鈴鹿国際大学メールサーバの構築 SPAMメールの対応とWebメールシステムの導入

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㋈㣮࿖㓙ᄢቇࡔ࡯࡞ࠨ࡯ࡃߩ᭴▽

52#/ ࡔ࡯࡞ߩኻᔕߣ 9GD ࡔ࡯࡞ࠪࠬ࠹ࡓߩዉ౉

Construction of the Mail Server of Suzuka International University

Spam Filtering and Introduction of Webmail System

ේੳᔒ

㧖

Hitoshi Hara

Abstract

In this paper the process of building a university mail server using Linux operating system, spam filtering and a Webmail system is introduced. The hardware and specifications of the operating system are described.

Keywords : mail server, spam filtering, Webmail system

Ĳį

͉̲͛ͅġ

ㄭᐕ spam㧝)_{ࡔ࡯࡞ߩዯߊ㊂߇Ⴧᄢߒޔᧄቇᢎ⡯ຬ߆ࠄ߽ spam ኻ╷ߦߟ޿ߡߩⷐᦸ߇} ಴ߡ޿ߚޕ⃻࿷Ⓙ௛ߒߡ޿ࠆࡔ࡯࡞ࠨ࡯ࡃ㧔એ㒠ޔᣥࡔ࡯࡞ࠨ࡯ࡃߣ๭߱㧕ߪᧄቇߦࡀ࠶ ࠻ࡢ࡯ࠢ߇ᢝ⸳ߐࠇߚᒰೋ߆ࠄⒿ௛ߒߡ޿ࠆࠪࠬ࠹ࡓߢ޽ࠅޔᯏེޔOS㧔Operating System㧕ߣ߽ߦᣥᑼߣߥߞߡ޿ࠆޕOS ࠍᣂߒߊߒࠃ߁ߦ߽ᣢߦኻᔕᯏ⒳߆ࠄᄖࠇߡ޿ࠆޕ ࠃߞߡ੹࿁ޔᯏེߣ OS ࠍ৻ᣂߒߚࡔ࡯࡞ࠨ࡯ࡃ㧔એ㒠ޔᣂࡔ࡯࡞ࠨ࡯ࡃߣ๭߱㧕ࠍ᭴▽ ߒߡ spam ࡔ࡯࡞ኻ╷ࠍⴕ߁ߎߣߦߒߚޕ ᣥࡔ࡯࡞ࠨ࡯ࡃߢߪ㔚ሶࡔ࡯࡞ߩㅍାޔฃାޔࡈࠜࡢ࡯࠼㧔ォㅍ㧕ᯏ⢻ࠍ᦭ߒߡ޿ࠆޕ ߎߩᣥࡔ࡯࡞ࠨ࡯ࡃߩᯏ⢻ࠍߔߴߡ฽ߺޔᦝߦ spam ࡔ࡯࡞ኻ╷ߘߩઁߩᯏ⢻ࠍㅊടߔࠆ ߎߣߣߔࠆޕߟ߹ࠅᧄቇᢎ⡯ຬ෸߮ోቇ↢ߩࡔ࡯࡞ࠕࠞ࠙ࡦ࠻ࠍ↪ᗧߒޔ㔚ሶࡔ࡯࡞ߩㅍ ฃା߇ߢ߈ࠆߎߣߦട߃ߡޔዯߊࡔ࡯࡞ߦኻߔࠆ spam ࡔ࡯࡞ኻ╷ࠍᣉߔޕ߹ߚޔ੹࿁ߪ

(2)

ቇᄖ߆ࠄߩ㔚ሶࡔ࡯࡞ㅍฃାࠍน⢻ߣߔࠆߚ߼ Webmail ࠪࠬ࠹ࡓߩዉ౉߽ⴕ߁ޕ ᦝߦ Web ࠨ࡯ࡃ߽ᣥࡔ࡯࡞ࠨ࡯ࡃߣหဳߩࡑࠪࡦߢ޽ࠅᦨㄭਇ቟ቯߢ޽ߞߚߚ߼ޔߎࠇ߽ ᣂߒ޿ࠨ࡯ࡃߢㆇ↪ߔࠆߎߣߣߒߚޕ ⴫-1 ߦᣥࡔ࡯࡞ࠨ࡯ࡃߣᣂࡔ࡯࡞ࠨ࡯ࡃߩᯏ⢻ࠍᲧセߒߚ߽ߩࠍ␜ߔޕ ⴫-1 ᣥࡔ࡯࡞ࠨ࡯ࡃߣᣂࡔ࡯࡞ࠨ࡯ࡃߩᯏ⢻Ყセ ᯏ⢻ ᣥࡔ࡯࡞ࠨ࡯ࡃ ᣂࡔ࡯࡞ࠨ࡯ࡃ 㔚ሶࡔ࡯࡞ฃା ٤ ٤ 㔚ሶࡔ࡯࡞ㅍା ٤ ٤ ࡈࠜࡢ࡯࠼㧔ォㅍ㧕 ٤ ٤ spam ࡔ࡯࡞ኻ╷ ٤ Webmail ࠪࠬ࠹ࡓ ٤

2. ᯏེ᭴ᚑ

ᣂࡔ࡯࡞ࠨ࡯ࡃߦߪᣣᧄ HP ␠ߩ ProLiant ࠨ࡯ࡃ ML115 ࠍណ↪ߒߚޕML115 ߩਥⷐ ࠬࡍ࠶ࠢߪ⴫-2 ߩࠃ߁ߦߥࠆޕOS ߪઃዻߒߡ޿ߥ޿߇㕖Ᏹߦ቟ଔߥࡕ࠺࡞ߢ޽ࠅޔ᭽ޘ ߥࠞࠬ࠲ࡑ߽ࠗ࠭น⢻ߢ޽ࠆޕ੹࿁૶↪ߒߚߩߪᔅⷐᦨૐ㒢ߩࡂ࡯࠼࠙ࠚࠕࠍ៞タߒߚࡕ ࠺࡞ߛ߇ޔࠬࡍ࠶ࠢߣߒߡߪචಽߢ޽ࠆޕ੹࿁ߪߎߩ ML115 ࠍว⸘ 4 บዉ౉ߒߡࠪࠬ࠹ ࡓࠍ᭴▽ߔࠆޕ ⴫-2 ML115 ߩਥⷐࠬࡍ࠶ࠢ

CPU AMD Athlon 3500+(2.2GHz) ࡔࡕ࡝ PC2-5300 512MB ࠣ࡜ࡈࠖ࠶ࠢ ౝ⬿ 2MB ࡆ࠺ࠝࠦࡦ࠻ࡠ࡯࡜ శቇ࠼࡜ࠗࡉ CD-ROM ࠼࡜ࠗࡉ ࡂ࡯࠼࠺ࠖࠬࠢ SATA 80GB 1 บ ߘࠇߙࠇߩᯏེߪએਅߩࠃ߁ߦ᭴ᚑߔࠆޕ (1) ᢎ⡯ຬ↪ࡔ࡯࡞ࠨ࡯ࡃ ᣥࡔ࡯࡞ࠨ࡯ࡃߢߪቇ↢߽ᢎ⡯ຬ߽หߓࠨ࡯ࡃߢ㔚ሶࡔ࡯࡞ߩㅍฃାࠍⴕߞߡ޿ߚ ߇ޔߎࠇࠍಽഀߔࠆߎߣߣߒߚޕߘߩ߁ߜߩᢎ⡯ຬ↪ࠕࠞ࠙ࡦ࠻ࠍ▤ℂߔࠆࠨ࡯ࡃ

