7 votes

Who pays for the network?

I pay for it, I run a relay. You too could help cover the cost of providing the service to users if you have the resources to spare, some time to work through some documentation and the inclination. ...
  • 10.8k
4 votes

Are slow relays useful for the network?

No, a very slow (whatever that means) relay would not help. No traffic is directed to a relay below a certain bandwidth threshold. Any adversary can disregard all nodes below that threshold when ...
4 votes

How does Tor protect against flooding with artificially long circuits

The type of attack you are describing is a congestion attack. In theory, the simplest form of such an attack would be a general DoS on the Tor network. Taking things one step further, a congestion ...
3 votes

Who pays for the network?

Actually, the people who host the nodes. It's quite common to have an unmetered/unlimited Internet plans, so running a node costs no more than a regular Internet usage. Sometimes people do run it on ...
  • 5,471
3 votes

How much does it cost to run the Tor network if we divide it per Tor user?

Yes, someone already tried to do the calculation: To sum up, that would make the entire Tor network run for approximately $90,000 a month or $1,072,860 a year. Roughly the price for a (very) small ...
3 votes

How can an external observer detect if a malicious relay does excessive logging?

There is no way short of the hypothetical attacks you mentioned to determine if a relay is excessively logging. Excessive logging is a criterion for considering a relay malicious but that doesn't mean ...
  • 205
3 votes
Accepted

How long does it take for an IP to be removed from the exit nodes list?

It takes about 1 day for an IP address to be removed from the most recent exit list, but that directory contains exit lists published in the past 3 days. So, that's 4 days for an IP address to ...
  • 1,459
2 votes

Are slow relays useful for the network?

Actually, I think that might not be the case... If we were to grow the network to have more fast relays than users, that would most likely harm the anonymity. There would be high probability that each ...
  • 21
2 votes
Accepted

Is it a problem to frequently change a Tor relay's fingerprint

The relay would be considered 'new' each time. It would never gain the 'stable' flag or gain much consensus weight. This would neither hurt nor help the network.
  • 3,745
1 vote

Self health check for Hidden Service

I solved this issue with following: RendPostPeriod N (I set it on 20 minutes) (seconds|minutes|hours|days|weeks) Every time the specified period elapses, Tor uploads any rendezvous service descriptors ...
  • 41
1 vote

Self health check for Hidden Service

Create a file named checkifisonline.sh (give it permission read and write) allow Executable ) working in ubuntu or whonix or in tails drag and Drop in the terminal and hit enter .. *remember to ...
  • 11
1 vote
Accepted

Are Tor connections *that* unstable?

Is there a way to enfource a new route towards my hidden services so I can circumvent the peers that are failing? From the Tor Project website, we see: An onion service needs to advertise its ...
  • 2,191
1 vote

Orbot as a middle relay - does it make any sense?

Using your phone as a relay will take up some of your phones computing power but what I'd be worried about is mainly the bandwitdth, if you lose connection to wifi you will use up data quickly. Along ...
1 vote

How can we get more community-operated (non-NSA) Tor relays set up?

I think it is important to continue to spread the word. I can see my peers opening up to Tor after they understand it is not 'just for criminals' but serves a greater purpose for everyone. My way of ...
1 vote

If my network link is subject to frequent, short, outages (a gentle form of DoS attack?), can this help promote other nodes to guard before mine?

Here's my 2nd answer: If someone else is trying DoSing you over the Tor network there is a chance that this will be prevented from the guard relay. If not it could be an advantage for other relay ...
1 vote

How can Tor users and Tor Network protect themselves from an exit node that is actively logging or manipulating exit traffic?

There is procedure in Tor for reporting bad relays: https://trac.torproject.org/projects/tor/wiki/doc/ReportingBadRelays Send email to address bad-relays@lists.torproject.org and describe the ...

Only top scored, non community-wiki answers of a minimum length are eligible