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1 botnet OP25B? IW
2 ? DHA WWW PC IW DHA? User Unknown DATA? IW
3 IW ML User Unknown User Unknown tempfail User Unknown MX IW
4 ? SMTP SMTP Sendmail Milter ISP User unknown IW (MX) (POP/IMAP) (Submission) Internet User Unknown Sendmail Flow-Control Filter IW
5 RBL IP? RBL? bot IP IP ISP IW ISP OP25B 2005 port25 bot PC ISP port 587 ISP bot ISP... ISP ISP bot IW
6 ISP OP25B bot Outbound port 25 Blocking Internet POP/SSL IMAP/TLS (POP/IMAP) (Submission) SMTP AUTH/TLS Message Submission IW zombie PC MX Server Internet POP/SSL IMAP/TLS (POP/IMAP) (Submission SMTP AUTH/TLS Message Submission IW
7 SMTP MUA YES? APOP IW POP before SMTP bot POP before SMTP POP IW
8 POP before SMTP POP before SMTP IP FWPROXY? SMTP AUTH IW APOP APOP? POPChallenge/Response MUA APOP?? IW
9 SMTP POP before SMTP bot POP before SMTP SMTP OP25B Message Submission SMTP bot SMTP IW Message Submission RFC2476 MSA Message Submission Agent MTA Relayspam SMTP local Submission port 587 sendmail-8.11 default MSA MSP MessageSubmissionProgram/ IW
10 Message Submission RFC2476 Auth User by RFC2476 MSA port 587 MTA port 25 local user IW SMTP Authentication RFC2554 SASL RFC2222 Relay sendmail-8.13 cyrus SASL SASLsendmail /usr/local/lib/sasl/sendmail.conf /etc/sasldb.dbsaslpasswd sendmail.cf Relay SMTP/TLS PLAIN LOGIN Outl**k IW
11 SMTP Authentication RFC2554 Auth User by RFC2554 MTA port 25 local user IW POP/SSL(Port995) IMAP/TLS(Port 443) SMTP/TLS(Port 25,587) SSL/TLS IW
12 POP/SSL SSL Secure Socket Layer POP MUAPOP qpoppertls POP OpenSSL IW SMTP/TLS TLS Transport Layer Security SSL SMTP sendmailtlssmtp OpenSSL IW
13 TLS SSL CA... TLS SMTP AUTH IW POP/SSL,SMTP/TLS (MX) MUA POP,Submission Internet (POP/IMAP) (GW) IW
14 PC bot bot OS SSL WWW SSH MUA IW MUA PCProxy POP/SSL SMTP/TLS MUA IW
15 POP/SSL POP/SSL (MX) (POP/IMAP) port 110 port 995 Internet (Submission) port 25 port 587 MUA 110 IW (MX) GW Internet (POP/IMAP) port 110 port (Submission) port 25/SMTP AUTH port 587/SMTP AUTH GW MUA IW
16 2 (MX) GW SMTP/TLS Internet (POP/IMAP) port 110 port GW (Submission) port 25/SMTP AUTH GW port 587/SMTP AUTH MUA IW (MX) GW? Internet (POP/IMAP) port 110 port 995 GW 110 (Submission) port 25/SMTP AUTH port 587/SMTP AUTH GW MUA IW
17 (MX) GW MX Submission Internet (POP/IMAP) port 110 port 995 GW 110 (Submission) port 25/SMTP AUTH port 587/SMTP AUTH GW MUA IW (MX) (POP/IMAP) MTA Internet port 110 port (Submission) port 25/SMTP AUTH port 587/SMTP AUTH MUA IW
18 ??? User Unknown bot IW botnet PC SMTP proxy PC PC IW
19 Excel Word PowerPoint Office JPEG HTML IW wav (nimda).pif(sircam).scr(bugbear) HTTP JavaScript update Windows update! IW