(3)

ߢ޽ࠆޕspam ኻ╷߿ Webmail ࠪࠬ࠹ࡓࠍዉ౉ߔࠆޕ (2) Web ࠨ࡯ࡃ౗ቇ↢↪ࡔ࡯࡞ࠨ࡯ࡃ ቇ↢↪㔚ሶࡔ࡯࡞ࠕࠞ࠙ࡦ࠻ࠍ▤ℂߔࠆࠨ࡯ࡃߣޔߎࠇ߹ߢㆇ↪ߒߡ޿ߚᣥ Web ࠨ࡯ࡃߩᯏ⢻ࠍ 1 บߦ㓸⚂ߔࠆߎߣߣߒߚޕቇ↢↪ࠕࠞ࠙ࡦ࠻ߪ⊓㍳ࠕࠞ࠙ࡦ࠻ᢙ ߇ᄙ޿ߎߣ߽޽ࠅޔᢎ⡯ຬ↪ࠕࠞ࠙ࡦ࠻ࠃࠅ߽૶↪ߢ߈ࠆኈ㊂ࠍዋߥߊߒޔ߹ߚ⽶ ⩄シᷫߩߚ߼ spam ኻ╷ࠍⴕࠊߥ޿ޕ߹ߚޔWebmail ࠪࠬ࠹ࡓ߽ዉ౉ߒߥ޿ޕ (3) NetCommons2 ↪ࠨ࡯ࡃ ࠣ࡞࡯ࡊ࠙ࠚࠕߣߒߡ NetCommons2 ࠍㆇ↪੍ቯߩࠨ࡯ࡃޕ⹜㛎ㆇ↪ਛߢ޽ࠆޕ (4) ੍஻ᯏེ ࡔ࡯࡞ࠨ࡯ࡃ߇ਇౕวࠍ߅ߎߒߚ㓙ߦ౉ࠇᦧ߃ࠆߚ߼ߩ੍஻ᯏེޕ ߹ߚޔㆇ↪ਛߩฦࠨ࡯ࡃߦߪ஗㔚߿⍍㔚╬ߦኻᔕߢ߈ࠆࠃ߁ߦ UPS㧞)_{ࠍዉ౉ߒߚޕ}

3. OS

OS ߪ Linux ࠍណ↪ߔࠆ߇ޔ᭽ޘߥ࠺ࠖࠬ࠻࡝ࡆࡘ࡯࡚ࠪࡦ߇ሽ࿷ߔࠆޕ੹࿁ߪએ೨ߦ ߽ౝㇱࠨ࡯ࡃ↪ߦ೑↪ߒߚߎߣߩ޽ࠆ Vine Linux 4.2 ࠍណ↪ߒߚޕᣣᧄߢ㐿⊒ߐࠇߡ޿ࠆ ࠺ࠖࠬ࠻࡝ࡆࡘ࡯࡚ࠪࡦߢ޽ࠅޔᣣᧄ⺆ࠍ೑↪ߒߚⅣႺߦ᦭೑ߢ޽ࠆޕࠗࡦࠬ࠻࡯࡞ߦవ ┙ߜޔ߹ߕࡄ࡯࠹࡚ࠖࠪࡦ᭴ᚑࠍ⠨߃ࠆޕߎߎߢߪ⴫-3 ߩࠃ߁ߦߒߚޕ ⴫-3 ࡄ࡯࠹࡚ࠖࠪࡦ᭴ᚑ ࡑ࠙ࡦ࠻૏⟎ ᓎഀ ኈ㊂ / ࡞࡯࠻㧔ਥⷐ࠺ࠖ࡟ࠢ࠻࡝㧕 14GB /swap ࠬࡢ࠶ࡊ㧔઒ᗐࡔࡕ࡝㧕 256MB /boot ࡉ࡯࠻㧔⿠േࡈࠔࠗ࡞㧕 100MB /home ࡎ࡯ࡓ࠺ࠖ࡟ࠢ࠻࡝ 60GB ࡞࡯࠻࠺ࠖ࡟ࠢ࠻࡝㧔ਥⷐ࠺ࠖ࡟ࠢ࠻࡝㧕ߪࡊࡠࠣ࡜ࡓ╬ࠪࠬ࠹ࡓߩࡔࠗࡦߣߥࠆㇱಽ ߢ޽ࠆޕ࡙࡯ࠩࠕࠞ࠙ࡦ࠻ߩ㔚ሶࡔ࡯࡞╬߇⸥ᙘߐࠇࠆࡎ࡯ࡓ࠺ࠖ࡟ࠢ࠻࡝ߪ೎ߩࡄ࡯࠹ ࡚ࠖࠪࡦߣߔࠆߎߣߢޔࠢ࡜࠶ࠪࡘᤨߩ࡝ࠬࠢࠍಽᢔߔࠆޕ OS ߩࠗࡦࠬ࠻࡯࡞⥄૕ߪ㕖Ᏹߦኈᤃߢ޽ࠆޕ߹ߕઁߩ PC ߆ࠄ Vine Linux ߩ౏ᑼࠨࠗ ࠻߳ࠕࠢ࠮ࠬߒޔCD ߩࠗࡔ࡯ࠫࡈࠔࠗ࡞ࠍ࠳࠙ࡦࡠ࡯࠼ߔࠆޕߘߩࠗࡔ࡯ࠫࡈࠔࠗ࡞ࠍ ᦠ߈ㄟߺ࠰ࡈ࠻ߢ CD-R ߳ᦠ߈ㄟ߻ޕߘߩᓟޔࠗࡦࠬ࠻࡯࡞ߔࠆࡑࠪࡦߢ CD-R ߆ࠄ⿠േ ߔࠇ߫⥄േ⊛ߦࠗࡦࠬ࠻࡯࡜߇⿠േߔࠆޕ

(4)

ࠗࡦࠬ࠻࡯࡜ߢߪࠗࡦࠬ࠻࡯࡞ࠝࡊ࡚ࠪࡦ߿ࡄ࡯࠹࡚ࠖࠪࡦ᭴ᚑޔࡀ࠶࠻ࡢ࡯ࠢធ⛯ 㧔IP ࠕ࠼࡟ࠬ߿ࡀ࠶࠻ࡑࠬࠢ╬ߩ⸳ቯ㧕ࠍ⸳ቯߔࠇ߫޽ߣߪ⥄േߢࠗࡦࠬ࠻࡯࡞߇ⴕࠊࠇ ࠆޕࠨ࡯ࡃߣߒߡㆇ↪ߔࠆߩߢޔࠗࡦࠬ࠻࡯࡞ࠝࡊ࡚ࠪࡦߪޟࠨ࡯ࡃޠࠍㆬ߱ޕࡄ࡯࠹ࠖ ࡚ࠪࡦ᭴ᚑߪవߦ␜ߒߚ⴫-3 ߩࠃ߁ߦ᭴ᚑߒߚޕᓟߪ⥄േ⊛ߦࡈࠜ࡯ࡑ࠶࠻ޔࡈࠔࠗ࡞ߩ ࠦࡇ࡯ޔࠗࡦࠬ࠻࡯࡞߇ⴕࠊࠇࠆޕౣ⿠േߒߚᓟߪࡠࠣࠗࡦ↹㕙߇⴫␜ߐࠇࠆޕ

