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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138 views

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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719 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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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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389 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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633 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
381 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
349 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
204 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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1k 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
3k 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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122 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 ...
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716 views

Tor circuit selection

Quick question - is it possible to 'exclude' or 'bypass' certain Tor Circuits? Example: At this moment it shows the circuit as France - Netherlands - France. What I am wondering is, can I tell Tor to ...
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1answer
45 views

TOR switched bridges

I open TOR with a bridge to a foreign country. During use when I opened a new tab the bridge switched to USA. I never saw this happen before. Is it suspicious or normal activity?
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Tor failed to establish a Tor network connection [duplicate]

Please help me! Tor gets as far as establishing a circuit, then fails. It says: Tor failed to establish a Tor network connection. Establishing a Tor circuit failed (connection timeout - 161.53.160....
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1answer
2k views

Tor circuit display in Tor Browser - how can it?

If all the nodes in a Tor circuit aren't supposed to know about each other, how can the Tor Browser display the whole circuit? If it knows all the addresses in the chain, can't someone else pull that ...
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Is a Tor or cloudflare update the reason I suddenly getting cloudflared to death?

All of a sudden almost every site, including this one cloudflares me, some I have to refresh the Tor circuit over 50 times to get it to work, and then it it dies within a few mins. The thing is, this ...
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Why does Torbutton circuit view not consistently show the correct exit node?

Making an arbitrary number of new identities will eventually cause the circuit view in Torbutton to show the wrong exit node. This is a screenshot I took to show the problem. Notice Torbutton thinks ...
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1answer
343 views

I'm building lot's of circuits. What could cause this?

I run a relay. It has a SocksPort listening, but I don’t use it as a client for anything at the moment. It also hosts a hidden service. From time to time I get warnings like this: [warn] Your ...
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2answers
395 views

Can somebody force my Tor circuits to always start from his “guard node”, to access my traffic?

The first node after "my browser" is always the same. I am worried to see that even when asking for "new identity" or "new circuit", it restarts always by the same IP address in France. I have no ...
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2answers
70 views

What prevents CircID collision from happening?

When a Tor OP wants to extend a circuit, it sends a relay extend cell to the last node on it. This node then sends CREATE cell to the desired destination node, choosing a new CircID (used to identify ...
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1answer
271 views

Tor circuit chaining

Is it possible to use multiple tor circuits chained together? tor_circuit --> tor_circuit --> ... --> tor_circuit I know of a solution on windows using tortilla for windows that allows ...
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1k views

Displaying the Tor circuit via terminal

I'm using Debian 7 server. I will try to use proxychains. Is it possible to see the current Tor circuit (IP addresses) via terminal?
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How does Tor client build circuits when using a bridge?

When using a bridge, if my own Tor client builds the circuit, how does it know relays IP addresses (middle and exit IP addresses and their public keys) ? Does it take them from the bridge?
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217 views

Login to site.com, request “New Tor circuit for this site”, site.com still recognizes original login

Using TorBrowser, login with username and password on site.com (e.g., google, amazon, etc.), then ask TorBrowser for "New Tor circuit for this site." Why does site.com (sometimes) recognize this "new ...
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3answers
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Can Tor's IP sharing be dangerous?

I am novice to Tor, but before using it I have gone through lot of websites. An article explained that Tor is dangerous the following reason: Consider an IP 1.2.2.2 which was assigned by Tor to user ...
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9k views

Tor Browser Bundle (TBB) new circuit versus new identity

I have experimented in the Tor Browser Bundle with the Tor Button's choices of "new circuit for this site" and "new identity". "New circuit" appears to affects only the open tab and creates a new ...
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2answers
249 views

How does Tor protect against flooding with artificially long circuits

Since the path and the length of a circuit can be chosen by a modified client an attacker could make it arbitrarily long and thus multiply the the impact of his traffic on the network by the amount of ...
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991 views

Suddenly my Tor hidden service isn't available

I created a Tor hidden service (a server binded to localhost port and torrc config'd to use the 127.0.0.1 xxxx) for clients to connect to. It was working great for a month or so, and now no one can ...
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1answer
617 views

How does TOR extend circuit to a third node?