20 MIME-multipart? nimda Content-Type DoS... IW WWWIDS Windows security-update IW
21 ? MUA IP bot OS IW MAILBOX NAMES FOR COMMON SERVICES, ROLES AND FUNCTIONS RFC2142 DNS IW
22 sendmail RFC2142 IW DSN Delivery Status Notification) Envelope From null address <> RFC1893 Status Code RFC2821 Status: X.X Permanent Failure X.1.1 Bad destination mailbox address IW
23 status code RFC sendmail Postfix SIMS MTA MTA... IW spam IW
24 RDDoS envelope-from 1stMX 1stMX DNS TTL 2ndMX RDDoSDNS 2ndMX DNS cache 1stMX DNS cache JANOG12 RDDoS Reflected Distributed Denial of Service IW DoubleBounce sender null-address DoubleBounce Default Postmaster envelope-from spam DoubleBounce OFF IW
25 spam SMTP Authentication RFC2554 Message Submission RFC2476 SMTP over TLS RFC2487 DHA who/members WWW IW ISP... MIME-multipart spool IW
26 2 spam bot bot bot US bot spam CAN-SPAM? US spam IW ISP spam ON/OFF ISP SMTP AUTH TLS OP25B IW
27 4 bot bot PC? SPF spammer SPF OP25B ISP SMTP ISP? IW ISP port 25! IP port 25 ISP bot Phishing spam bot IW
28 6 / IP Linux Windows! bot telnet FTP samba reboot OFF IW ISP OP25B/IP25B ON/OFF ON/OFF IW
29 ISP? IW bombing spambombing ML Confirm IW
30 2 Phishing WWW ID SSL? IW spam 1 RBL Realtime Blackhole List SBL Spam Blocking List spam DNS MTAIP botnet bot ISP ON/OFF IW
31 spam 2 SPAMLIST access_db envelope from IP POP before SMTP ISP POPSMTP qpopper IP bot IW spam 3 Sender Base spam reputation IP IP RBL bot IP? Bonded Sender Program? IW
32 spam 4 spam spam OK spam spam MUA IW spam 5 IW
33 spam 6 From Subject To Received Content-Type? IW spam 7 URL spam URL URL userinfo query IW
34 spam 8 d-sig DB spam d-sig MIME multipart d-sig partspam spam IW spam 9 Channelled Address spam US AT&T WebMail Zo IW
35 spam 10 ML IW spam 11 tempfail BruteForce spam IP IP SMTP Sendmail IP User Unknown IW
36 Phishing 1 SPF AOL / DNS SMTP Sender example.jp. IN TXT "v=spf1 ip4: /22 ip4: /27 mx a:accele.ope.example.jp a:sv04.example.jp a:jasmine.example.jp include:example.com -all" IW Phishing 2 Sender-ID MS Caller-ID + SPF SPF Caller-ID MS Microsoft Sender-ID sid-filter IW
37 Phishing 3 DKIM Yahoo! DomainKeys + CISCO Identified Mail DNS DNS Yahoo!,Google Gmail,Sendmail dk-milter SourceForge.net IW spam 1 Phishing Phishing? MUA POP IMAP ISP spam ON/OFF spammer IW
38 spam 2 spam Word-Salad bot PC WWW spam bot spam IW spam 3? User Unknown User Unknown spam... IW
39 spam 4 SMTP AUTH Sender Sender SMTP sender RDDoS OP25B IP IW spam 5 URL 2004URL Phishing MUA IW
40 URL spam URL IW spam 6 JPEG bot 2004 HTML JPEG OS MUA spam bot spam IW
41 Spam 7 Security Focus BrightMail DeerSoft SpamAssassin Apache SpamAssassin Project Opensource spam spam... IW SMTP opt-out DHA Subject / IW