4. ࡔ࡯࡞ࠨ࡯ࡃߩ઀᭽

ࡔ࡯࡞ࠨ࡯ࡃࠍ᭴▽ߔࠆߦ޽ߚࠅޔࡔ࡯࡞▤ℂߦ㑐ߒߡએਅߩߎߣࠍ઀᭽ߣߔࠆޕ (1) MTA㧟)_{ߣߒߡ Postfix ࠍណ↪ߔࠆ} MTA ߣߒߡߪ sendmail ߇ណ↪ߐࠇࠆߎߣ߇ᄙ޿߇ޔ⸳ቯ߇㔍⸃ߢㆇ↪߇㔍ߒ޿ޕ ߎߎߢߪㆇ↪▤ℂ߇Ყセ⊛ኈᤃߥ Postfix ࠍណ↪ߔࠆޕ (2) MDA㧠)_{ߣߒߡ Dovecot ࠍណ↪ߔࠆ} ࡙ ࡯ ࠩ ߇ ࡔ ࡯ ࡞ ࠢ ࡜ ࠗ ࠕ ࡦ ࠻㧡)_{ߢ 㔚 ሶ ࡔ ࡯ ࡞ ࠍ ⺒ ߻ 㓙 ߦ ᔅ ⷐ ߣ ߥ ࠆ ㈩ ㅍ} 㧔POP3㧢㧕_{㧕ࠍมࠆ࠰ࡈ࠻࠙ࠚࠕߣߒߡ Dovecot ࠍណ↪ߒߚޕIMAP ࡊࡠ࠻ࠦ࡞߽}

ࠨࡐ࡯࠻ߒߡ߅ࠅޔᓟㅀߔࠆ Webmail ࠪࠬ࠹ࡓߩ㓙ߦ߽೑↪ߔࠆޕ (3) ࡙࡯ࠩ▤ℂߪ Linux ߩࠕࠞ࠙ࡦ࠻ߣหᦼߔࠆ MySQL ߥߤߩ࠺࡯࠲ࡌ࡯ࠬߣหᦼߒߡ㔚ሶࡔ࡯࡞ࠍ▤ℂߔࠆߎߣ߽น⢻ߛ߇ޔ ߎߎߢߪ৻⥸⊛ߥ Linux ߩࠕࠞ࠙ࡦ࠻ߣหᦼߔࠆߎߣࠍ઀᭽ߣߔࠆޕ (4) ฦ࡙࡯ࠩߪ Linux ߩࠕࠞ࠙ࡦ࠻ߣߒߡࡠࠣࠗࡦߢ߈ߥ޿ ࠨ࡯ࡃߩ࠮ࠠࡘ࡝࠹ࠖࠍ⏕଻ߔࠆᗧ๧ߢޔࡠࠣࠗࡦ߇ਇⷐߥ࡙࡯ࠩߪ Linux ߩࠕ ࠞ࠙ࡦ࠻ߣߒߡࡠࠣࠗࡦߢ߈ߥߊߔࠆޕ઒ߦᣂࡔ࡯࡞ࠨ࡯ࡃࡑࠪࡦ߳⋥ធ⸅ࠇࠆᯏ ળ߇޽ߞߚߣߒߡ߽ࡠࠣࠗࡦߢ߈ߥ޿ޕ (5) ฦ࡙࡯ࠩߪ Quota ߦࠃࠅኈ㊂೙㒢ࠍ⸳ߌࠆ Quota ࠍዉ౉ߒޔฦ࡙࡯ࠩߦኈ㊂೙㒢ࠍ⸳ߌࠆޕࡂ࡯࠼࠺ࠖࠬࠢߩኈ㊂ߪ㒢ࠄࠇ ߡ޿ࠆߩߢޔ1 ࡙࡯ࠩ޽ߚࠅ߇೑↪ߢ߈ࠆኈ㊂ࠍ೙㒢ߔࠆޕ (6) ࡔ࡯࡞ߪ 1 ࡔ࡯࡞ 1 ࡈࠔࠗ࡞ߣߔࠆ ࡔ࡯࡞ߪ 1 ࡈࠔࠗ࡞ߦⶄᢙࡔ࡯࡞ࠍᩰ⚊ߔࠆᣇᑼ㧔Mailbox ᣇᑼ㧕ߣ 1 ࡈࠔࠗ࡞ 1 ࡔ࡯࡞ߣߔࠆᣇᑼ㧔Maildir ᣇᑼ㧕߇޽ࠆ߇ޔߎߎߢߪᓟ⠪ࠍណ↪ߔࠆޕMaildir ᣇ ᑼ ߛ ߣ ▤ ℂ ߔ ࠆ ࡈ ࠔ ࠗ ࡞ ᢙ ߪ Ⴧ ߃ ࠆ ߇ ޔ ࡈ ࠔ ࠗ ࡞ ߇ ⎕ ៊ ߒ ߚ ႐ ว ߩ ⵍ ኂ ߪ Mailbox ᣇᑼࠃࠅ߽ᄢ᏷ߦዋߥ޿ޕ

(5)

5. Postfix

ߩ⸳ቯ

࡙࡯ࠩߪቇᄖ߆ࠄࡔ࡯࡞ࠍㅍାߢ߈ߥ޿⸳ቯߣߔࠆޕቇᄖ߆ࠄߩ SMTP㧣)_{ߦࠃࠆࡔ࡯࡞} ㅍାࠍ⸵ߔ႐วޔㅢᏱߩ SMTP ࡊࡠ࠻ࠦ࡞ߩߺߢߪᥧภൻ߇ోߊ߆߆ߞߡ߅ࠄߕෂ㒾ߥߩ ߢ૗ࠄ߆ߩኻ╷߇ᔅⷐߣߥࠆޕ߹ߚޔߘߩ߹߹ߛߣ⺕ߢ߽⹺⸽ߥߒߢࡔ࡯࡞߇ㅍାߢ߈ߡ ߒ߹߁ޕࠃߞߡ SMTP-AUTH ߦࠃࠆ⹺⸽߇ᔅⷐߣߥࠆ߇ޔߘࠇߢ߽⹺⸽ߔࠆ㓙ߩࡄࠬࡢ ࡯࠼߇ᐔᢥߢࠗࡦ࠲࡯ࡀ࠶࠻਄ࠍᵹࠇࠆߎߣߦߥࠆޕࠃߞߡቇᄖ߆ࠄߩࡔ࡯࡞ㅍାࠍ⸵ߔ ႐วߦߪ TLS㧤)_{ߦࠃࠆᥧภൻ߇ᔅⷐߣߥࠆ߇ޔߎࠇࠍⴕ߁ߣ࡙࡯ࠩ஥ߩࡔ࡯࡞ࠢ࡜ࠗࠕࡦ} ࠻ߦㅊടߩ⸳ቯ߇ᔅⷐߣߥࠆޕ ߎߎ߹ߢ⸳ቯߒߡ߹ߢ࡙࡯ࠩ߇ࡔ࡯࡞ࠢ࡜ࠗࠕࡦ࠻ߢᄖㇱ߆ࠄߩធ⛯ࠍ⸵ߔᔅⷐ߇޽ࠆ ߆ߤ߁߆ߛ߇ޔࠊߑࠊߑ TLS ࠍዉ౉ߒߡᄖㇱ߆ࠄធ⛯ߢ߈ࠆࠃ߁ߦߔࠆࠃࠅ߽ޔౝㇱࡀ࠶ ࠻ࡢ࡯ࠢߩߺߢ⸃᳿ߢ߈ࠆ߶߁߇቟ోᕈߪ㜞޿ޕ ᒰೋޔspam ࡔ࡯࡞ኻ╷ߩ৻Ⅳߣߒߡޔ෩ኒߥ࠴ࠚ࠶ࠢࠍⴕߞߚ਄ߢㅢㆊߒߚ㔚ሶࡔ࡯ ࡞ߩߺࠍฃߌขࠆࠃ߁ߦ⸳ቯߒߚ߇ޔ࡙࡯ࠩ߆ࠄࡔ࡯࡞߇ฃߌขࠇߥ޿ߎߣ߇޽ࠆߣߩႎ ๔߇޽ߞߚߚ߼ᓢޘߦ೙㒢ࠍ✭߼ߚޕ⃻࿷ߢߪ೙㒢ࠄߒ޿೙㒢ߪ޽߹ࠅ߆ߌߡ޿ߥ޿߇ޔ ࡉ࡜࠶ࠢ࡝ࠬ࠻࠺࡯࠲ࡌ࡯ࠬߦࠃࠆ࠴ࠚ࠶ࠢ߿࡙࡯ࠩ⹺⸽ߪ᦭ലߦߒߡ޽ࠆޕ߹ߚޔਇᱜ ਛ⛮ߦࠃࠆ޿ࠊࠁࠆޟspam ࡔ࡯࡞ߩ〯ߺบޠߣߒߡ೑↪ߐࠇߥ޿ࠃ߁ߦޔਇᱜਛ⛮࠴ࠚ ࠶ࠢࠨࠗ࠻ߦࠃࠆ࠴ࠚ࠶ࠢࠍⴕߞߚޕߎࠇߦࠃࠅ⃻࿷ߩ⸳ቯߢਇᱜਛ⛮߇ⴕࠊࠇߥ޿ߎߣ ࠍ⏕⹺ߒߡ޿ࠆޕ