I am reading the Tor: The Second-Generation Onion Router article and my question is that how TOR extends circuit to a third node? On page 7 of the article,left column, it says: To extend the ...
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844 views

Orbot is able to open a circuit, but browser check still doesn't confirm using Tor

According to the Orbot Log the program was able to open a circuit. But if I run a browser check, it still tells me that I am not using tor. I also uses a bridge, but the result stays the same. How ...
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1answer
7k views

Is the Tor browser always using at Tor ciruit?

I'm using the Tor browser (4.5.3) and when I press the green onion I can see the current Tor circuit that's in use at the moment. Now, is the browser always using a Tor circuit? Because sometimes when ...
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1answer
453 views

First Circuit Server Constant (New Identity) [duplicate]

No matter what I am trying, I can't change the first server in the circuit. Neither "New Identity" nor "New Circuit" or closing the browser will change it. I tried two different tor instances from ...
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Stem: How to get current in-use circuit?

I am able to list the circuits, but for some reason I'm never able to quite get a circuit alone consistently, there always appears to be many of them with state BUILT. This is especially true after I ...
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1answer
2k views

Programmatically changing Tor circuit

Is it possible to change Tor circuit using Javascript or configuring it to change Tor circuit in a certain interval?
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1answer
116 views

Why exactly is it not recommended to exclude relays?

I'm doing some research on Tor for a paper and stumbled upon this section on the Tor FAQ page, where it says how to choose or exclude certain nodes from your circuit. Below it says that it is not ...
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1answer
900 views

How to assign a stream to a circuit?

I have a Python script that is configured to connect to 4 different onion services (call them a, b, c, d), and return a value on a page. I'd like to ensure that I create separate circuits to connect ...
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2answers
3k views

How to prevent a circuit from changing between browser tabs?

In the current versions of Tor (4.5.1) every time a new tab is opened a new circuit is made - causing the ip to change. Consider the following scenarion: User logs into firstsite.com - session/...
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490 views

What circuits connect to the introduction and rendezvous point?

If accessing an onion service, how much commonality is there between the circuits that connect to the introduction point, the rendezvous point, and the exit node for non-onion service usage? I ...
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506 views

Why does this website is taking infinite time to load on Tor Broswer?

http://www.hao123.com/ The above mentioned website is taking infinite time to load in the Tor Browser. However if I open it without using Tor, it loads instantaneously. Any guesses why this behavior? ...
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760 views

How can I randomize the entry guard?

Tor is moving to a single entry node implementation (#11480). I think that's because it's statistically feasible for an adversary to deploy entry and exit nodes and perform a correlation attack by ...
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269 views

return path selection

i could not find a detailed explanation about how return path is defined. It is mentioned somewhere that exit node encrypts data multiple times. But how dose exit node gets the public key of first ...
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1answer
107 views

How feasible is that Directories grant you only compromised nodes to build the circuit from?

I asked this question about Tor and how secure are the first steps before the circuit is made (the guy who answered me, lead me to this site which i didn't know). Please correct me if I'm wrong (or ...
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2k views

Accessing Tor hidden services over a single hop circuit

I will presage the expected warnings before posting my question: I fully understand the security risks involved using single hops, however, with regards to my goals I have zero need for anonymity. I ...
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1answer
72 views

Path selection constraints not working as expected

From Section 2.2 of the path specification We do not choose any router in the same family as another in the same path. (Two routers are in the same family if each one lists the other in ...
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1answer
224 views

Which protocol has the better perfomance TAP or NTor

Just wondering, which protocol, TAP or NTor is less computationally intensive for a relay to process and why ? Thanks Rich
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How to change the entry node?

When Tor changes circuit it only changes middle node and exit node, the entry node stays the same since the Tor started, so I guess the entry node is limiting the traffic if you make too much traffic,...
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1answer
208 views

Why Atlas does not show all exit nodes Tor connect to simultaneously?

At times Tor connect to several circuits (and different exit nodes) to support multiple protocol simultaneously, In these cases, why Atlas does not show all exit nodes Tor connect to simultaneously? ...
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Weighted Bandwidth for Rendezvous Points

I wonder how the WeightedBandwidth for Rendezvous Points (RPs) is calculated. I know, its a bit complicated, because RPs are chosen in a lot of different ways: Tor tries to reuse existing circuit ...
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Probability by bandwidth: Using multiple or one Relay with equal total Bandwidth

Is there a higher probability, if an attacker is using one OR of bandwidth 5 MB/s than 5 ORs with each 1 MB/s? If you calculate the probability of picking a certain OR, you can use the weighted ...