opening up (exit policy) a bit ...

Sebastian Hahn mail at sebastianhahn.net
Sat May 8 18:56:00 UTC 2010


On May 8, 2010, at 7:54 PM, Dyno Tor wrote:

> On Sat, May 8, 2010 at 9:03 AM, John Case <case at sdf.lonestar.org>  
> wrote:
>>
>> Let's say you run a tor relay with no exit policy:
>>
>> reject *:*
>>
>> And then later you alter that exit policy a bit:
>>
>> accept *:80,reject *:*
>>
>> My understanding is that this system will continue to be used as a  
>> non-exit
>> relay, but will then also be used as an exit.  That is, it's not  
>> going to be
>> monopolized by exit traffic only ... it will do both, right ?
>
> I don't believe this is correct.  I think this means you're not an
> exit node at all.

What do you mean, not an exit node at all? As long as the Tor
process receives a HUP signal or is restarted to notify it of the
config changes, it will become an exit.

> I suspect if you want your node to be an internal relay or have a
> chance at being a guard and still relay some exit traffic, you'll have
> more luck by running two tor instances, which could be on the same
> box.  Put them in the same family (although I suppose tor will be
> smart enough to keep them from being used on the same circuit anyway,
> since they'll be on the same IP.)  Then you can adjust the bandwidth
> for each instance to be the split you want.

This is totally incorrect. Tor uses exit nodes in the middle and  
possibly
even guard position, depending on flags and general scarcity of
guards.

> If you're willing to be an exit node, however, you'll help the tor
> network out most by doing 100% exit traffic.  That's because we're
> currently constrained at the exits.  Also consider letting port 443
> through too.  I do ports 80 and 443, and I haven't gotten an abuse
> complaint yet.

It is not possible to become a node that acts _only_ as exit.

Sebastian
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