6. Webmail

ࠪࠬ࠹ࡓ

ߎࠇ߹ߢߩࠪࠬ࠹ࡓߢߪቇᄖ߆ࠄߩ㔚ሶࡔ࡯࡞ㅍฃାߪߢ߈ߥ߆ߞߚޕᣥࡔ࡯࡞ࠨ࡯ࡃ ߩࡈࠜࡢ࡯࠼ᯏ⢻ࠍ೑↪ߒߚ㔚ሶࡔ࡯࡞ߩォㅍߢޔ୘ੱᄾ⚂ߩࡊࡠࡃࠗ࠳߳ォㅍߔࠆߎߣ ߦࠃߞߡኻᔕߔࠆߩߺߢ޽ߞߚޕߎࠇߢߪޔቇᄖ߆ࠄᄢቇߩࡔ࡯࡞ࠕࠞ࠙ࡦ࠻ߦฃାߒߚ ࡔ࡯࡞ࠍ⺒߻ߎߣߪߢ߈ࠆ߇ޔቇᄖ߆ࠄᄢቇߩࡔ࡯࡞ࠕࠞ࠙ࡦ࠻ࠍ೑↪ߒߡࡔ࡯࡞ࠍㅍା ߔࠆߎߣߪߢ߈ߥ޿ޕߘߎߢ੹࿁ޔWebmail ࠪࠬ࠹ࡓࠍ᭴▽ߒޔߎߩ໧㗴ࠍ⸃᳿ߔࠆߎߣ ߦߒߚޕ ቇᄖ߆ࠄᣂࡔ࡯࡞ࠨ࡯ࡃ߳ࡔ࡯࡞ࠢ࡜ࠗࠕࡦ࠻߆ࠄធ⛯ߢ߈ࠆࠃ߁ߦߒߡޔቇᄖߣቇౝ ߢห╬ߩ೑↪ⅣႺߦߔࠆߣ޿߁ᣇᴺ߽޽ࠆ߇ޔ࠮ࠠࡘ࡝࠹ࠖߩ㕙ߢਇ቟߇޽ߞߚߚ߼ਛᱛ ߒߚޕWebmail ࠪࠬ࠹ࡓߥࠄ߫ Internet Explorer ߿ Firefox ߥߤߩࡉ࡜࠙ࠩ߇޽ࠇ߫ߤ ࠎߥ PC ⅣႺߢ߽ࠗࡦ࠲࡯ࡀ࠶࠻ࠍ⚻↱ߒߡ೑↪น⢻ߢ޽ࠅޔSSL㧥)_{ߦࠃࠆㅢାᥧภൻߢ} ࠮ࠠࡘ࡝࠹߽ࠖ଻ߚࠇࠆޕ߹ߚޔࠕࠢ࠮ࠬߢ߈ࠆ URL ࠍ⍮ࠄߥߌࠇ߫ Webmail ߩࡍ࡯ࠫ ߳ߚߤࠅ⌕ߊߎߣ߽ߢ߈ߥ޿ޕᦝߦޔWebmail ࠪࠬ࠹ࡓߪᣂࡔ࡯࡞ࠨ࡯ࡃߣหߓࠪࠬ࠹ࡓ

(6)

਄ߦ㈩⟎ߒߡ޽ࠆߩߢ቟ోߦㆇ↪ߔࠆߎߣ߇ߢ߈ࠆޕ

੹࿁ߪ Webmail ࠪࠬ࠹ࡓߦ SquirrelMail ࠍណ↪ߒߚޕߎࠇߪ PHP ࡌ࡯ࠬߩࠪࠬ࠹ࡓ ߢޔIMAP ࡊࡠ࠻ࠦ࡞ߦࠃࠅࡔ࡯࡞ࠨ࡯ࡃߣㅢାߒߡ㔚ሶࡔ࡯࡞ࠍㅍฃାߔࠆޕࠃߞߡ MTA ߇ POP3 એᄖߦ IMAP ࠍࠨࡐ࡯࠻ߒߡ޿ࠆᔅⷐ߇޽ࠆޕ

