006ﬁÁ‘W2part1_I

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1 Nikkei Linux 85

2 ozenji:/home/sengoku % telnet mx.gcd.org smtp Trying Connected to mx.gcd.org. Escape character is '^]' toyokawa.gcd.org ESMTP 2 HELO ozenji.gcd.org toyokawa.gcd.org 4 MAIL FROM:<postmaster@gcd.org> ok 6 RCPT TO:<sengoku@gcd.org> ok 8 DATA go ahead 10 Subject: test 11 From: postmaster@gcd.org 12 To: sengoku@gcd.org 13 Date: Sat, 01 Jan :01: SMTP # Hiroaki Sengoku<sengoku@gcd.org> ok qp QUIT toyokawa.gcd.org Connection closed by foreign host. 86 Nikkei Linux

3 % nslookup -q=mx gcd.org. Server: toyokawa.gcd.org Address: Aliases: in-addr.arpa gcd.org preference = 10, mail exchanger = mx.gcd.org gcd.org nameserver = ns.gcd.org gcd.org nameserver = brother.daio.net gcd.org nameserver = ns-tk012.ocn.ad.jp mx.gcd.org internet address = ns.gcd.org internet address = brother.daio.net internet address = Nikkei Linux 87

4 MAIL FROM:<" /bin/cat /etc/passwd /usr/ucb/mail RCPT 88 Nikkei Linux

5 Nikkei Linux 89

6 90 Nikkei Linux

7 91 Nikkei Linux sendmail qmail

8 sendmail toyokawa.gcd.org 92 Nikkei Linux

9 .qmail-bar.qmail-default ~ sengoku/.qmail toyokawa.gcd.org gcd.org ~ sengoku/.qmail-foo ~ sengoku/.qmail-bar ~ sengoku/.qmail-default haniwa.com:koala-haniwa.haniwa.com:koala-haniwa maczuka.gcd.org:alias-maczuka.maczuka.gcd.org:alias-maczuka.qmail-haniwa-koala.qmail-haniwa-hanicom.qmail-haniwa-default.qmail.qmail-foo Nikkei Linux 93

10 ~ koala/.qmail-haniwa-koala hanicom@haniwa.com ~ koala/.qmail-haniwa-hanicom &admin1 &admin2 &admin3 haniwa.com ~ koala/.qmail-haniwa-default preline -d /usr/bin/uux - -r -gb -z maczuka!rmail "($EXT2@$HOST)" postmaster@gcd.org alias/.qmail-postmaster root@gcd.org alias/.qmail-root alias/.qmail-default gcd.org.gcd.org haniwa.com.haniwa.com &sengoku 94 Nikkei Linux

11 qmail-smtpdsmtpqmailsmtpd # relayclients :allow,RELAYCLIENT="" :allow,RELAYCLIENT="" :allow,RELAYCLIENT="" # :allow :deny tcpserver -x/var/qmail/control/tcprules.dat \ :allow toyokawa.gcd.org smtp \ /var/qmail/bin/qmail-smtpd & IP Nikkei Linux 95

12 () (toyokawa.gcd.org IP) IP bin/tcprules control/tcprules.dat \ control/tcprules.tmp < control/tcprules.txt tcpserver -x/var/qmail/control/tcprules.dat \ toyokawa.gcd.org smtp \ /var/qmail/bin/rblsmtpd \ /var/qmail/bin/qmail-smtpd & 96 Nikkei Linux

13 Nikkei Linux 97

14 98 Nikkei Linux

15 : /bin/tcpserver -x/var/qmail/control/tcprules.dat \ /var/qmail/bin/qmail-start./mailbox \ splogger qmail toyokawa.gcd.org \ /var/qmail/bin/rblsmtpd \ /var/qmail/bin/qmail-smtpd & /usr/sbin/sendmail /usr/sbin/sendmail.daemon /usr/sbin/sendmail /usr/sbin/sendmail.daemon /bin/tcpserver toyokawa.gcd.org \ /var/qmail/bin/qmail-popup toyokawa.gcd.org \ /bin/checkpassword \ /var/qmail/bin/qmail-pop3d Maildir & qmailsendmail /usr/sbin/sendmail ln -s /var/qmail/bin/sendmail \ /usr/sbin/sendmail Nikkei Linux 99

16 ozenji:/home/sengoku % telnet toyokawa.gcd.org Trying Connected to toyokawa.gcd.org. Escape character is '^]'. 1 +OK < @toyokawa.gcd.org> 2 USER sengoku 3 +OK Password required for sengoku 4 PASS ******** 5 +OK 6 LIST 7 +OK RETR OK 12 Return-Path: <postmaster@gcd.org> 13 Delivered-To: sengoku@gcd.org 14 Received: (qmail 2541 invoked from network); 01 Jan :01: Received: from ozenji.gcd.org (sengoku@ ) 16 by toyokawa.gcd.org with SMTP; 01 Jan :01: Subject: test 18 From: postmaster@gcd.org 19 To: sengoku@gcd.org 20 Date: Sat, 01 Jan :01: SMTP # Hiroaki Sengoku <sengoku@gcd.org> QUIT 29 +OK Connection closed by foreign host. 100 Nikkei Linux

5. sendmail.cf

5. sendmail.cf Contents sendmail.cf NULL Client PPP Client Firewall sendmail.cf sendmail ( ) ( ) SMTP UUCP sendmail.cf OS sendmail sendmail.cf MX Lower MX MX RR sendmail.cf V1: sendmail 5 ( V1) V2, V3: