confirm that none of those seem to ever host UDP software vulnerable
> to amplification


ty; good to know.

They decide to completely ignore the emails, it seems like we're being
> either spoofed *or people are attacking us with Sony's IP space*.


So you're getting inbound traffic that has Sony IP space source addresses
in it?  That does start to sound more like people trying to reflect off of
you to Sony.  What's the protocol and destination ports on the traffic
you're receiving with Sony source addresses (and the source ports for good
measure, if they're fairly consistent)?

-- 
Hugo Slabbert       | email, xmpp/jabber: hugo () slabnet com
pgp key: B178313E   | also on Signal


On Tue, Jan 7, 2020 at 10:54 AM Töma Gavrichenkov <ximaera () gmail com> wrote:

> Peace,
>
> On Tue, Jan 7, 2020 at 9:10 PM Hugo Slabbert <hugo () slabnet com> wrote:
> > And you're sure that you are the reflection target not the reflection
> vector?
>
> NB: I have just checked the IP addresses the OP has provided me with
> (offlist) against our database of known reflection sources, and I
> confirm that none of those seem to ever host UDP software vulnerable
> to amplification.
>
> --
> Töma