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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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16
votes
3answers
8k views

For how long does a circuit stay alive?

How long does it take for Tor to expire a circuit and pick a new one? Is there a way to control this expiration time?
8
votes
4answers
18k views

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,...
4
votes
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 ...
24
votes
3answers
9k views

How does a Tor client pick Tor nodes for circuit creation?

A Tor client initially contacts Directory Authorities to fetch the consensus (i.e. a file containing all relays of the Tor network at that time with details such as IP address, exit policy, public key ...
11
votes
3answers
5k views

How can a new circuit happen without closing all tabs?

Using the current version (3.5) of the Tor Browser Bundle, how can we switch to a new circuit without losing all tabs and activity? I understand the reason of "New Identity" means everything is ...
3
votes
2answers
2k 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/...
4
votes
2answers
644 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 ...
3
votes
1answer
160 views

How to know the number of circuits through my middle Tor relay?

I am running my Tor relay as middle relay. Is it possible to know how many circuits are there through my middle relay?
3
votes
1answer
718 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 ...
4
votes
1answer
223 views

Where along the path is encryption used?

This question is born out of two questions that I saw coming up. Is the connection between my computer and the Tor network encrypted? How does Tor encrypt my traffic before it sends it to the server?...
3
votes
1answer
477 views

How to implement the modified source code of Tor?

I want to log how many circuits have been made through my Tor onion router (OR). So if I do some changes in the original source code, how can I make my Tor use that changed source code. I am now using ...
4
votes
2answers
222 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 ...
3
votes
1answer
324 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 ...
4
votes
0answers
79 views

How to know the number of circuits through my Tor relay(OR)? [duplicate]

Can anyone tell me how to know how many circuits are being build through my Tor relay(OR)? I am using vidalia.
10
votes
1answer
512 views

Do all relays in a circuit encrypt data response from a server?

I know that when sending data from the Tor client to a server it is encrypted and gradually get decrypted on the way there. This question is about when the server responds. The data must be encrypted ...
11
votes
2answers
806 views

How many distinct Tor circuits are possible?

Given the current relay census, and assuming a standard Tor Browser Bundle installation, approximately how many distinct Tor circuits are possible? Once entry guards have been chosen, approximately ...
6
votes
1answer
273 views

Is it possible to team multiple circuits in the current Tor network?

The client-selected paths that carry traffic through the Tor relay network are called circuits. Tor clients switch circuits at ten minute intervals for better anonymity. However, latency and bandwidth ...
6
votes
1answer
270 views

How much does it cost to change Tor identity?

Assume we are refreshing a web page very quickly and fresh identity is needed for each request. My question is how often we can change IP on Tor network? More briefly how much computation and how ...
13
votes
2answers
2k views

When I click “New Identity”, why do I sometimes end up with the same exit relay?

Three variants on the same question: If I click "new identity" in Tor Browser to get a new circuit, why does my new circuit sometimes have the same exit relay as the last circuit? Doesn't that hurt ...
4
votes
2answers
1k 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 ...
3
votes
1answer
7k 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 ...
3
votes
3answers
200 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 ...
1
vote
2answers
150 views

How does Tor pass my traffic around and should I be worried about malicious relay operators? [closed]

I am not sure how does Tor work, how safe is it as I heard that some relays are ran by bad people or government agencies.