ࠗࡦࠬ࠻࡯࡞ߪ Apache2㧝㧜)_{ߩ SSL ࠨࡐ࡯࠻߇ࠗࡦࠬ࠻࡯࡞ߐࠇߚⅣႺߢ޽ࠇ߫Ყセ⊛} ኈᤃߢ޽ࠆޕSquirrelMail ߩ࠰ࡈ࠻࠙ࠚࠕࠕ࡯ࠞࠗࡉࠍዷ㐿ߒޔࡉ࡜࠙ࠩ߆ࠄࠕࠢ࠮ࠬߢ ߈ࠆ࠺ࠖ࡟ࠢ࠻࡝߳ዷ㐿ߒߚ࠰࡯ࠬࡈࠔࠗ࡞ࠍ⒖േޔߘߩᓟ⸳ቯࡊࡠࠣ࡜ࡓߦࠃࠅ⸳ቯࠍ ⴕ߃߫ࠃ޿ޕ ೑↪ᣇᴺߪࡉ࡜࠙ࠩ߆ࠄᜰቯߒߚ URL ߳ࠕࠢ࠮ࠬߒޔࡠࠣࠗࡦฬ㧔ࠕࠞ࠙ࡦ࠻ฬ㧕ߣ ࡄ ࠬ ࡢ ࡯ ࠼ ࠍ ౉ ജ ߒ ߡ ࡠ ࠣ ࠗ ࡦ ߔ ࠆ ߛ ߌ ߢ ޽ ࠆ ޕ ৻ ⥸ ⊛ ߥ ࡊ ࡠ ࡃ ࠗ ࠳ ߇ ឭ ଏ ߒ ߡ ޿ ࠆ Webmail ࠪࠬ࠹ࡓࠃࠅߪ⧯ᐓᯏ⢻߇ഠࠆ߇ޔ㔚ሶࡔ࡯࡞ߩㅍฃାޔࠕ࠼࡟ࠬᏭᯏ⢻╬৻ㅢ ࠅߩᠲ૞߇ߢ߈ࠆޕ߹ߚࡊ࡜ࠣࠗࡦࠍዉ౉ߔࠆߎߣߦࠃࠅޔࡔ࠶࠮࡯ࠫࠕ࡯ࠞࠗࡉᯏ⢻㧔㔚 ሶࡔ࡯࡞ࠍ࿶❗ߒߡ࠳࠙ࡦࡠ࡯࠼ߢ߈ࠆᯏ⢻㧕ޔ⃻࿷ߩ૶↪ኈ㊂⴫␜㧔↹㕙Ꮐ਄㧕߇ߢ߈ࠆ ࠃ߁ߦߒߡ޽ࠆ㧔࿑-1㧕ޕ ࿑-1 Webmail ࠪࠬ࠹ࡓߩ↹㕙

7. spam

ࡔ࡯࡞ኻ╷

spam ࡔ࡯࡞ߪᐕޘჇടߒߡ޿ࠆޕࡊࡠࡃࠗ࠳߿ฦ⒳࠰ࡈ࠻࠙ࠚࠕ஥߽᭽ޘߥኻ╷ࠍⴕ ߞߡ޿ࠆ߇᳿ቯ⊛ߥ߽ߩߪᧂߛߦߥ޿ޕߎߎߢⴕ߁ spam ࡔ࡯࡞ኻ╷߽ਁోߢߪߥ޿߇ޔ

(7)

ߘߩ৻ഥߣߥࠆ߽ߩߢ޽ࠆޕ

੹࿁ߩ spam ࡔ࡯࡞ኻ╷ߦߪ SpamAssassin ࠍ೑↪ߒߚޕ޽ࠄ߆ߓ߼ spam㧔޽ࠆ޿ߪ ham㧝㧝)_{㧕ߩ࡞࡯࡞ࠍ⸳ቯߒߡ߅ߊߣޔSpamAssassin ߇ࠬࠦࠕࠍߟߌࠆޕߘߩࠬࠦࠕࠍర} ߦ spam ߆ߤ߁߆ߩ್ᢿࠍߔࠆߩߢ޽ࠆޕࠬࠦࠕߩߒ߈޿୯ࠍ૗ὐߦ⸳ቯߔࠆ߆ߦࠃߞߡ spam ߩ್ቯࠍ෩ߒߊ߽↞ߊ߽ߢ߈ࠆޕ ߹ߚޔߎࠇߪࡌࠗࠫࠕࡦࡈࠖ࡞࠲ࠍ೑↪ߒߡቇ⠌ߐߖࠆߎߣ߽ߢ߈ࠆޕ࡙࡯ࠩ߇ spamޔ ߽ߒߊߪ ham ߣ್ቯߒߚࡔ࡯࡞ࠍ SpamAssassin ߢቇ⠌ߐߖࠆߎߣߦࠃࠅޔ್ቯߩ♖ᐲ ࠍ㜞߼ࠆߎߣ߇ߢ߈ࠆߩߢ޽ࠆޕSpamAssassin ߩ઀⚵ߺߪ࿑-2 ߩࠃ߁ߦߥߞߡ߅ࠅޔߘ ߩᚻ㗅ߪᰴߩࠃ߁ߦߥߞߡ޿ࠆޕ ࿑-2 Procmail ߣ SpamAssassin ߩ઀⚵ߺ

(1) MTA ߢ޽ࠆ Postfix ߇㈩ㅍవߢ޽ࠆ࡙࡯ࠩߩ Maildir ࠺ࠖ࡟ࠢ࠻࡝߳㔚ሶࡔ࡯࡞ࠍ ࠦࡇ࡯ߔࠆ㑆ߦࡔ࡯࡞ࡈࠖ࡞࠲ Procmail ࠍഀࠅㄟ߹ߖࠆޕProcmail ߪᧄ᧪ޔฃା ߒߚ㔚ሶࡔ࡯࡞ࠍ․ቯߩ࡞࡯࡞ߦᓥߞߡᝄࠅಽߌࠆ࠰ࡈ࠻࠙ࠚࠕߢ޽ࠆ߇ޔߎࠇࠍ ೑↪ߒߡ SpamAssassin ߳㔚ሶࡔ࡯࡞ࠍォㅍߔࠆޕ (2) 㔚ሶࡔ࡯࡞ࠍฃߌขߞߚ SpamAssassin ߪ⸳ቯߐࠇߚ࡞࡯࡞ߦࠃߞߡࠬࠦࠕࠍߟߌ ߡ㔚ሶࡔ࡯࡞ߩࡋ࠶࠳ᖱႎ㧔X-Spam-*㧕ߦࠬࠦࠕ߿ߘߩઁߩᖱႎࠍઃടߔࠆޕspam ߢ޽ߞߚ႐วߪޔ⴫㗴㧔Subject㧕ߩవ㗡߳ޟ[SPAM]ޠߩᢥሼࠍઃടߔࠆޕ (3) ᖱႎࠍઃടߒߚࡔ࡯࡞ࠍ Procmail ߳ᚯߒޔߘߎ߆ࠄ࡙࡯ࠩߩ Maildir ࠺ࠖ࡟ࠢ࠻ ࡝߳㈩ㅍߔࠆޕ Procmail ߳㔚ሶࡔ࡯࡞߇ᚯߐࠇߚᤨὐߢ್ቯࠍⴕ޿ޔspam ⥄૕ࠍ೥㒰ߒߡ࡙࡯ࠩ߳㈩

Postfix _Procmail SpamAssassin

࡙࡯ࠩߩ Maildir

Ԙ Ԛ

Ԝ Ԟ

(8)

