Re: [tor-relays] Filtering TOR Non-exit Relay - Just Curious

[Nelson <nelson@xxxxxxxxxxxxxxxx>]

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In addition, there's a host of possibilities (both good and bad) by
being able to control a Tor relays traffic. I could be wrong, my
previous findings may seem to indicate that anyone with the ability to
strategically place a good number of middle and exits nodes can shape
or at least control some of the Tor traffic.

ZW mentioned previously: "Tor is still using IP, so there is no way
around the fact that a relay operator can observe the IP addresses of
hosts in direct communication with their relay(s).", and this to me
presents a problem in maintaining complete anonymity.


On 10/28/2013 8:09 AM, Nelson wrote:
> Hello!
> 
> Konrad, initially and completely unrelated to Tor, I was working on
> adding some blocklists to my firewall when I came upon and old 
> program, Peerblock. Peerblock from what I remember can log all 
> allowed and blocked traffic, and gives one the ability to use 
> already made blocklists or create new ones. Peerblock has some 
> interesting blocklists and I thought maybe I could use some of 
> those blocklists or some of the listed IP's to filter warez, P2P 
> and other undesirable sites.
> 
> Tor (middle) Relays don't have the filtering options like Exit 
> Relays. With Exit Relays one can choose the type of traffic based 
> on personal and legal reasons, then I thought why don't middle 
> relays at least have some mechanism to block undesirable traffic?
> 
> So I installed Peerblock on one of my Windows PC's that has a Tor 
> Relay (HelloChilli). Initially Peerblock was set to allow all 
> traffic and to my surprise I could see what seemed to be Tor 
> traffic being logged. Then I activated some blocklists and sure 
> enough I was apparently able to block traffic from undesirable 
> sources. Further, I can right click, copy to clipboard the ip 
> addresses of the blocked ip's, do an NSLOOKUP  and generally 
> discern whether the ip address is from a listed Tor relay, a VPN 
> service, from Anti-P2P, Gov or other sources.
> 
> My initial curiosity about viewing real-time Tor traffic and the 
> ability to block specific traffic on my middle-node seemed to be 
> achieved.
> 
> --Nelson
> 

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