Re: [tor-relays] Grouping cloud relays running within same provider

[mr.curtis@xxxxxxxxxxxx]

> In its default configuration, Tor ensures that each relay in a circuit
> belongs to another /16 subnet (cf. Tor Path Specification [1], section
> "2.2. Path selection and constraints"). However, in the case of Amazon
> EC2, this constraint does not suffice as Amazon uses IP addresses from
> several different /16 subnets.

As does all of the bigger VPS providers that have connectivity in multiple
countries. But the servers themselves are probably centrally managed
by one company entity -- typically in the US. I would not be surprised
if a single evil sysadmin could access any hypervisor machine having Tor
relays running on them and steal their keys, without the relay operator
noticing anything.


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