[tor-relays] Relay MIGHTYWANG consensus issues and loss of STABLE flag

Mighty Wang wang at mighty.wang
Fri Oct 29 22:28:46 UTC 2021

Hi Eddie

Yes I saw your post on the day it happened and guessed that we are 
suffering from exactly the same issue that started at exactly the same 

I couldn't correlate the loss of stable flag with anything in recent Tor 
server releases but I am going to recheck those; I am currently working 
my way back through the consensus voting lists in the run-up to the 14th 
October to try and understand where the problem started,

I'll report back here.



On 29/10/21 18:57, Eddie wrote:
> Welcome to the club: 
> https://gitlab.torproject.org/tpo/network-health/team/-/issues/128
> Since Georg opened that (on my behalf) I too have lost the Stable flag.
> Cheers.
> On 10/29/2021 9:10 AM, Mighty Wang wrote:
>> Hello fellow operators
>> I have one pretty large relay, MIGHTYWANG which is an IP4/6 guard, 
>> dedicated hardware running on a 1Gb line uncontended. It is usually 
>> one of the top 5 relays by consensus weight but on the morning of 
>> 14th October it lost Guard status on account of losing the stable flag.
>> I checked logs, connectivity and server health - nothing unusual, 
>> everything is generally pretty bullet proof in and around the relay 
>> and it had been running for well over a year without a reboot - just 
>> the very occasional Tor daemon restart following upgrades but no such 
>> activity prior to the 14th.
>> So next I checked the consensus and I see that around half of the 
>> directory authorities seem to be not assigning the stable flag. See 
>> attached screenshot showing current consensus.
>> The peering to each of those relays seems OK from what I can see (IP4 
>> and IP6) so any idea what gives?
>> I've got a MIGHTYWANG sitting here twiddling it's thumbs because have 
>> the directory authorities don't want to use it. Bit of a waste.
>> I had similar things happen a few years ago with one of my old 
>> relays; again no obvious reason, just seemed to be the a random whim 
>> of the directory authorities.
>> I've noticed a couple of other long term relays are in a similar 
>> position - is this some time of attack, deliberate action or just Tor 
>> magic?
>> Wang
>> -- 
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