7
votes
Accepted
What happens with TCP connections on SIGNAL NEWNYM?
Requesting a NEWNYM over the control port will tell Tor to consider the currently used circuits "dirty" (this normally happens after 10 minutes, with a few exceptions), at this point it will no longer ...
- 10.9k
6
votes
How to change the entry node?
To actually answer your question, since nobody did that until now:
shutdown Tor
delete /tor/state file
restart Tor
In case you use TorBrowser on Windows the path is ...\Tor Browser\Browser\...
- 161
5
votes
Accepted
Does tor browser open a new circuit for each unique website?
In Tor Browser, every domain gets it's own circuit. The Design and Implementation of the Tor Browser document has some more details on it.
Frankly, you get an own circuit for every domain shown in ...
- 1,342
5
votes
Can Tor's IP sharing be dangerous?
Regarding the question "Can you be arrested?", yes, you can be arrested all the time. In most countries you can be arrested for looking funny at a police officer. In most countries you will also be ...
- 183
4
votes
How does Tor client build circuits when using a bridge?
Yes, they are taken from the bridge.
Every bridge has the latest directory information cached (just like any directory mirror), and Tor clients fetch them directly and build circuits with the bridge ...
- 725
4
votes
WARN: Failed to find node for hop 0 of our path. Discarding this circuit
Tor needs an accurate clock to work correctly.
Please sync your time with an NTP (Network Time Protocol) server.
Debian family
On Debian based machines use package ntpdate.
sudo ntpdate -v pool....
- 660
3
votes
Does Tor insert random delays or perform packet re-ordering to make the discovery of the communication path harder?
@Jens's answer has a great description of current Tor. The Tor-Browser adds some additional defenses, namely:
it enables HTTP pipelining, so that several requests can be sent on the same "batch"
it ...
- 387
3
votes
Tor circuit selection
Yes you can.
Settings in torrc:
StrictNodes 1
ExcludeNodes {fr}
Read more on how to configure your torrc file here.
- 344
3
votes
Accepted
Tor Browser Bundle (TBB) new circuit versus new identity
Your question does contain an accurate description of these features. But I think I can add some useful information.
New Circuit:
appears to affect only the open tab and creates a new circuit for ...
- 438
3
votes
Can somebody force my Tor circuits to always start from his "guard node", to access my traffic?
Yes. An attacker can perform a sybil attack or just kick down your guard node repeatedly until your Tor client choose a malicious node as guard.
Controlling your guard node doesn't lead to decrypting ...
- 725
3
votes
Is it possible to make a program that will use different circuit for each request? Even if the requests are parallel?
I don't think so, at least natively. Looking at the manual for Tor, it doesn't look like there is any kind of functionality built in that would allow you to do that.
Theoretically, you could do ...
- 2,264
2
votes
Can somebody force my Tor circuits to always start from his "guard node", to access my traffic?
You keep using the same guard node for a long time. This is by design.
See this question: Why is a longer guard rotation period with fewer guards better than the other way around?
Even if someone ...
- 3,665
2
votes
What prevents CircID collision from happening?
There's a misunderstanding here. CREATE cells are sent just from immediate neighbours in a circuit, during circuit construction. So a client will send a CREATE cell to the entry node, where the ...
- 2,219
2
votes
Login to site.com, request "New Tor circuit for this site", site.com still recognizes original login
Requesting a new circuit will get you exactly that -- a new circuit. It does not mean that Tor won't pick the same exit again, and it will not clean any cookies. It is trivial then of course for a ...
- 21
2
votes
Implementing the tor protocol, based on tor sources and a few clarifications
Step 7 is a TLS socket, not just raw TCP.
"I created the onion hidden service, and i want to try make a http request to it", there are additional steps required for onion services which you'll know ...
- 10.9k
2
votes
Does Tor choose nodes from nearby countries to create circuits?
No, Tor chooses nodes randomly. There are a lot of Tor nodes in Europe. So, you'll often see that your connections are using European nodes. (So does everybody else.)
- 250
2
votes
torsocks over torsocks? (by accident)
Torsocks sets the LD_PRELOAD environment variable to intercept a few system calls.
It does not matter if you use it recursively:
# at first $LD_PRELOAD is unset
$ echo $LD_PRELOAD
# when we start ...
- 1,342
2
votes
Why are entry nodes allowed to know that they are entry nodes?
The network doesn't make the distinction of entry relays. Any Tor client is allowed to use any relay for any hop of the circuit (except with restrictions on the exit relay). To limit the types of ...
- 3,112
2
votes
Accepted
Why can't a modified guard node compromise the network?
These types of attacks aren't possible in Tor because of Tor's ntor handshake and Tor's authenticated directory documents generated by the directory authorities.
Tor clients download a trusted (and ...
- 3,112
2
votes
How TBB commands tor to use a "New Circuit for this Site"?
Short: it does not send a command. It creates new connection to SocksPort, using different credentials, and sends new requests to domain through it.
Details:
Tor do isolates streams to different ...
- 31
2
votes
Accepted
Determining circuit tor client is using
Tor clients keep a pool of circuits and may use several circuits simultaneously for streams depending on factors such as exit policies, stream isolation, etc. So there is generally not a single "...
- 3,112
2
votes
Accepted
understanding tor cell structure
In simple words:
CircID serves the purpose to separate the circuits = onion 3-node chains. As it described in design - I'm citing: The header includes a circuit identifier (circID) that
specifies ...
- 5,900
2
votes
Tor safe when taking future in to account?
Quantum threat is a real thing, especially in context of Shor's algorithm for a possible attack vector, for example. But there're a lot of quantum-resistant things like LWE and some EC's, so - using a ...
- 5,900
2
votes
Accepted
How do TOR nodes select the CircID's when creating, or extending, a circuit?
A circuit ID identifies a circuit on an OR connection. If this OR connection is between two relays, either relay can make new circuits on that OR connection. If a relay wants to create a new circuit, ...
- 3,112
1
vote
How to list all tor circuits that have ever been established
There's no log for this kind of information - and for a good reason: it can hurt the privacy and anonymity of Tor. You can - technically - poll Tor regulary through Stem and keep the log for yourself, ...
- 5,900
1
vote
Can I configure tor always to try to use three DIFFERENT countries?
TLDR This may not be a good idea, and may harm your anonymity, the best thing to do is to leave Tor do its own routing algorithm. It can however be (approximately) implemented through torrc.
https://...
1
vote
How is Path Selection done in Tor?
Route calculations are based around the available bandwidth of each of the candidate nodes for a given circuit. In the formulae in your question, W is the weight ascribed to a given node, with full ...
- 3,135
1
vote
Circuit failed to establish
https://gitweb.torproject.org/torspec.git/tree/tor-spec.txt#n1167
10 -- TIMEOUT (Circuit construction took too long)
...
11 -- DESTROYED (The circuit was destroyed w/o client TRUNCATE)
...
- 10.9k
Only top scored, non community-wiki answers of a minimum length are eligible