Hello all, I follow the guide for avoiding abuse notices, and generally I only get 1/year of the DMCA variety. However, I recently received this complaint, which appears to show spam originating from my Tor server (209.188.113.101 / tor-proxy.anfani.com). As far as I know, port 25 is blocked on my exit policy. Port 587 is allowed. I do have a mail server running on this machine, but it does not accept outside connections.
Is there something I am missing? Is there anything else I should do to prevent this in the future? Could there be some way that a Tor user could locally send mail using my server?
Thanks, --Brock
-------- Original Message -------- Subject: RES: Fwd: Olá Date: Thu, 13 Dec 2012 14:41:22 +0000 (UTC) From: abuse@terra.com.br To: Luis Barzon barzon@terra.com.br CC: network-abuse@cc.yahoo-inc.com, brock@anfani.com
Prezado Usuário,
O Departamento de Abuse do Terra trabalha seriamente para proteger seus assinantes contra abusos cometidos por terceiros. Nosso objetivo é proporcionar segurança aos nossos Clientes, evitando e impedindo o mau uso da Internet, através dos servidores Terra.
Em relação a sua reclamação, informamos que após análise, identificamos que o responsável não pertence ao Terra.Nesses casos identificamos o administrador e encaminhamos a incidência para a devida tratativa.
Salientamos que as devidas ações corretivas passam a ser de responsabilidade do administrador da rede identificada.
Para o seu conhecimento, o endereço de contato que encaminhamos a incidência é: network-abuse@cc.yahoo-inc.com mailto:network-abuse@cc.yahoo-inc.com, brock@anfani.com mailto:brock@anfani.com
Atenciosamente,
Rafael Doyle Equipe de Segurança Terra - Depto. de Abuse abuse@terra.com.br mailto:abuse@terra.com.br SAN - Servico de Atendimento Nacional Fax: (51) 3287-9087
------------ Mensagem Original ------------
*De:* Luis Barzon [barzon@terra.com.br];abuse@terra.com.br
*Enviada em:* 11/12/2012 15:15:49
*Para:* abuse@terra.com.br
*Assunto:* Fwd: Olá
=?iso-8859-1?Q?
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* -----_Original_Message_----- From:_Fl_Dosi_web02689@att.net To:_undisclosed_recipients:_; Cc:_ Sent:_Ter_11/12/12_08:54 Subject:_Fwd:_Olá
*
Olá Bom_te_conhecer,_Eu_sou_Miss_Flourence,_eu_gostaria_de_tê-lo_como_meu_amigo,_por_favor,_você_poderia_voltar_para_mim_para_mais_detalhes_do_meu_eu,_e_todos_talvez_necessário_em_relação_inclusive_a_minha_imagem,_se_este_interesse_que_você_voltar_para_mim_._seu_Flourence. .................................................................................. Hello Nice_Meeting_You,_i_am_miss_Flourence,_i_wish_to_have_you_as_my_friend,_please_could_you_get_back_to_me_for_more_detail_of_my_self,_and_all_maybe_necessary_in_relationship_including_my_picture,_if_this_interest_you_get_back_to_me.yours_Flourence.
On Thu, Dec 13, 2012 at 08:28:30AM -0700, Brock Tice wrote:
Hello all, I follow the guide for avoiding abuse notices, and generally I only get 1/year of the DMCA variety. However, I recently received this complaint, which appears to show spam originating from my Tor server (209.188.113.101 / tor-proxy.anfani.com). As far as I know, port 25 is blocked on my exit policy. Port 587 is allowed. I do have a mail server running on this machine, but it does not accept outside connections.
Is there something I am missing? Is there anything else I should do to prevent this in the future? Could there be some way that a Tor user could locally send mail using my server?
Thanks, --Brock
received:_from_[10.235.200.97]_by_ochaua.tpn.terra.com_(LMTP);_Tue,_11_Dec_2012_12:26:15_+0000_(UTC) received:_from_nm17-vm0.bullet.mail.gq1.yahoo.com_(nm17-vm0.bullet.mail.gq1.yahoo.com_[98.137.177.224])_by_1j4.tpn.terra.com_(Postfix)_with_ESMTP_id_5A96DC0000DFA_for_waleria.luis@itelefonica.com.br;_Tue,_11_Dec_2012_12:25:02_+0000_(UTC) received:_from_[209.188.113.101]_by_web184904.mail.gq1.yahoo.com_via_HTTP;_Tue,_11_Dec_2012_03:54:56_PST
This looks like webmail -- somebody exited from your relay to port 80 on yahoo's website, and asked yahoo to send the mail. Yahoo sent the mail, and the recipient didn't like it. Fortunately (for the recipient, not for you), yahoo included the IP address of the "user" who asked its website to send the mail.