42 ISP Cloudmark Sendmail,Openwave,OCN,Biglobe,So-net, Web... DNA IW ISP OP25B Message Submission/SMTP AUTH OP25B POP before SMTP spam... IW
43 1 DHA DoS / / ON/OFF ISP IW DHA/DoS User Unknown // User Unknown DB tempfail tempfail IW
44 3 / ISP IW DoS / Queueing POP/IMAP IW
45 5 CSV? GUI? IW devtools/site/siteconfig.m4 IW
46 VERSIONID(`$Id: config.mc,v /12/05 12:27:36 ando Exp ando $') OSTYPE(bsd4.4)dnl DOMAIN(generic)dnl MASQUERADE_AS(`example.jp')dnl MASQUERADE_DOMAIN(`accele.example.jp')dnl FEATURE(`limited_masquerade')dnl FEATURE(`masquerade_envelope')dnl EXPOSED_USER(`root postmaster')dnl FEATURE(`mailertable')dnl FEATURE(`nocanonify')dnl FEATURE(`access_db')dnl FEATURE(`blacklist_recipients')dnl FEATURE(`accept_unresolvable_domains')dnl FEATURE(`no_default_msa')dnl MODIFY_MAILER_FLAGS(`LOCAL', `+S') MAILER(local)dnl MAILER(smtp)dnl Dmexample.jp Dwaccele define(`confdomain_name',`$w.$m')dnl define(`confto_ident',`0s')dnl define(`confcf_version', `IW2006 Sample')dnl define(`confmax_queue_children', `100')dnl define(`confmin_queue_age', `1m')dnl define(`confauth_mechanism',`[login PLAIN DIGEST-MD5 CRAM-MD5]')dnl TRUST_AUTH_MECH(`LOGIN PLAIN CRAM-MD5 DIGEST-MD5') dnl INPUT_MAIL_FILTER(`sid-filter', INPUT_MAIL_FILTER(`dk-filter', define(`confcacert_path', `/etc/ssl/ca/certs/') define(`confcacert', `/etc/ssl/ca/ca.crt') define(`confserver_cert', `/etc/ssl/ca/certs/server-ca.crt') define(`confserver_key', `/etc/ssl/ca/private/server.key') IW
Contents 2008/5/20 5 2 2008/5/20 5 3 2 (FN: false negative) (FP: false positive) 2008/5/20 5 4 Spam DoS 2008/5/20 5 5 (1) IP From IP / Tempfailing 2008/5/20 5 6 (2) IP IP or 2008/5/20 5 7 (3) IP PTR MTA
( )
( ) kazu@iij.ad.jp 2 example.jp 投稿 ユーザ認証 配送 ドメイン認証 alice @ example.jp ISP/ASP ISP/ASP? ISP A ISP B ASP C (bot) ISP A ISP B 配送 配送 ASP C 配送 配送 = ( ) = ( ) Submission SMTP ISP A ISP B 投稿 ユーザ認証 配送 ASP C
antiabuse.gby
( ) kazu@iij.ad.jp 1 Bot Outbound port blocking (OPB) OPB DKIM SPF SPF SPF 3 004 10 Bot ISP/ASP Bot ( ) 4 Bot ( ) PC Bot ( ) Robot Bot ランダムポート PC PC Bot Windows IP 4 SMTP 6 Bot p j @ a Outbound port blocking
guide.PDF
ExpressMail Ver2.0 Copyright ( ) 1998/12/25 REV.1 1 ExpressMail Ver2.0 ExpressMail Ver2.0 ExpressMail Ver2.0 WindowsNT SMTP/POP3/IMAP4 (1) SMTP sendmail 8.8.5 DLL (2) POP3 RFC1939 APOP (3) IMAP4 RFC2060
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2005/12/6 Internet Week 2005 Contents (spam ) Spam Spammer Spam Spam Spam InternetWeek 2005 Copyright 2005 by Nariyoshi YAMAI 2 1 (spam ) (phishing) InternetWeek 2005 Copyright 2005 by Nariyoshi YAMAI
はじめに
23 1.1 1.2 1.2.1 1.2.2 24 26 26 26 29 31 33 34 1.3 36 1.3.1 1.3.2 1.3.3 1.3.4 EXPN/VRFY 36 VRFY EXPN 36 37 38 38 45 46 46 DoS 51 Flood DoS 51 7 51 52 DDoS 53 1.4 58 1.4.1 1.4.2 1.4.3 1.4.4 1.4.5 1.4.6
