Re: [tor-talk] How long does it take for websites to discover new exit nodes?

[Iain Learmonth <irl@xxxxxxxxxxxxxx>]

Hi,

On 19/05/2019 00:38, jiggytwiggy@xxxxxxxxxxxxx wrote:
> As we know, many sites block Tor while others have awful CAPTCHAs.
> 
> However, new exit nodes are created all the time.
> 
> Does anyone know how often sites check the public exit node IP list and
> add them to their databases of exit nodes?

It is likely true that many sites that block Tor do so due to the
detection of a single abuse event. When you have ~2 million simultaneous
users sharing a couple of thousand IP addresses, this is going to
happen. They may not be specifically blocking Tor, although in other
cases they are.

The topic of exit censorship is an open research question. Some options
were described in:

https://blog.torproject.org/tors-open-research-topics-2018-edition#exit-censorship

Thanks,
Iain.

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