squid 를 사용한다고 해서 제 서버가 스팸서버가 될 수 있을까요
얼마전 KIDC 에서 한통의 메일을 받았습니다. 메일내용은 아래와 같습니다.
안녕하십니까? KIDC입니다.
고객님의 사업이 나날히 번창하시기를 기원합니다.다름이 아니오라 KIDC에서는 고객님의 장비를 통해 발송된 스팸메일 관련 신고가 해외로부터 있을 경우 고객님께 발생될 수 있는 불이익을 사전에 차단할 수 있도록 해당 사항에 관한 자세한 통보를 해 드리고 있습니다.
고객님의 해당 IP 장비에 대한 스팸메일 신고가 있었던 것은 다음의 두 가지 원인 중 하나 때문입니다.
(1) 해당IP의 장비를 통해 직접 메일이 발송되었거나,
(2) 해당 IP의 장비와는 상관이 없지만, 메일 내용 중에 해당 IP의 장비에 관련된 링크가 있을 경우입니다.
아울러 KIDC에서는 불필요한 스팸메일 관련 국제분쟁과 해외에서 IP가 블록킹 됨으로써 발생할 수 있는 여러가지 불이익을 방지하기 위해 고객님께 다음과 같은 사항을 준수해 주실 것을 부탁드립니다.
(1) 고객님이 불특정 다수에게 메일(상업, 비상업적 메일)을 발송할 경우에는 메일주소의 끝이 .kr로 끝나는 주소와, 대형 포탈사이트의 이메일 계정만을 대상으로 메일 발송을 하여 주시기 바랍니다.
(2) 고객님께서 서버호스팅, 웹 호스팅 사업을 하시는 경우에는 해당 고객 여러분들께도 이러한 내용을 적극 통보해 주시기 바랍니다.아래에 외부에서 접수된 신고메일 원본을 보내 드립니다. [헤더부분]은 회색으로, [문제가 된 IP]는 붉은색으로 표시하였습니다. 신고메일 원본의 내용을 확인하시고 위에 기술된 내용대로 처리해 주시기를 부탁 드립니다.
마지막으로 위 내용과 관련하여 궁금하신 사항이 있으실 경우에는 xxxxxx@kidc.net (02-xxxx-xxxx)으로 연락 주시면 최대한 신속한 답변을 드리겠습니다. 메일을 보내실 경우에는 제목란에 KCP번호를 붙여서 보내주시기 바랍니다. 감사합니다.
라고 하고 대략 아래의 내용이 왔더군요..
Hello,We believe the following mail is spam that originated or was relayed through your domain.
We would appreciate hearing what actions you have undertaken or plan to undertake with respect to this situation. Feel free to let us know if you believe that the e-mail in question is not in fact spam.
Sincerely,
Scott Reid
Security & Abuse Dept.
Juno Online Services, Inc.---------------------------------------------
Juno and NetZero are now United Online.
---------------------------------------------From:X
To: contact-wizard@support.juno.com
Date: Fri, 3 Oct 2003 12:32:09 -0700
Subject: Juno 5.27 : Wizard Submission : Spam Complaint --> Ref # [1M2yhD7Gj01pUpo]This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.----__JNP_000_071d.5b66.713f
Content-Type: text/plain; charset=us-asciisolicitations that are unwanted!!!!
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Content-Type: message/rfc822Return-Path: <lwi6585dj2q@guohao.com>
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From: "Virgie Abernathy" <lwi6585dj2q@guohao.com>
Reply-To: "Virgie Abernathy" <lwi6585dj2q@guohao.com>
To: <shirleysong@juno.com>, <shirly11@juno.com>, <shisha5@juno.com>, <shiz0ck@juno.com>, <shk3412@juno.com>, <shmel123@juno.com>, <X>, <shmulin@juno.com>, <shnuggy1@juno.com>, <sho-offgraphics@juno.com>, <shocktopus@juno.com>
Subject: MedDietPatch loyal
Date: Sat, 04 Oct 03 06:20:50 GMT
X-Mailer: QUALCOMM Windows Eudora Version 5.1
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function ValidateForm()
{document.sendit.action =3D "mailto:" + document.sendit.txtEmail.value + "?=
subject=3DThought You Would Like to See This&body=3Dhttp://www.patch-direc=
t.com/index.php?RepID=3DDUN4"
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<table width=3D393 border=3D0 cellspacing=3D0 cellpadding=3D0 bgcolor=3D#c=
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<div align=3Dcenter><font face=3DArial size=3D4 color=3D#FFFFFF><b>NEVER
"DIET" AGAIN</font></b></font></div>
</td>
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</table>
<table width=3D400 border=3D0 cellspacing=3D0 cellpadding=3D0 height=3D53>=<tr>
<td height =3D28 valign=3Dtop>
<p align=3Dcenter><font face=3DArial size=3D4 color=3D#cc0000><br>
It"s Not A Diet - It"s A Patch!</b></font></p>
<p><b><font face=3DArial size=3D2 color=3D#333333>Put the patch on in the =
morning and forget
all about dieting. You can <!-- steed -->eat what
you want, but you"ll be fully satisfied
very qu<!-- sock -->ickly. You won"t feel stuffed or
anything like that, in fact<!-- candela --> you"ll feel
great<!-- edible -->... you just won"t want any more food.
