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Questions tagged [directory]

Questions relating to Tor directory servers and bridge directories

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20
votes
1answer
6k views

Is it possible to look up the public key for a .onion-address?

I know .onion addresses are a (partial) hash of a descriptor which contains a public RSA key, so I was wondering: it is possible to see the public key that is found when connecting to a .onion hidden ...
13
votes
2answers
940 views

Best way to set up a Tor lab?

What would be the best [and cheapest] way to set up a private Tor network for testing and experimentation? A rough size estimate is that it should consist of 12 or more onion-routers and should be ...
13
votes
1answer
899 views

What specifically causes an Exit to get a Bad Exit flag?

The consensus includes details of exits that are flagged as "Bad Exits". What are the specific conditions under which the Bad Exit flag is given to an exit?
10
votes
1answer
2k views

Can anybody explain the Advertised bandwidth, MaxAdvertisedBandwidth, Measured bandwidth, Bandwidth burst, RelayBandwidth rate?

I am confused about a few terms: AdvertisedBandwidth, MaxAdvertisedBandwidth, MeasuredBandwidth, RelayBandwidthBurst, RelayBandwidthRate, BandwidthBurst, and BandwidthRate. Can anyone please explain ...
9
votes
1answer
298 views

Would distributed denial of service (DDoS) attacks on the directory authorities disrupt the Tor network?

Assume someone wants to disrupt the Tor network or maybe bring it down. A powerful attacker could try to DDoS all the directory authorities. As there are only 10 worldwide this seems like an easy task....
9
votes
1answer
280 views

How many clients are typically using Tor simultaneously? How many circuits are simultaneously in use?

From Tor Metrics: Users, I get that there are currently about 2.4 million "directly connecting users". And in Questions and answers about user statistics, I see: Q: So, are these distinct users per ...
8
votes
2answers
245 views

Why does hard coded node 'Faravahar' have a different geolocation (USA) than registrar (Mauritius)?

I was editing an IT Security stack exchange question to add geolocation information to a Tor question and I noticed that one of the 10 hard coded directory authorities is ambiguous about its location: ...
8
votes
2answers
2k views

How can Tor use a one hop circuit to a directory server during initial bootstrap?

The Tor manual says: TunnelDirConns 0|1 If non-zero, when a directory server we contact supports it, we will build a one-hop circuit and make an encrypted connection via its ORPort. (Default: ...
7
votes
3answers
2k views

Searching for Tor hidden networks

What resources are best for search .onion networks within the Tor? Unlike the web where you can search for a domain or portal, what equivalent systems are available for search for Tor specific ...
7
votes
1answer
1k views

In what ways can private relays be used?

There are applications where private relays, not listed in public consensus directories, would perhaps be useful. For example, one might use four-relay circuits with private entry guards and exit ...
6
votes
2answers
14k views

Tor expert bundle on Windows - no installation instructions

Before there was a installer. Now it's just a zip file with no installation instructions. Where do I put the DATA directory? Also when I run tor.exe nothing happens, I see no command line options ...
6
votes
1answer
2k views

Tor over VPN - http status code 404 not found

[warn] Received http status code 404 ("Not found") from server 'x.x.x.x:9001' while fetching "/tor/keys/fp/(40-key-characters and numbers)". Is there a way to allow the keys? Is it important to have ...
6
votes
1answer
163 views

Calculation of bandwidth and measured-bandwidth for votes

In the consensus files there are bandwidth specifications for every router. This (consensus) data originates from the directory authorities votes, which contain a bandwidth as well as measured ...
6
votes
3answers
6k views

Cannot open Tor Browser using Terminal

I recently extracted tor-browser-linux64-6.0a4_en-US.tar.xz on a mounted drive. And tried to start the browser. The Browser didn't open due to not recognizing the .desktop file which starts the ...
5
votes
2answers
51 views

Why do index descriptors use hashes?

According to the Directory Specification: Descriptors were indexed by their digests, in order to prevent malicious caches from giving different versions of a router descriptor to different clients. ...
4
votes
3answers
1k views

How can I get consensus data from Directory authority servers for research purpose?