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JEAG Recommendation (Outbound Port Blockin) 3 Japan Email Anti-Abuse Group 1. JEAG Recommendation JEAG Recommendation http://jea.jp/ 2. JEAG Recommendation JEAG RecommendationJEAG 3. JEAG Recommendation
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[ ] 2011.03.08 Internet Ini(a(ve Japan Inc. (IIJ) Shuji SAKURABA ( ) 1 Agenda JEAG 2 - I IIJ 2008.06.02 2011.01.02 (135 ) See Also: Internet Infrastructure Review McColo 3 - II 2010.09.27 2011.01.02 (14
Agenda
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ITKeeper/NETBegin BB パックホスティングサービス 2012 1 30 1. 2. 3. 2008 5 19 2012 1 30 1.5 5-29-3 2 3 135-0016 :0120-060-799 http://itkeeper.ricoh.co.jp/isp/ Copyright RICOH TECHNOSYSTEMS CO., Ltd. All rights reserved.
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Internet Week 99 Internet Week 99 1999 Naoaki Watanabe,Japan Network Information Center 1... 1 2... 1 3... 2 4... 5 5... 7 6 IMAP4... 10 7 S/MIME PGP... 14 8... 18 9... 19 IMAP4 Happy99 OutLook Exchange
このチュートリアルの 構 成! DNSの 重 要 性! メールの 基 礎 知 識! 普 段 目 にするメールについての 解 説! メール 配 送 のモデル! MX 配 送 static 配 送 の 使 い 分 け! 設 定 のまとめ! spamの 現 状 と 対 策! spam 絶 滅 作 戦 IW
メールシステムの 現 状 ~ 迷 惑 メールを 受 けない 投 げないために~ 安 藤 一 憲 ando@ppml.tv このチュートリアルの 構 成! DNSの 重 要 性! メールの 基 礎 知 識! 普 段 目 にするメールについての 解 説! メール 配 送 のモデル! MX 配 送 static 配 送 の 使 い 分 け! 設 定 のまとめ! spamの 現 状 と 対 策! spam
atama.dvi
1 1 1 2 1.1..................................... 2 1.2 WWW....................................... 3 1.3......................................... 3 1.4................................... 3 1.5..............................
1. 2. ( ) Secure Secure Shell ssh 5. (xinetd TCP wrappers) 6. (IPsec) 7. Firewall 2
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2002 CAVIN SR 2002/10/12-14 2 2002/10/12-14 3 http://www.npa npa.go..go.jp/police_j.htm 2002/10/12-14 4 1 2 3 4 5 6 7 2002/10/12-14 5 2002/10/12-14 6 2002/10/12-14 7 1 2 3 4 5 6 7 2002/10/12-14 8 IT IT
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200 7 19 JPCERT [2007 2 4 6 ] IPA JPCERT JPCERT/CC 2007 2 4 6 1 2 1. 2007 2 1 2007 4 1 6 30 IPA 46 95 141 2004 7 8 501 940 1,441 3 2 (1) 3 2004 7 8 1 2007 2 1.98 1 2005/1Q 2005/2Q 2005/3Q 2005/4Q 2006/1Q
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CAVIN SR 2002 2002/10/12-14 2 http://www.npa npa.go..go.jp/police_j.htm 2002/10/12-14 3 2002/10/12-14 4 1 2 3 4 5 6 7 2002/10/12-14 5 2002/10/12-14 6 1 1 2 3 4 5 6 7 2002/10/12-14 7 2002/10/12-14 8 IT
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2001001217-2.PDF
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