Vidalia exit-country

M moeedsalam at gmail.com
Thu Aug 21 09:06:01 UTC 2008


Ok, Camilo, let me get this straight.

1) Strict Exit Relay Management is for limited the exit node to one country.

2) Exclude Relay Management, is for excluding certain countries, but does it
exclude it as a exit node or as a TOR node?

Also, will it still form a connection yet not use it? Or should it not even
form a connection?

Here's my problem. I have excluded USA and UK from the dropdown list using
ctrl key as you said and added them, but i see that connections are still
formed with them as a TOR node and also as exit nodes.

NOt only that, I also noticed that it even routed my request through an exit
node through UK, specifically:

achaycock (Online)
Location:
London, GB
IP Address:
78.86.55.121
Platform:
Tor 0.1.2.19 on Windows Server 2003 Service Pack 2 [server] {terminal
services, single user} {terminal services}
Bandwidth:
111 KB/s
Uptime:
13 hours 20 mins 22 secs
Last Updated:
2008-08-21 04:03:38 GMT

What am i doing wrong?

On Thu, Aug 21, 2008 at 5:18 AM, Camilo Viecco <cviecco at anml.iu.edu> wrote:

> Hello M
>
> Thanks for giving it a try. I have comments inline
>
> M wrote:
>
>> Hello friends I'm new on the list. I hope you bear with my questions and
>> problems.
>>
>> I just installed Camilo's version of Vidalia, and it seems i have a couple
>> of problems:
>>
>> 1) You can only exclude one country from the "invalidnodes" settings.
>>
> You can do multiple selections by pressing the 'Control (ctrl)' button when
> selecting
> the second (or next) country.
>
>>
>>
>> 2) You have to exclude it every time you start vidalia (it does not save
>> the settings)
>>
>> Are these bugs in my installation, or is the program like this?
>>
> It is a bug in the program. Exit countries should be saved. Thanks for
> finding it. I will fix it in a few days.
>
>>
>> 3) Also, how much does this reduce anonymity?
>>
>
> Placing any restrictions on the nodes most likely will reduce your
> anonymity. In particular limiting
> the exit country significanly reduces your anonymity as it is much cheaper
> for an attacker to place
> nodes in that country and thus your probability of selecting a 'bad' exit
> is higher.
> Reducining the number of other nodes could 'possibly' be bad for your
> anonymity. Part
> of Tor's attacker model assumes that there are many attackers that will not
> cooperate with each other.
> There might be more academic studies about these effects, but none come to
> my mind at the moment.
> Will let the list give you the pointers.
> (I think 2007 PETS IX attack on Tor would be a place to start
> (http://www.freehaven.net/anonbib/cache/murdoch-pet2007.pdf))
>
> Thank you for noticing AND submitting about the bug
>
> Camilo
>
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