On Thu, Jul 29, 2021 at 9:07 PM Denys Fedoryshchenko <nuclearcat@nuclearcat.com> wrote:

On 2021-07-29 20:46, Randy Bush wrote:
>> Looks like it did shown on news only.
>
> :)
>
> i wondered
They have installed devices called "TSPU" on major operators.
Isolation of specific networks is done without changing BGP
announcements, obviously.

Denys, can you say anything about how these TSPU operate?

I believe they at least swallow/stop TCP SYN packets toward some destinations

(or across a link generally), but I'm curious as to what steps the devices take,

to be able to judge impact seen as either: "broken gear" or "funky TPSU doing it's thing"

thanks!

-chris

 

And the drills do not mean at all "we will turn off the Internet for all
the clients and see what happens", journalists trivialized it.
Most likely, they checked the autonomous functioning of specific
infrastructurally important networks connected to the Internet,
isolating only them.
It's not so bad idea in general, if someone find another significant bug
in common software, to be able to isolate important networks from the
internet at the click of a button and buy time for patching systems.