ㅍߐࠇߥ޿ࠃ߁ߦߔࠆߎߣ߽น⢻ߢ޽ࠆ߇ޔ੹࿁ߪ೥㒰ߖߕߦߘߩ߹߹㈩ㅍߔࠆߎߣߦߒ ߚޕߎࠇߪ SpamAssassin ߩߟߌࠆࠬࠦࠕ߇ㆡಾߢߥߊޔ⺋್ቯࠍⴕߞߡߒ߹߁ߣ޿߁น ⢻ᕈࠍឃ㒰ߔࠆߚ߼ߢ޽ࠆޕ100㧑ߩ⏕₸ߢ spam ߆ߤ߁߆ࠍᯏ᪾⊛ߦ್ᢿߔࠆᣇᴺ߇ߥ ޿㒢ࠅߪߎߩࠃ߁ߦߒߚ߶߁߇቟ోߢ޽ࠆޕߎߩߚ߼೥㒰ߔࠆ߆ุ߆ߩᦨ⚳್ᢿߪ࡙࡯ࠩ ߳ᆔߨࠆߎߣߦߥࠆޕ࡙࡯ࠩߪࡔ࡯࡞ࠢ࡜ࠗࠕࡦ࠻ߦࠃࠅ⴫㗴ߩޟ[SPAM]ޠࠍࠠ࡯ࡢ࡯ ࠼ߣߒߡ spam ኾ↪ࡈࠜ࡞࠳߳ᝄࠅಽߌ╬ⴕ߁ޕᓟߪߘߩ߹߹೥㒰ߔࠆߎߣ߽ޔ⴫㗴߿ౝ ኈࠍ࠴ࠚ࠶ࠢߒߡ߆ࠄ೥㒰ߔࠆߎߣ߽⥄↱ߦㆬᛯߢ߈ࠆޕࡔ࡯࡞ࠢ࡜ࠗࠕࡦ࠻ߢࡈࠜ࡞࠳ ᝄࠅಽߌࠍߒߡ߅ߌ߫ޔ⴫㗴߿ౝኈࠍ࠴ࠚ࠶ࠢߒߡ߆ࠄ೥㒰ߔࠆ႐วߢ߽ spam ߆ߤ߁߆ ߩ್ᢿߪᲧセ⊛⍴ᤨ㑆ߢᷣ߹ߖࠆߎߣ߇ߢ߈ࠆߣ⠨߃ࠄࠇࠆޕ SpamAssassin ߩ࠺ࡈࠜ࡞࠻࡞࡯࡞ߪ◲⚛ߢޔᦝߦᣣᧄ⺆ኻᔕ߇ߢ߈ߡ޿ߥ޿ߩߢޔߎ ߜࠄߢᣂߚߦ૞ᚑߔࠆᔅⷐ߇޽ࠆޕߎࠇࠍ 0 ߆ࠄ૞ᚑߔࠆߩߪ㕖Ᏹߦᤨ㑆߇߆߆ࠆ਄ߦ࿎ 㔍ߥߩߢޔ੹࿁ߪ TLEC㧔Tokyo Linux Entertainment Community㧕߇㈩Ꮣߔࠆ࡙࡯ࠩ ቯ⟵ࡈࠔࠗ࡞ࠍ೑↪ߐߖߡ޿ߚߛ޿ߚޕߎࠇߪᣣᧄ⺆ߩ spam ߦ߽ኻᔕߒߚቯ⟵ࡈࠔࠗ࡞ ߢ޽ࠆޕ ࡔ࡯࡞ࠨ࡯ࡃ߳ዯ޿ߚ spam ࡔ࡯࡞߆ࠄቇ⠌ߔࠆߎߣ߽น⢻ߢ޽ࠆ߇ޔ⃻࿷ߩߣߎࠈቇ ⠌ߪᚻ૞ᬺߢⴕߞߡ޿ࠆޕ ߹ߚޔspam ߣ್ቯߔࠆࠬࠦࠕߩߒ߈޿୯ߪ 5.0 ߣ⸳ቯߒߚޕ࠺ࡈࠜ࡞࠻ߢߪ 15.0 ߢ޽ ߞߚ߇ޔߎࠇߢߪ߶ߣࠎߤߩ spam ߇ spam ߣ್ቯߐࠇߥ߆ߞߚޕߎߩ⸳ቯߢඨᐕ㑆ㆇ↪ ߒߚ߇ޔ⃻࿷ߩߣߎࠈ ham ߣ್ቯߐࠇߚ spam ߪ޽ߞߡ߽ޔspam ߣ್ቯߐࠇߚ ham ߪ ߥ߆ߞߚޕߛ߇ଐὼߣߒߡ spam ߣ್ቯߐࠇߥ޿ spam ߇ሽ࿷ߔࠆߩߢޔ߽߁ዋߒ⛔⸘ࠍ ߣߞߡ߆ࠄߒ߈޿୯ࠍ⺞ᢛߔࠆᔅⷐ߇޽ࠆ߆߽ߒࠇߥ޿ޕ

8. ࠣ࡞࡯ࡊ࠙ࠚࠕ

ࠣ࡞࡯ࡊ࠙ࠚࠕߩዉ౉ߦࠃࠅᬺോߩല₸ൻࠍߪ߆ࠆޕࠪࠬ࠹ࡓߣߒߡߪ࿖┙ᖱႎቇ⎇ⓥ ᚲ߇㐿⊒ߒߚ NetCommons2 ࠍណ↪ߔࠆޕߘߩ೑ὐߣߒߡߪએਅߩࠃ߁ߥ߽ߩ߇޽ߍࠄࠇ ࠆޕ Ԙ ቇౝᢥᦠߩ౒᦭㧔࠳࠙ࡦࡠ࡯࠼㧕 ԙ ⴕ੐੍ቯ⴫㧔ࠞ࡟ࡦ࠳࡯㧕 Ԛ ᣉ⸳੍⚂ ԛ ឝ␜᧼ Ԝ Q&A㧔FAQ㧕

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એਅߪޔၮᧄ⊛ߦࡠࠣࠗࡦߒߚ࡙࡯ࠩߦኻߔࠆࠨ࡯ࡆࠬߣ⠨߃ߡ޿ࠆޕ ቇౝᢥᦠߩ౒᦭ߪޔឭ಴ᦠ㘃ߩࡈࠜ࡯ࡑ࠶࠻߿ޔฦ⒳ࡑ࠾ࡘࠕ࡞╬ߩ࠳࠙ࡦࡠ࡯࠼߇ߢ ߈ࠆࠃ߁ߦߔࠆߎߣߢ޽ࠆޕߎࠇߦࠃߞߡ࠳࠙ࡦࡠ࡯࠼ߒߚࡈࠜ࡯ࡑ࠶࠻ߦ Word ╬ߢ⸥ ౉ߒߚᓟߦශ೚ߔࠇ߫ޔߘߩ߹߹ឭ಴ߢ߈ࠆᦠ㘃߇ߢ߈޽߇ࠆޕⴕ੐੍ቯ⴫ߦߟ޿ߡߪޔ NetCommons2 ߩࠞ࡟ࡦ࠳࡯ᯏ⢻ߦࠃࠅᏱߦ⛔৻ߐࠇߚᦨᣂ ࠍෳᾖߔࠆߎߣ߇ߢ߈ࠆࠃ ߁ߦߥࠆޕ߽ߜࠈࠎޔᜂᒰ⠪ߪᏱߦᣂߒ޿੍ቯࠍᦠ߈ㄟࠎߢ߅ߊᔅⷐ߇޽ࠆޕળ⼏ቶ߿ᢎ ቶ╬ߩᣉ⸳੍⚂߽ⴕ߃ࠆࠃ߁ߦߥࠇ߫ޔNetCommons2 ਄ߢߔߋߦⓨ޿ߡ޿ࠆᤨ㑆Ꮺ߇ࠊ ߆ࠆߩߢଢ೑ߢ޽ࠆޕឝ␜᧼ߪ㔚ሶࡔ࡯࡞ળ⼏ߦઍࠊࠆ߽ߩߣߒߡ೑↪ߒߡ᰼ߒ޿ߣ⠨߃ ߡ޿ࠆޕ㔚ሶࡔ࡯࡞ߢߪࡠࠣ㧔⸥㍳㧕߇ᱷࠅߦߊ޿߇ޔឝ␜᧼ߢ޽ࠇ߫ߘߩ߹߹ࡠࠣ߇ᱷ ࠆߩߢ◲නߦᓟ߆ࠄෳᾖߢ߈ࠆޕQ&A ߢߪࠃߊ޽ࠆ⾰໧╬ߩ╵߃ࠍ߹ߣ߼ߡ࠺࡯࠲ࡌ࡯ ࠬߣߒߡᱷߒߡ߅ߊߎߣࠍ⠨߃ߡ޿ࠆޕ߹ߚޔળ⼏ߩ⾗ᢱ߿⼏੐㍳╬ࠍ౒᦭ᢥᦠߣߒߡ⟎ ߊߎߣߦࠃࠅࡍ࡯ࡄ࡯࡟ࠬ߳ߩ⽸₂߽ߢ߈ࠆߣ⠨߃ࠄࠇࠆޕ