We might not think of this behavior as 'spam' coming from your relay, but I'm afraid the definition of spam has greatly expanded in the past decade.
--Roger
On Thursday, December 13, 2012 1:46pm, "Roger Dingledine" arma@mit.edu said:
On Thu, Dec 13, 2012 at 08:28:30AM -0700, Brock Tice wrote:
Hello all, I follow the guide for avoiding abuse notices, and generally I only get 1/year of the DMCA variety. However, I recently received this complaint, which appears to show spam originating from my Tor server (209.188.113.101 / tor-proxy.anfani.com). As far as I know, port 25 is blocked on my exit policy. Port 587 is allowed. I do have a mail server running on this machine, but it does not accept outside connections.
Is there something I am missing? Is there anything else I should do to prevent this in the future? Could there be some way that a Tor user could locally send mail using my server?
Thanks, --Brock
received:_from_[10.235.200.97]_by_ochaua.tpn.terra.com_(LMTP);_Tue,_11_Dec_2012_12:26:15_+0000_(UTC) received:_from_nm17-vm0.bullet.mail.gq1.yahoo.com_(nm17-vm0.bullet.mail.gq1.yahoo.com_[98.137.177.224])_by_1j4.tpn.terra.com_(Postfix)_with_ESMTP_id_5A96DC0000DFA_for_waleria.luis@itelefonica.com.br;_Tue,_11_Dec_2012_12:25:02_+0000_(UTC) received:_from_[209.188.113.101]_by_web184904.mail.gq1.yahoo.com_via_HTTP;_Tue,_11_Dec_2012_03:54:56_PST
This looks like webmail -- somebody exited from your relay to port 80 on yahoo's website, and asked yahoo to send the mail. Yahoo sent the mail, and the recipient didn't like it. Fortunately (for the recipient, not for you), yahoo included the IP address of the "user" who asked its website to send the mail.
We might not think of this behavior as 'spam' coming from your relay, but I'm afraid the definition of spam has greatly expanded in the past decade.
I've been burned by this too.
And this is a problem that will only get worse as the trend continues from actual e-mail clients to webmail.
hotmail.com, live.com, webmail.aol.com, mail.google.com, yahoo.com; there are so many unknown IP addresses behind these few webmail domains that it is impractical to block them.
Hi Brock,
On 13.12.2012 16:28, Brock Tice wrote:
Is there something I am missing?
Look closely at the first "Received" header:
received:_from_[209.188.113.101]_by_web184904.mail.gq1.yahoo.com_via_HTTP;_Tue,_11_Dec_2012_03:54:56_PST
This means the spam was sent via Yahoo, and got delivered there from your exit via HTTP (Webmail).
Is there anything else I should do to prevent this in the future?
There's not much you can do about this, unless you want to systematically block all webmail services. :-(
Could there be some way that a Tor user could locally send mail using my server?
It's always good to take a look at the Received headers to rule out that someone has managed to break into your server.
On Fri, 14 Dec 2012 00:12:51 +0100 Moritz Bartl moritz@torservers.net wrote:
Hi Brock,
On 13.12.2012 16:28, Brock Tice wrote:
Is there something I am missing?
Look closely at the first "Received" header:
received:_from_[209.188.113.101]_by_web184904.mail.gq1.yahoo.com_via_HTTP;_Tue,_11_Dec_2012_03:54:56_PST
This means the spam was sent via Yahoo, and got delivered there from your exit via HTTP (Webmail).
Is there anything else I should do to prevent this in the future?
There's not much you can do about this, unless you want to systematically block all webmail services. :-(
Another option is to be more assertive. From Yahoo's point of view, traffic from your Tor exit node is no different than traffic from "anonymous" strangers in, say, an internet café. Does Yahoo really want to block tourists and business people on the go from using its webmail at random locations? Tell the complainant that it makes no sense to take action against you. The proper method of stopping spam from webmail accounts is to immediately freeze the offending account until its holder comes forward.
tor-relays@lists.torproject.org
-
Brock Tice -
k e bera -
Moritz Bartl -
Roger Dingledine -
Steve Snyder