[tor-relays] Exit probability

Sebastian Urbach sebastian at urbach.org
Sun Oct 29 14:20:47 UTC 2017


Hi,

Both servers do not have the Exit flag but every other flag necessary to 
become an Exit and Exit policies are also present. That could indicate some 
port trouble:

"Exit" -- A router is called an 'Exit' iff it allows exits to at least one 
/8 address space on each of ports 80 and 443. (Up until Tor version 0.3.2, 
the flag was assigned if relays exit to at least two of the ports 80, 443, 
and 6667.)

The Exit probability is 0 without the Exit flag. 200 Exit connections 
without the Exit flag ? Seems ylto be weird...
--
Sincerely yours / M.f.G. / Sincères salutations

Sebastian Urbach

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Am 29. Oktober 2017 14:05:26 schrieb "Dr Gerard Bulger" <gerard at bulger.co.uk>:

> How is exit probability counted?  Is it only port 80 exit tested?  I exit 
> many 1000s of ports, including 443, but not those of high risk of abuse 
> emails and thus upsetting the ISP.  So port 80 along with others are 
> blocked.  I realise no port 80 limits the use of the exit so not expecting 
> so see a high probability of exit. But Atlas shows none.
>
> Currently of some 3000 connections 200 are exit.
>
>  Tor atlas show exit probability of 0.0000%
>
> Gerry
>
>
> -----Original Message-----
> From: tor-relays [mailto:tor-relays-bounces at lists.torproject.org] On Behalf 
> Of teor
> Sent: 29 October 2017 12:45
> To: tor-relays at lists.torproject.org
> Subject: Re: [tor-relays] sum of consensus weight of 2 relays running at 
> the same IP
>
> On 29 Oct 2017, at 23:30, Toralf Förster <toralf.foerster at gmx.de> wrote:
>
>>> On 10/29/2017 01:24 PM, teor wrote:
>>> Possibly.
>>>
>>> Are the relays CPU-limited, or bandwidth-limited?
>>
>> Not at all, neither limited by a config value nor by the hardware
>> (1GBit/s, 200 MBit/s guaranteed, i7-3930, all non-Tor processes have
>> "nice" in front, ids are 1AF72E8906E6C49481A791A6F8F84F8DFEBBB2BA and
>> 6EABEBF38CE7E3DF672C4DB01383606FE3EB2215)
>
> I'm sorry, this doesn't help me answer your question.
>
> Usually, a relay is limited by either the available network bandwidth, or 
> by the speed of a single CPU core on the machine.
>
> If the first relay used all the available bandwidth, then two relays will 
> eventually have lower consensus weight values.
>
> If the first relay used all of a single CPU core for its main thread, then 
> the two relays will eventually have similar consensus weight values.
>
> T
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