Think what it will be like<!-- nebulous --> not craving food
anymore! The Pounds-Awa<!-- equine -->y-Patch=FFFFFF99 is the most
incredible weight loss produ<!-- axial -->ct you will ever
use... even if you<!-- manufacture --> try them all...</font></b><font si=
ze=3D2 face=3DArial color=3D#333333><a href=3D"http://www.patch-direct.com=
/index.php?RepID=3DDUN4">more
information</a><br>
<br>
</font></p>
</td>
</tr>
</table>
</div>
</td>
<td width=3D210 align=3Dcenter><a href=3D"http://www.patch-direct.com/inde=
x.php?RepID=3DDUN4"><IMG SRC=3Dcid:patch3.jpg ALT=3DLose Weight The Easy W=
ay!! border=3D0></a></td>
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<div align=3Dcenter><font face=3DArial size=3D4 color=3D#FFFFFF><b>
The N<!-- emperor -->ext Generat<!-- gorgon -->ion in Wei<!-- =
g rave -->ght Lo<!-- koinonia -->ss is here!</font></b></font></=
div>
</td>
</tr>
</table>
</div>
<table width=3D550 border=3D0 cellspacing=3D0 cellpadding=3D10 height=3D36=
1 align=3Dcenter bgcolor=3D#FFFFCC>
<tr>
<td height=3D308 width=3D544>
<font size=3D2 face=3DArial color=3D#CC0000>
A major medical breakthrough has shattered the
weight-loss barrier and a new generation, non
"diet," fast-acting weight<!-- cantilever -->-loss trans-dermal
patch has been born - an entirely new gene<!-- cress -->ration
of powerful, foolproof, bio-ac<!-- crook -->tive weight-loss
compounds that hav<!-- dunbar -->e literally eliminated calorie
counting, eliminat<!-- briefcase -->ed strenuous exercise,
eliminated fad diets, supermarket "mira<!-- colby -->cle"
pills, so<!-- tuesday -->-called Japanese "fat-blockers,"
electric belts, or anything el<!-- handmade -->se you have ever
tried.
<p>
But most importantly, this new generation of
potent compounds has elimin<!-- inner -->ated any possibility
of failure and replaced it with guaranteed
success. You will not fail this time. In fact,
you cannot fail this time because you don"t have
to do anything more than remember to put on your
patch each morning. That"s i<!-- pianissimo -->t! There is nothing
else to do and nothing else to buy. The
Pounds-<!-- oldsmobile -->Away-Patch=FFFFFF99 will do everything for you
-
automatically. And that"s guaranteed.
<p>
Men and women w<!-- finery -->ho have used the Pounds-Away-Patch
all report virtually identi<!-- fanfold -->cal results: When you
use the patch you don"t over eat - you just don"t
want to. You have plenty <!-- fidget -->of energy, and you feel
great. As of now, the obesity experts concur on
three main points: 1) The P<!-- bema -->ounds-Away-Patch=FFFFFF99
naturally suppresses your appetite, 2) The
Pound<!-- decorous -->s-Away-Patch=FFFFFF99 reduces<!-- administer
--> the=
time to perceived
fullness, and 3) Using The Pounds-Away-Patch=FFFFFF99
results in significant weight loss.
<p><center><font face=3DArial size=3D4 color=3D#333333><a href=3D"http://w=
ww.patch-direct.com/index.php?RepID=3DDUN4">Cli<!-- hatteras -->ck
to f<!-- parentage -->ind out m<!-- woodwork -->ore!</a></font></p=
>
</div>
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위의 빨간 아이피가 제가 관리하는 서버였는데요..
해당 서버는 telnet 과 ssh 이외에 아무것도 서비스하지 않고있는 서버였습니다.
물론 nmap 및 netstat 및 해킹유무에 대해서 모두 체크해 보았으나 완전히 정상이었구요..tripwire 로그도 정상이었습니다. 물론 시스템로그들도 모두 정상이었구요..
무엇보다도 현재는 아무런 사용도 하고 있지 않는 서버였습니다.
그러다가 며칠전에 squid 를 테스트용으로 설치하고 암생각없이 며칠두었었는데요..
squid 를 서비스한다고 스팸메일을 저희 아이피로 발송할 수가 있을까요?
아니면 아주 우연찮게 이 서버와 관련없이 언놈이 저렇게 보낸건가요?
고수분들의 고견을 부탁드립니다.
Re: squid 를 사용한다고 해서 제 서버가 스팸서버가 될 수 있을
여기서 사용하는 서버의 IP가 붉은색 글씨 말고 64.136.28.83인가요?
만약 그렇다면 정말 릴레이에 사용된 것이고, 아니면 잠시 착각을 일으킬
만한 것 같네요. 도메인이 없는 IP로 릴레이시켰다면 릴레이 서버 IP는
64.136.28.83 이 되어야 맞을 것 같습니다. 괄호 안을 믿으실 필요는
없을것 같네요. 그건 도메인 또는 그 IP를 쓰는 것으로 임의로 조작될
수도 있습니다.
메일은 112.253.174.250 -> 64.136.28.83 -> 10.130.24.69
으로 전달되었다고 보는 것이 타당할 것으로 봅니다. 그중에 사용하시는
IP가 끼어 있는지 보세요.
--
익스펙토 페트로눔
squid 사이트에도 spam relay 로 악용당할수 있다고 되어 있군
squid 사이트에도 spam relay 로 악용당할수 있다고 되어 있군요.
http://www.squid-cache.org/Doc/FAQ/FAQ-25.html#ss25.2
trusted ports 를 정의하고, 여기에 25(smtp) 는 포함시키지 말라고 하네요.
ex) squid.conf
http_access deny !Safe_ports
acl Safe_ports port 80 # http
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