[tor-dev] Scaling tor for a global population
mikeperry at torproject.org
Sun Sep 28 04:04:55 UTC 2014
> 5. Invest in the Tor network.
> Based purely on extrapolating from the Noisebridge relays, we could
> add ~300 relays, and double the network capacity for $3M/yr, or about $1
> per user per year (based on the user counts from:
> Note that this value should be treated as a minimum estimate. We
> actually want to ensure diversity as we grow the network, which may make
> this number higher. I am working on better estimates using replies from:
> Automated donation/funding distribution mechanisms such as
> https://www.oniontip.com/ are especially interesting ways to do this
> (and can even automatically enforce our diversity goals) but more
> traditional partnerships are also possible.
> Result: 100% capacity increase for each O($3M/yr), or ~$1 per new user
> per year.
Naif's point about there being 100Mbit residential uplinks out there
suggests that there may be a hybrid approach here.
If this vendor could detect super-high-speed client uplinks, they could
ask only these users if they wanted to be non-exit relays. But this is
complicated, as it also requires understanding if the user's ISP will
get upset at the traffic consumption or the fact that a listening TCP
service is running. For example, I know Comcast calls their residential
service "unlimited", but yells at you if you transfer more than 250GB in
a month, or if they discover any listening TCP ports on your IP address.
Even if we could figure these problems out by looking up ISP policy
based on client IP address, I think we still need to fund exit relays. I
don't think we can just enlist random home users connections to be exits
without giving them a wall of text explaining how to deal with issues
that may arise.
So this may be something to consider to reduce network expenditure, but
it won't completely eliminate it.
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