On 28 Jun 2016, at 10:45, Moritz Bartl moritz@torservers.net wrote:
On 06/28/2016 02:36 AM, Tim Wilson-Brown - teor wrote:
Can I run a hidden service from the same server as a tor
relay (which openly exposes the IP address)? From the same server, yes. If you use the same tor process, it's possible to tell which tor process is hosting both the relay and the hidden service.
Likely also if you just use the same server: there will be downtimes that affect both the relay and other services on the same machine, so someone who monitors both consensus and onion service availability can easily correlate the events.
Yes, Moritz is right - you can correlate server downtimes when services run on the same server.
When tor runs both a relay and onion service, you can correlate at least: guards, event loop delays, and server downtime. I think there are also other security issues involved, which is why we don't recommend this configuration.
Tim
Tim Wilson-Brown (teor)
teor2345 at gmail dot com PGP 968F094B ricochet:ekmygaiu4rzgsk6n