Dear All Experts out there! I am doing some researches about the Tor Network, and want to frequently download the consensus data from the Directory Authority Servers (let say 5 minutes each). Thanks ...
4
votes
2answers
525 views

How many times does client fetch the consensus file from directory authorities?

I am wondering that how many times a client "talks" to Directory Server (say, it can be a hard-coded Directory Authority Server, or just a normal Directory Server) to fetch the consensus file, knowing ...
4
votes
2answers
1k views

Where does tor look for directory servers?

I'm working on a project and need to determine how tor determines directory authorities. Looking at the source of version 0.2.8.0-alpha-dev (git-d015c70a118e4357) in file or/config.c there are a ...
4
votes
1answer
137 views

How does Tor guarantee server integrity?

As I understood, when a client connects through Tor he connects to the central Tor servers, picks up three (or more) public keys, connects to the first, makes a chain to the second and makes a chain ...
4
votes
1answer
6k views

How many directory servers are there in the Tor networks?

I recently become interested in researching about the Tor network, and do want to do some research about it. I was heard that there are around 10 directory servers which are hard-coded into the Tor ...
4
votes
1answer
294 views

Why does Tor use only one hop instead of three hops to connect to a directory server?

The Tor manual says: TunnelDirConns 0|1 If non-zero, when a directory server we contact supports it, we will build a one-hop circuit and make an encrypted connection via its ORPort. (Default: ...
4
votes
1answer
478 views

Creating Directory Server

I'm trying to create a private Tor network and currently configuring the Directory Server. I run the command tor --list-fingerprint But it returns Clients don't have long-term identity keys. ...
4
votes
1answer
175 views

What does “Directory guard” design means in the following context and could somebody elaborate on this Tor FAQ quote?

Following, please find a quote from Tor FAQ : "Restricting your entry nodes may also help against attackers who want to run a few Tor nodes and easily enumerate all of the Tor user IP addresses....
3
votes
2answers
548 views

Why does directory mirroring get disabled when AccountingMax is on?

I'm the operator of the Tor node strugees. I want to mirror the directory. Apparently everything is working grand, except for the fact that directory mirroring is disabled due to the fact that I have ...
3
votes
1answer
40 views

Where do I find previous Tor consensuses, and other metrics data?

i am looking to do a bit of research on previous Tor consensuses, i am looking to go back years, is there a location that saves every previous consensus ? Thanks Rich
3
votes
2answers
2k views

How can I sync computer's time with Tor?

I know about NTP, but since it's communication is NOT encrypted I don't want to use it. The question is, how can I sync time with Tor proxy? "HTP" protocol can achieve this, but it's not reliable(...
3
votes
1answer
118 views

Can't governments who want to censor Tor just block the directory authorities?

Can't governments who want to censor Tor just block the directory authorities? Or does the client reach the directory authorities to fetch the consensus only after building a circuit so that we have {...
3
votes
1answer
208 views

How Tor Browser knows that a directory server is legit?

How Tor Browser knows that a directory server is legit? Does it have their certificates hardcoded?
3
votes
1answer
3k views

What is the criteria for the V2Dir flag appearing?

I've just read What are good explanations for relay flags? to get a feel for what flags could possibly appear on my new relay (which is an image from Tor Cloud, but with torrc modified to be a relay ...
3
votes
1answer
53 views

Does Tor client connect to multiple Directory Servers?

In my pcap file capturing Tor traffic, there are connections to 2 Directory Servers (x.x.x.x:9001 and y.y.y.y:443) and they started nearly at the same time. My question is that is it normal or not? ...
3
votes
0answers
35 views

why is the weight for guards in exit position equal to weight of both guard ans exit flagged nodes for exit position?

Why is the weight factor Weg set equal to Wed in tor code (in file dirvote.c)? How does it still result in correct probabilities?
2
votes
2answers
1k views

How is data encrypted and decrypted in onion routing?

I read that onion proxy adds a layer of abstraction for each onion router in a route,and each onion router just removes a layer of encryption then does onion proxy knows about all onion routers in the ...
2
votes
1answer
88 views

What prevents directory server from being attacked?