9. ࡃ࠶ࠢࠕ࠶ࡊ

㔚Ḯߩࡃ࠶ࠢࠕ࠶ࡊߣޔࠪࠬ࠹ࡓ߿࠺࡯࠲ߩࡃ࠶ࠢࠕ࠶ࡊߦߟ޿ߡኻ╷ࠍⴕ߁ߎߣߦࠃ ࠅޔࠪࠬ࠹ࡓ᡿㓚ࠍ࿁ㆱߒޔᓳరࠍኈᤃߦߔࠆޕ (1) 㔚Ḯߩࡃ࠶ࠢࠕ࠶ࡊ ஗㔚߿⍍㔚╬ޔ㔚Ḯ߇⏕଻ߐࠇߥ޿႐วߩኻ╷ߣߒߡ UPS ࠍዉ౉ߒߡ޿ࠆޕ஗ 㔚╬ߦࠃࠅ㔚Ḯ߇ᱜߒߊ⏕଻ߐࠇߡ޿ߥ޿⁁ᘒ߇㐳ߊ⛯޿ߚߣ್ᢿߐࠇߚ႐วޔ UPS ߆ࠄࠨ࡯ࡃ߳ࠪࡖ࠶࠻࠳࠙ࡦߩାภ߇ㅍࠄࠇࠆޕߘߩᓟޔ㔚Ḯ߇ᱜߒߊ⏕଻ߐ ࠇࠇ߫ౣ߮ UPS ߇ᓳᏫߒޔࠨ࡯ࡃ߽⿠േߔࠆޕ (2) ࠪࠬ࠹ࡓߣ࠺࡯࠲ߩࡃ࠶ࠢࠕ࠶ࡊ

USB ធ⛯ߩᄖઃߌࡂ࡯࠼࠺ࠖࠬࠢ㧔I࡮O ࠺࡯࠲⵾ HDH-U500SR2ޔኈ㊂ 500GB㧕 ࠍჇ⸳ߒޔߘߜࠄ߳ࠪࠬ࠹ࡓߣ࠺࡯࠲ߩࡃ࠶ࠢࠕ࠶ࡊࠍߣࠆߎߣߦߔࠆޕᄖઃߌߢ ೎ߩ⸥ᙘᇦ૕߳ࡃ࠶ࠢࠕ࠶ࡊߔࠆߎߣߦࠃࠅޔ቟ోᕈࠍ⏕଻ߔࠆޕ ࡃ࠶ࠢࠕ࠶ࡊߦߪࡄ࡯࠹࡚ࠖࠪࡦන૏ߢࡃ࠶ࠢࠕ࠶ࡊߢ߈ޔᏅಽࡃ࠶ࠢࠕ࠶ࡊ߽ น⢻ߥ dump ࠦࡑࡦ࠼ࠍ૶↪ߒߚޕౕ૕⊛ߦߪએਅߩࠃ߁ߥࠬࠤࠫࡘ࡯࡞ߢࡃ࠶ࠢ ࠕ࠶ࡊࠍߣࠆޕ Ԙ ࡈ࡞ࡃ࠶ࠢࠕ࠶ࡊࠍᣣᦐᣣඦ೨ 3 ᤨ 5 ಽߦⴕ߁ޕ ԙ ᦬ᦐᣣ㨪࿯ᦐᣣߩඦ೨ 3 ᤨ 5 ಽߦޔԘߢߣߞߚࡈ࡞ࡃ࠶ࠢࠕ࠶ࡊ߆ࠄߩᏅಽࡃ

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࠶ࠢࠕ࠶ࡊࠍⴕ߁ޕ Ԛ Ԙߣԙߩࠬࠢ࡝ࡊ࠻㧔৻ㅳ㑆ಽޔว⸘ 7 ࡈࠔࠗ࡞㧕ࠍ cron㧝㧞)_{ߦࠃࠅታⴕߔࠆޕ} ฦࡃ࠶ࠢࠕ࠶ࡊߪ 1 ㅳ೨ߩࠦࡇ࡯ࠍᱷߔᒻߣߔࠆߩߢޔᦨ㐳ߢ 2 ㅳ㑆೨ޔᦨ⍴ߢ߽ 1 ㅳ 㑆೨ߩ⁁ᘒ߹ߢᚯߔߎߣ߇ߢ߈ࠆޕฦㅳߩᣣᦐᣣ߹ߢᚯߔ႐วߪޔࡈ࡞ࡃ࠶ࠢࠕ࠶ࡊߩߺ ࠍ࡝ࠬ࠻ࠕߔࠇ߫⦟޿ޕ᦬ᦐᣣ㨪࿯ᦐᣣ߹ߢߩ⁁ᘒߦᚯߔ႐วߪޔߘߩㅳߩᣣᦐᣣߩࡈ࡞ ࡃ࠶ࠢࠕ࠶ࡊ߆ࠄ࡝ࠬ࠻ࠕߒޔ⹥ᒰߔࠆᦐᣣߩᏅಽࡃ࠶ࠢࠕ࠶ࡊࠍㅊടߢ࡝ࠬ࠻ࠕߔࠇ߫ ⦟޿ޕ

10. ੹ᓟߩ⺖㗴

SpamAssassin ߩ࡞࡯࡞ߪቯᦼ⊛ߦᣂߒ޿߽ߩ߳ᚻേߢᦝᣂߒߡ޿ࠆ߇ޔham ߣ್ቯߐ ࠇࠆ spam ߪଐὼߣߒߡሽ࿷ߔࠆޕ޽ࠆ⒟ᐲ⥄േ⊛ߦቇ⠌ߔࠆ઀⚵ߺࠍ૞ߞߡ࡞࡯࡞ࠍᦝ ᣂߐߖࠆᣇᴺࠍតߞߡ޿ࠆޕ ዉ౉ߒߚ Webmail ࠪࠬ࠹ࡓߪ៤Ꮺ㔚⹤߆ࠄߩࠕࠢ࠮ࠬߦኻᔕߒߡ޿ߥ޿߇ޔ዁᧪⊛ߦ ߪ៤Ꮺ㔚⹤߆ࠄߢ߽໧㗴ߥߊࠕࠢ࠮ࠬߢ߈ࠆ઀⚵ߺࠍዉ౉ߒߚ޿ޕߘ߁ߔࠇ߫಴వ߆ࠄᚻ シߦ㔚ሶࡔ࡯࡞ߩ⏕⹺߇ߢ߈ࠆࠃ߁ߦߥࠆޕ ࠣ࡞࡯ࡊ࠙ࠚࠕߣߒߡ⹜㛎ㆇ↪ਛߩ NetCommons2 ࠍᱜᑼㆇ↪ߒޔቇౝᖱႎߩ౒᦭ࠍ࿑ ࠅߚ޿ߣ⠨߃ߡ޿ࠆޕࠣ࡞࡯ࡊ࠙ࠚࠕࠍቇᄖ߆ࠄ೑↪ߢ߈ࠆߣଢ೑ߢߪߥ޿߆ߣ޿߁ᗧ⷗ ߽㗂޿ߚޕߎࠇߦߟ޿ߡߪᖱႎṳᵨߩෂ㒾ᕈ߽޽ࠆߩߢᘕ㊀ߦᬌ⸛ߒߚ޿ޕ

