[tor-talk] single entity running >36% exit probability with 5 relays? scary.

Rob Jansen rob.g.jansen at nrl.navy.mil
Thu Dec 10 19:36:08 UTC 2015

> On Dec 10, 2015, at 2:25 PM, David Goulet <dgoulet at ev0ke.net> wrote:
> On 10 Dec (19:04:02), nusenu wrote:
>> take a look at the "e_prob" column:
>> https://github.com/nusenu/tor-network-observations/blob/master/2015-12-10_relay-families.txt
>> How did he manage to get such a high consensus weight
>> (~10x ipredator's cw)?
>> these four relays were first seen on 2015-12-10 04:00:00
>> are down since a few hours now
>> https://atlas.torproject.org/#search/contact:robgjansen
> Hi!
> This morning I noticed a huge spike in the estimated exit probability
> per continent graph and network capacity graph:
> http://ygzf7uqcusp4ayjs.onion/tor-health/tor-health/index.html
> After a bit of investiguation turns out 3 new relays were advertising a
> HUGE bandwidth.
> I contacted the person (it's a known Tor researcher at NRL) and he
> realized they were mis-configured advertising way too much bw. It should
> be fixed soon hopefully but they are 3 real exit nodes.

That is definitely an error! I rebooted the nodes but it appears that their consensus weights in the latest consensus have not been corrected. So I just took them down now.

> However, the humongeous weights are concerning since they were very
> "young" relays in the lifetime of a relay so it worth investiguating and
> thinking if this is normal or maybe a bug?

Is not a bug; we were investigating a way to more quickly stabilize to an accurate weight. Obviously, we misconfigured that process. Sorry about that!

I think at this point I should go back to a stable release and maybe generate new keys to avoid this mistake again.

All the best,

> Cheers!
> David
>> btw: thanks for setting an apparently proper myfamily config.
>> --
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