Re: [tor-relays] Faravahar messing with my IP address

[s7r <s7r@xxxxxxxxxx>]

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Hello,

Unfortunately this is not the first time we see this, and it did
happen before Faravahar IP address change and before it was
experiencing very high latency (
https://trac.torproject.org/projects/tor/ticket/17338 ).

See:
https://trac.torproject.org/projects/tor/ticket/16205#comment:3
 ~5 months ago

Maybe the bogus discovery of IP address change explains this also:
https://trac.torproject.org/projects/tor/ticket/15500

There is obviously something strange going on. In addition to what
teor said, the operator should also find out exactly what kind of
anti-DoS protection system is used in that datacenter. Maybe something
upstream feels attacked when Faravahar is receiving a lot of incoming
connections and behaves in a way that is incompatible with Tor.

On 10/23/2015 1:55 PM, teor wrote:
> 
> On 23 Oct 2015, at 09:30, Green Dream <greendream848@xxxxxxxxx 
> <mailto:greendream848@xxxxxxxxx>> wrote:
> 
>> I see this from time to time as well. Here's another example:
>> 
>> Oct 17 23:02:44.000 [notice] Our IP Address has changed from 
>> 52.64.142.121 to [CORRECT IP]; rebuilding descriptor (source: 
>> 86.59.21.38).
>> 
>> 52.64.142.121 appears to be an instance on Amazon's EC2. I don't
>> run any nodes on EC2. 86.59.21.38 resolves to tor.noreply.org 
>> <http://tor.noreply.org>.
>> 
>> I'm unable to find any occurrences of this happening from
>> Faravahar, however the issue seems to be fairly common. What's
>> going on?
> 
> We've had one suggestion so far: That the iptables forwarding rule
> from Faravahar's old address might not be preserving the original
> source address.
> 
> Another possibility is that authorities running directory caching 
> proxies are re-using the X-Your-IP-Address-Is header meant for
> other clients, rather than generating it fresh for every client.
> 
> A third possibility is a bug in the tor authority code, which sets 
> X-Your-IP-Address-Is to the wrong IP.
> 
> Tim
> 
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