[tor-talk] SKKU43 Tor relay (was Re: Metrics fast exit page)

Hyoung-Kee Choi hkchoi at gmail.com
Mon Feb 10 09:36:36 UTC 2014


We are the academic research group located in Seoul, Korea. One of my
students happened to misconfigure the bandwidth parameter in his Tor during
his research on the Tor bandwidth scanner. Then, the advertised bandwidth
jumped up to the high number and drew a number of circuits in the last days
or so. We switched the number back to the automatic adjustment right after
checking your email in this list. We are still running SKKU43  in order for
the advertised bwauth value to return to normal.

I apologize for this happening to you and the Tor community.



On Mon, Feb 10, 2014 at 12:45 PM, Roger Dingledine <arma at mit.edu> wrote:

> On Tue, Feb 04, 2014 at 02:24:39AM +0100, Karsten Loesing wrote:
> > There are two new graphs available as replacement:
> >
> > https://metrics.torproject.org/network.html#advbwdist-perc
> >
> > https://metrics.torproject.org/network.html#advbwdist-relay
> Wow -- check out those URLs today.
> And then see
> https://compass.torproject.org/#?exit_filter=all_relays&links&sort=cw&sort_reverse&country=&top=10
> which currently lists SKKU43 as 11% of the advertised bandwidth, and
> 7.3% of exit weights:
> https://atlas.torproject.org/#details/9E4C3E2597AD49CED745BE024ED620B88BBBF002
> This relay advertises a self-measured bandwidth of 1GByte/s:
> https://exonerator.torproject.org/serverdesc?desc-id=2c414fc08f7cbb3b4b09a5cd5014cf03d12d20ca
> which is fine because self-measured bandwidth isn't used (at least
> not directly) by clients. But then the torflow bwauths measure it at
> w Bandwidth=10000 Measured=1230000 (moria1's opinion)
> w Bandwidth=10000 Measured=67000   (gabelmoo's opinion)
> w Bandwidth=10000 Measured=1450000 (tor26's opinion)
> w Bandwidth=10000 Measured=617000  (maatuska's opinion)
> Leading to a median of 617000 weight, which is more than twice the
> second-most-weighted relay:
> https://atlas.torproject.org/#details/E0113C18726D3AD74D6081C43D2539CA9A0A8745
> I think IPredator is actually carrying the traffic it claims. But I find
> SKKU43's bandwidth line fishy-looking:
> bandwidth 1200000000 1200000000 1000000000
> So I guess the first question is, does it look like SKKU43 is actually
> as good at carrying traffic as it appears to be?
> And the second question is, should we lower the caps in torflow on how
> much weight it will give a single relay? Or are the caps already low
> and there's a bug?
> Fun times,
> --Roger
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