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List:       tor-talk
Subject:    [tor-talk] Does Tor have any limits on the amount of inbound connection per source IP?
From:       "Fabio Pietrosanti (naif) - lists" <lists () infosecurity ! ch>
Date:       2016-12-06 11:37:10
Message-ID: 25db4ad9-3c7a-33c3-2e63-ef268539abef () infosecurity ! ch
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Hello,

i was wondering if Tor do have any limits on the amount of inbound
connection per source IP?

My question is whenever a Tor Relay could be subject to DOS attack by a
single powerful server (let's say that with a single IP) but with some
powerful GPU to accelerate RSA operations?

I'm wondering if a single server with a powerful GPU (ie: Amazon AWS
with GPU) could trigger 50.000/RSA&second operations with 50.000
newconnection/seconds to a single Tor Relay?

That's to ask if there's some kind of limits in place to prevent a
possible DOS attack like this, by evaluating the amount of asymmetric
crypto operations per source IP / time and deciding whenever to slow it
down.



-- 
Fabio Pietrosanti (naif)
HERMES - Center for Transparency and Digital Human Rights
http://logioshermes.org - https://globaleaks.org - https://tor2web.org -
https://ahmia.fi
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