I understand that the first thing a Tor user do is connect to a directory server to obtain a list of tor nodes, which can be found here: https://atlas.torproject.org/#search/flag:authority What ...
2
votes
1answer
260 views

implementation for Tor directory server?

Is the code of the Tor directory servers open sourced? If i would like to run my own for the purpose of experimenting, what is the easiest way to do it?
2
votes
2answers
499 views

Why does a restart cause a relay to lose the Guard and HSDir flag?

Why does a restart cause a relay to lose the Guard and HSDir flag? I understand that the Guard and HSDir flag are based on time in the network. However, why is it important when the last restart ...
2
votes
1answer
80 views

What does tor proxy and tor directory stores?

Does tor proxy includes keys that it shares with all tor nodes for encryption?who stores information about all tor nodes in the route?
2
votes
1answer
317 views

Does Directory Traffic count towards Consensus Weight?

When I have a node running, lets say an Entry Guard, that also acts as a Directory Mirror. Will the bandwidth used sending directory information also count towards the consensus weight? And if so or ...
2
votes
1answer
47 views

How many descriptors can be retrieved in one request using the descriptor digest?

in the Tor dir-spec.txt I can see a note stating that due to squid proxy url limitations it is only possible to download 96 descriptors when using the fingerprints. Does this also apply to the ...
2
votes
1answer
107 views

If a client has a not-so-not-fresh consensus (<24hr), does he download the whole consensus again directly or from a relay?

If a client has a not-so-not-fresh consensus (<24hr), does he download the whole consensus again directly (by reaching to the directory authorities) or from his guard relay (client<=>guard relay&...
2
votes
1answer
70 views

What are the immutable characteristics that uniquely identify a relay?

In other words, what are the system "ingredients" that are not allowed to change without triggering attribution of a new fingerprint and the restart of the "ramp up" / flagging process? Please ...
2
votes
1answer
228 views

How does handshake with directory server work?

How does handshake with directory server work in the standard setup? How does it work when you configure Tor Browser to use a custom bridge?
2
votes
1answer
31 views

What hidden services does my relay node know about?

I built tor from source and am running it as a relay (not exit node) and also as a directory server. It is my understanding that after a while I should experience V2 hidden services publishing their ...
2
votes
1answer
479 views

Tor relay loading informations

i've recently decided to support Tor throught a new relay, then i taked one of my server with debian 8 and follow the steps on torproject website after installing the most recently tor i've edited the ...
2
votes
0answers
507 views

How do bandwidth authorities measure bandwidth?

After reading a number of questions and resources on bandwidth measurements and life cycle of tor relays: can anyone tell me about the bandwidth weights? Can anybody explain the Advertised bandwidth,...
2
votes
0answers
3k views

No route to host

My laptop computer has Debian stable 7 installed and I downloaded the 64bit Tor. I am unable to connect to Tor, the error message is below: Tor failed to establish a Tor network connection. ...
2
votes
0answers
168 views

sudden change in port number of closest relay when changed to pasing traffic of Firefox through Tor network

I understand to obtain the complete successful results out of Tor, is it mandatory to use Tor browser bundle. But sometimes, for a general user, Firefox is much tempting to use for many reasons as a ...
2
votes
0answers
126 views

Exit node to Directory Server not using one hop circuit

I've built a tor (2.4.19) test environment. Clients build circuits and all seems to function properly. However, I noticed that while my entry and relay nodes communicate with the directory server ...
1
vote
2answers
184 views

What would happen if directory authorities were compromised or taken down?

If many directory authorities are compromised or offline, is it still safe to use Tor? What are security and anonymity consequences for Tor users of such an attack on directory authorities?
1
vote
1answer
357 views

How is hidden service directory protected from DOS?

What is the maximum number of hidden services DHT (Distributed Hash Table) can hold? Who maintains the directory? What stops anyone from creating a huge list of hidden services (onion addresses) that ...
1
vote
1answer
70 views

Set up Tor as internal Network

My company is looking to use Tor internally for our network, using our own directory authority server, and would like to know if it's possible and how to do it Bonus points if we could use it for ...