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Questions tagged [circuit]

A Tor circuit is a private network pathway built incrementally as a series of encrypted connections through relays on the network.

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Why is the pub-key of diffie hellmann from Alice (OP) to Bob (OR) encrypted?

For building a circuit Alice contacts Bob (OR) and send her pub diffie-hellmann key encrypted with Bobs pub key. Bob sends his public-diffie-hellmann key and the session key hashed ("only" TLS ...
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Track Tor circuit via ISP logs

I have some question about the very basics of tor, as this keeps bugging me now for some time: As far as I know every tor node is only aware of the ip address of the following node. For example the ...
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1answer
21 views

The problem about stem's new_circuit and extend_circuit?

I have read the document of Stem. I notice that new_circuit() and extend_circuit() can create new circuit.However,I have two problems: I can't make sure when I create a new circuit, will the old ...
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49 views

Share circuit on localhost:9050 to the rest of the internal network

Might be a little off-topic but I don't know maybe it's more related to tor than networking. Basically, I have the following scenario I want to accomplish: home access point is 192.168.1.1, ...
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I have the latest version of tor browser and it does not show the enter and exit addresses. How do I configure it so it shows this?

I have the latest version of tor browser and it does not show the enter and exit addresses. How do I configure it so it shows this? The last version I used 2 years ago would show the connection ...
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69 views

Differences between Onion Routing (Public Key) and Tor-Circuit (Session Key)

I have a hard time understanding how a message is transmitted, when the Public Keys are used and when the Session Keys. Tor Client connects to a directory server to get a list of active relays & ...
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51 views

How can I be sure, that the entry node, middle node and/or the exit node are not operated by the same operator?

How can I be sure, that the entry node, middle node and the exit node are not operated by the same operator? Of course there is a small chance that this happens. But can the operator of the entry node ...
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path not available as it once was with Vidalia

A few upgrades ago, TOR vidalia easily displayed the path I used and where the exit node was (which country or continent). The newest releases seem to hide this information, which seems like a ...
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circuit_build_no_more_hops: Bug: 2-hop circuit 0x7fd6935ce4c0 with purpose 5 has no guard state

For research, I need to create custom circuits using stem. I ran code, but a warning occurred in Tor application: [warn] circuit_build_no_more_hops: Bug: 2-hop circuit 0x7fd6935ce4c0 with purpose 5 ...
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43 views

Orbot cannot connect to curcuits

Xperia XA1, Android 8, Orbot 0.3.4.9 NOTICE: Bootstrapped 85%: Finishing handshake with first hop Circuit (4) BUILT: dBeelial Circuit (3) BUILT: 0x3d009 NOTICE: Bootstrapped 90%: Establishing a Tor ...
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1answer
575 views

Tor 8 no longer has Green Onion with option to change circuitcharley

My PC auto-updated to Tor 8 and I no longer have the green onion on the left side of the browser where I can check my circuit or change to a new circuit. Can I roll back to an earlier version of Tor ...
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89 views

customizing tor browser bundle

I want to create a browser bundle that supports the following things: there is a standalone tor process that i launch it using the controller connection from the stem library and i manually connect ...
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944 views

Why Tor doesn't support UDP?

Tor relays reject UDP packets except DNS requests. What is the technical reason behind that UDP is not routed through Tor circuit? Are there limitations with UDP protocol that it cannot be routed ...
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283 views

Signal NEWNYM vs Stream isolation

Resources. This answer explains well what happens at NEWNYM request, and I also dig into the code, yet my lack of knowledge on low level networking prevents me to make a proper design decision if ...
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75 views

would torify use the same circuit as tbb when both are in operation?

Let's say I'm using both tbb and torify at the same time. For e.g. I'm using tor to browser/look at tor.stackexchange.com. At the same time I am running torify on a different url say https://aaa.bbb....
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166 views

Every entry node is in the USA [duplicate]

With this tor version (I can't tell you because it isn't shown anywhere in the browser) every entry node is from the USA only. I'm always trying to avoid any node from USA or little britain. But it ...
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427 views

Tor circuit for this site (-unknown-)

Whatever website I am on, it's never displayed in the "Tor circuit for this site" panel. It always says "(-unknown-)". Is this a problem?
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78 views

Tor connection comparison inquiry

I am new to Tor and I have been trying to understand its inner workings. I was wondering how many extra trips across the Internet are in a connection to Tor hidden service compared to directly ...
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1answer
959 views

“New Tor circuit for this site” does not work?

I'm using Tor for some time now. It seems that "New Tor circuit for this site" has stopped to work. I use Tor to access libgen.io. When Netherland is the last (before internet) node, no matter how ...
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Hacking Tor in my spy/thriller novel

Question: What are plausible circumstances in which one could hack an individual Onion Router to discover the location of the previous router? Reason: I’m an aspiring writer, working on a spy-...
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1answer
121 views

Hacking Tor through RAM

Is it possible to identify the middle router by extracting data from the RAM of the exit router?
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1answer
97 views

Data saved in Onion Routers

I’m an aspiring writer, working on a spy-thriller novel with Tor as part of the plot. Is it hypothetically possible to hack an individual Onion Router to discover the location of the previous router? ...
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1answer
10k views

WARN: Failed to find node for hop 0 of our path. Discarding this circuit

Not exactly what to however I have recently moved to windows 10 and I can no longer use tor. When ever I try to connect, it never moves past 85% and spams 04/07/17 15:52:23 PM.600 [WARN] Failed to ...
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38 views

OR Forward and reverse keys

It's my understanding that between the user and an OR there are two symmetric keys, one for sending data forward and another for receiving data. These keys are forged according to either TAP, which ...
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257 views

Tor encryption combination

I'm trying to understand exactly how Tor builds a circuit with encryption. I've read the Tor design literature and have a pretty good grasp on it, however I'm left with the following misunderstanding. ...
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1answer
138 views

torsocks over torsocks? (by accident)

Sometimes I'll $ torsocks --shell, then forget I'm in a torified shell and hours later do $ torsocks curl https://website.com. Does torsocks know not to do tor over tor? Is there some kind of idiot ...
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2answers
159 views

Does Tor choose nodes from nearby countries to create circuits?