߹ߚޔDNS㧔Domain Name Service㧕߽੹࿁ߣห᭽ߦ Linux ߢ᭴▽ߒޔᣂߒ޿ࠪࠬ࠹ ࡓߣߒߡㆇ↪ߒߚ޿ߣ⠨߃ߡ޿ࠆޕ⃻࿷ߪᄖㇱะߌ DNS ߣౝㇱะߌ DNS ߇േ૞ߒߡ޿ࠆ ߇ޔߎࠇࠄࠍᣂߒ޿ࠪࠬ࠹ࡓߦ⟎߈឵߃ߡߒ߹߃߫ฎ޿ࠨ࡯ࡃߪోߡ౉ࠇᦧ߃ࠆߎߣ߇ߢ ߈ࠆޕߘ߁ߔࠇ߫⠧᧎ൻߦࠃࠆ᡿㓚ߩ໧㗴߿ࡑࠪࡦࡄࡢ࡯ߩ໧㗴߇⸃ᶖߐࠇࠆߣᕁࠊࠇࠆޕ

11. ߅ࠊࠅߦ

੹࿁ᣂߚߦࡔ࡯࡞ࠨ࡯ࡃࠍ᭴▽ߒߚ߇ޔ⸳ቯߩ⺞ᢛ߇㔍ߒ޿ߎߣ߇ᡷ߼ߡࠊ߆ߞߚޕ Postfix ߩ⸳ቯ╬ޔࠃࠅ⦟޿ࠪࠬ࠹ࡓࠍ᭴▽ߢ߈ࠆࠃ߁ߦߎࠇ߆ࠄ߽ࡔࡦ࠹࠽ࡦࠬࠍ⛯ߌߡ ޿߆ߥߊߡߪߥࠄߥ޿ޕ ߹ߚࡀ࠶࠻ࡢ࡯ࠢో૕߇⠧᧎ൻߒߡ޿ࠆߩߢޔ㗅ᰴᣂߒ޿ᯏེ߳ߩ࡝ࡊ࡟࡯ࠬࠍ⠨߃ࠆ ᔅⷐ߇޽ࠆޕ᭴▽ߢ߈ࠆࠨ࡯ࡃߦ㑐ߒߡߪ⥄೨ߢ⸳ቯࠍⴕߞߚᣇ߇ో૕᭴ᚑ߇ᛠីߢ߈ޔ ㆇ↪▤ℂ߽ኈᤃߢ޽ࠆߣᗵߓߚޕ

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ᵈ

㧝) _{ᐢ๔߿൘⺃ߥߤߩㅅᖺࡔ࡯࡞ߩߎߣޕ}

㧞)_{Uninterruptible Power Supply : ή஗㔚㔚Ḯⵝ⟎ޕ}

㧟)_{Mail Transfer Agent : ࡔ࡯࡞ォㅍࠛ࡯ࠫࠚࡦ࠻ޕ}

㧠)_{Mail Delivery Agent : ࡔ࡯࡞㈩ㅍࠛ࡯ࠫࠚࡦ࠻ޕ}

㧡) _{㔚ሶࡔ࡯࡞ࠍ⺒ߺᦠ߈ߔࠆߚ߼ߩ࠰ࡈ࠻࠙ࠚࠕޕࡔ࡯࡜ޔMUA㧔Mail User Agent㧕ߣ} ߽޿߁ޕ

㧢)_{Post Office Protocol Version 3 : ࠗࡦ࠲࡯ࡀ࠶࠻ߢ㔚ሶࡔ࡯࡞ࠍฃାߔࠆߚ߼ߩࡊࡠ࠻} ࠦ࡞ޕ

㧣)_{Simple Mail Transfer Protocol : ࠗࡦ࠲࡯ࡀ࠶࠻ߢ㔚ሶࡔ࡯࡞ࠍォㅍߔࠆߚ߼ߩࡊࡠ࠻} ࠦ࡞ޕ

㧤)_{Transport Layer Security : ࠗࡦ࠲࡯ࡀ࠶࠻਄ߢᖱႎࠍᥧภൻߒߡㅍฃାߔࠆࡊࡠ࠻ࠦ} ࡞ߩ৻⒳ޕ

㧥)_{Secure Socket Layer : ࠗࡦ࠲࡯ࡀ࠶࠻਄ߢᖱႎࠍᥧภൻߒߡㅍฃାߔࠆࡊࡠ࠻ࠦ࡞ߩ} ৻⒳ޕ

㧝㧜)_{Apache HTTP ServerޕWeb ࠨ࡯ࡃ࠰ࡈ࠻࠙ࠚࠕޕ}

㧝㧝)_{spam ߢߪߥߊޔฃߌขࠅߚ޿ࡔ࡯࡞ߩߎߣޕ}

㧝㧞) _{࡚ࠫࡉ㧔ࠬࠢ࡝ࡊ࠻㧕ࠍቯᦼ⊛ߦ⥄േታⴕߔࠆߚ߼ߩࠦࡑࡦ࠼ޕ} ෳ⠨ᢥ₂

࠻࠶ࡊࡑࡀࠫࡔࡦ࠻ޡVine Linux 2.5 ߣ Webmin ߢ૞ࠆࠦࡑࡦ࠼ਇⷐߩ⥄ቛࠨ࡯ࡃ࡯ޢᩣᑼળ␠ࡠ ࡯ࠞࠬ, 2002 ᐕ

㊁᧛⋥ޡVine Linux 2.5 ࠬ࠲࡯࠻ࡉ࠶ࠢޢᩣᑼળ␠ࠕࠬࠠ࡯, 2002 ᐕ ࿖┙ᖱႎቇ⎇ⓥᚲޡ࿖┙ᖱႎቇ⎇ⓥᚲޢhttp://www.nii.ac.jp/

ᣣᧄ SpamAssassin ࡙࡯ࠩળޡᣣᧄ SpamAssassin ࡙࡯ࠩળޢhttp://spamassassin.jp/ Frederick P. Brooks, Jr.ޡThe Postfix Home Pageޢhttp://www.postfix.org/

Hewlett-Packard Development Company, L.Pޡᣣᧄ HP ߳ࠃ߁ߎߘޢ http://welcome.hp.com/country/jp/ja/welcome.html [email protected]ޡPostfix ߩߵ࡯ߓޢhttp://www.postfix-jp.info/ Project VineޡVine Linux Home Pageޢhttp://vinelinux.org/

The Apache SpamAssassin ProjectޡSpamAssassin: Welcome to SpamAssassinޢ http://spamassassin.apache.org/

The NetCommons ProjectޡNetCommons2 ౏ᑼࠨࠗ࠻ޢhttp://www.netcommons.org/

The SquirrelMail Project TeamޡSquirrelMail - Webmail for Nutsޢhttp://www.squirrelmail.org/ The SquirrelMail Project, Japan ޡ SquirrelMail Japan - Webmail for Nuts! ޢ http://www.squirrelmail.jp/

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