[tor-relays] Updating our IP Address

[tor-relay.dirk at o.banes.ch]

Hello,

I'm part of the abuse team of the mentioned Tor Exit.
Also I follow this mailing list.

I read you post several times but I'm not sure what you where doing.
It looks to me like you running a tor node and have also a dyndns update
process running.

Is this correct ? Please provide some more information about you use
case/configuration

best regards

Dirk


On 20.12.2016 15:25, diffusae wrote:
> Hi!
>
> Yesterday I encountered a strange IP address update via DynDNS:
>
> Dec 19 23:00:32.000 [notice] Your IP address seems to have changed to
> 176.10.104.240 (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating.
> Dec 19 23:00:32.000 [notice] Our IP Address has changed from xx.xx.xx.xx
> to 176.10.104.240; rebuilding descriptor (source: METHOD=RESOLVED
> HOSTNAME=my.dyndns.cc).
> Dec 19 23:00:36.000 [notice] Self-testing indicates your ORPort is
> reachable from the outside. Excellent.
> Dec 19 23:04:32.000 [notice] Your IP address seems to have changed to
> xx.xx.xx.xx (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating.
> Dec 19 23:04:32.000 [notice] Our IP Address has changed from
> 176.10.104.240 to xx.xx.xx.xx ; rebuilding descriptor (source:
> METHOD=RESOLVED HOSTNAME=my.dyndns.cc).
> Dec 19 23:04:34.000 [notice] Self-testing indicates your ORPort is
> reachable from the outside. Excellent.
> Dec 19 23:08:32.000 [notice] Your IP address seems to have changed to
> 176.10.104.240 (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating.
> Dec 19 23:08:32.000 [notice] Our IP Address has changed from xx.xx.xx.xx
> to 176.10.104.240; rebuilding descriptor (source: METHOD=RESOLVED
> HOSTNAME=my.dyndns.cc).
> Dec 19 23:08:34.000 [notice] Self-testing indicates your ORPort is
> reachable from the outside. Excellent.
> Dec 19 23:13:32.000 [notice] Your IP address seems to have changed to
> xx.xx.xx.xx (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating.
> Dec 19 23:13:32.000 [notice] Our IP Address has changed from
> 176.10.104.240 to xx.xx.xx.xx; rebuilding descriptor (source:
> METHOD=RESOLVED HOSTNAME=my.dyndns.cc).
> Dec 19 23:13:36.000 [notice] Self-testing indicates your ORPort is
> reachable from the outside. Excellent.
> Dec 19 23:22:38.000 [notice] Self-testing indicates your DirPort is
> reachable from the outside. Excellent. Publishing server descriptor
>
> The DynDNS client updates the IP every five minutes. It looks like
> somebody has tried to changed / update the IP manually or via spoofed
> update (DNS) entry. I also recognized the change at the WebGUI of the
> DynDNS Provider. The changed IP address is an exit node
> (0111BA9B604669E636FFD5B503F382A4B7AD6E80) in Switzerland.
>
> I don't think, that this is a bug in Tor 0.2.9.7-rc. Are there any
> possible attacks to Tor relays, if they are using a faked IP address?
> Normally this shouldn't work. Even if the traffic is redirected to an
> exit node, but I am not sure.
>
> Well, it should be safer to use autodetection of the IP though Tor.
>
> Regards,
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