I am from a European country, and usually the circuits created by Tor include nearby European countries (although Tor sometimes chooses nodes from remote countries, but this is very rare). My question ...
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1answer
711 views

Does tor browser open a new circuit for each unique website?

What is the limit of circuits. For example if I open 100 unique domains will TOR make 100 different circuits or does this have some upper limit?
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317 views

Same first node [duplicate]

In TOR Browser 6.5.2 if I do 'New Tor Circuit for this site', I get the same first node and IP address on the new circuit every time I hit new circuit. It always used to differ. If I quit out of TOR ...
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1answer
916 views

Auto - New Tor Circuit For This Site or New Identity

Building a JS chat for local network. Users are based on IP addresses. I want to open a URL in Tor Browser with a new circuit or a new identity after a set of defined seconds automatically. Is there ...
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0answers
47 views

How do I verify the Tor Circuit duration? [duplicate]

I'm thinking of having JavaScript code send messages to my server. How do I go about it? Is there a better way? Edit: How do I find out the exact duration for which a Tor circuit exists before ...
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1answer
374 views

Tor Circuits vs Channels vs Connection

With respect to Tor source code, what is the different between 1- Circuits 2- Channels 3- Connections And how do they relate to each other? Thanks.
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48 views

Fate of Tor circuits upon resuming an hibernated computer

When a user's computer (not a relay) having established Tor circuits goes down into operating system defined states of deep sleep (hibernates) - to be restarted (awoken) at a later time - is state ...
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1answer
239 views

Tor and Submarine communications cables

According to the papers leaked by Snowden, the NSA has the ability to intercept communications carried by submarine cables. My question is: does Tor also use these submarine cables? So, can Tor be ...
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1answer
514 views

How to list all tor circuits that have ever been established

I can get the current with this stem code. #!/bin/python from stem import CircStatus from stem.control import Controller with Controller.from_port(port = 9051) as controller: controller....
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1answer
223 views

Can I configure tor always to try to use three DIFFERENT countries?

I tried to find an answer to this question but I found none. I think it would be reasonable to be able to use always three DIFFERENT countries in a circuit if possible. Just as simple as that. And it ...
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40 views

Looking for Conflux code

I'm looking for source code of Conflux tool, published here. There's statement: 'We implemented the multipath construction and cell sequencing, buffering, and reordering in the Tor source code (...
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2answers
91 views

Cannot run control.py in order to find IP

I am following this post in order to find the tor exit node IP. Running the proposed script ( see below), I get the error: Traceback (most recent call last): File "/mnt/.rot//ip.py", line 6, in &...
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Tor's circuits behaving in an unusual manner

As I understand it, Tor uses the same circuit for about 10 minutes or as specified in the MaxCircuitDirtiness option in the torrc file. However, I noticed something strange while trying to use curl to ...
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490 views

Prevent Changing Exit Node

How to prevent changing exit node when browsing? (same IP address until browser restart) Note that it is not enough for me to specify just certain domains to have one IP - all domain visits must have ...
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2answers
409 views

Implementing the tor protocol, based on tor sources and a few clarifications

Im trying to implement a simple c# application that is based on tor protocol, without identity changes every few minutes etc. just to create a circuit and make a request. I created the onion hidden ...
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283 views

Using Circuits in Parallel

Is there some easy method to use circuits in parallel in TOR using the STEM API. I wanted to use Website A for Circuit A and Website B for Circuit B. The problem is using threading the event listener ...
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511 views

Tor browser 6.5-A1 not showing circuit

i just updated Tor to the newest version (6.5-A1) and i have a problem. since the update, for every site, when i try to look at the circuit, i just see this: While it should be like this While its ...
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2answers
261 views

Entry Node exactly the same for days. 100 request to change and remains same [duplicate]

I'm worried. I connect to exact same entry node for days. Even after 100 new circuit requests, it hasn't moved. Am I being watched? How can I get TOR to connect to different first node?
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Tor Circuit failed to be created: destroyed

Okay, so I'm running a few experiments on Tor for a course project. I keep on changing different relays to see the effects on response time. But on some of the circuits, I keep on getting this ...
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1answer
233 views

How is Path Selection done in Tor?

Can anybody explain how path selection is done in Tor because the man page fail to specify in detail on how certain probabilities are calculated etc. In the man page there are a set of equations: ...
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1answer
184 views

Circuit failed to establish

I'm trying to build my own circuits using stem: These are three different error messages I get from time to time: Circuit failed to be created: DESTROYED Circuit failed to be created: TIMEOUT Unable ...
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2answers
850 views

Tor is only assigning circuits from a very limited subset of exit nodes

I am researching Tor, and as part of my research I was curious how many distinct exit relays a real-world client would include in building circuits. For my purposes, I am only interested in US exit ...
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2answers
2k views

What happens with TCP connections on SIGNAL NEWNYM?

When I send the NEWNYM command tor will build new circuits. I'm wondering what happens with open TCP connections. Will tor wait a certain timeout to give them a chance to close, or do I break those ...
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1answer
88 views

Tor exit node is Forum spammer [closed]

When I researched the exit node for the tor circuit I was given, I saw that it was a forum spammer. Even after changing my identity , the new exit node was still listed as a forum spammer. Is this ...