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1 2 - - PDF document

Apr 21, 2023 275 likes •372 views

SLIDE 1 ✂✁☎✄✆✄✞✝✠✟✠✟☛✡✌☞✎✍✑✏✓✒ ✔ ☞✎✍✠✕✖✡✘✗✚✙✜✛✣✢✥✤✖✡✌☞✚✍✦☞✧✕✩★✪✙✠✤✬✫✧☞✎✛✭✡✮✤✣✢✥✤✖✡✮✯✧✝ ✁☎✢✱✰✦✝✠✟✠✝✱✛✲✯✓✡✌✳✴✝ ✵✖✶✸✷ ✹✻✺✽✼✬✹✻✺✿✾✣❀ ❁✻✶ ❂❄❃✬❅❆✼

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❇❈✝❉✳✴✢✱❊ ❋❍●❏■▲❑ ▼❉◆P❖◗❑ ▼❙❘❯❚✌❑ ❱❳❲❨❘❬❩✖❖P❖❳◆❄❘❭◆◗❱❄◆❳▼❆❩ ❪❫❩✭▼❨❴❛❵ ❜✖❩◗❚❝◆❳▼❄❞❡▼❣❢❤◆❝✐❄❥✬❩✧❦❬❴❛❚❧❑ ♠❨❦❬❴◗❚❬♥✱◆❄❘❯❑ ❴❛♠ ❢❤◆❝✐❆❥✖❩✧❘✌❚✮◆✬❜✬❩◗❚✮▼❨❩✭▼♦❘✌❥✖❩♣❋q●r■☎❖❳❩❛❵ ❩✭s✭◆✬❘❯❑ ❴❛♠ ❘✌❚❭❩❳❩t❘❬❴✧❦✌❑ ♠✬❖t✉✥❲❨❘✘❥✖❴◗❚✘❑ ❘❭◆✬❘✌❑ ❜✬❩✓♠✬◆❛♥☛❩✭▼❨❩◗❚✈❜✖❩◗❚ ✇ ❥❝❑ ✐❄❥✩❥✬◆❳▼♦❘✌❥✬❩♣❑ ♠①❦❬❴◗❚❬♥✱◆✬❘✌❑ ❴❛♠P❚❭❩✭②❛❲✖❩✭▼❙❘❬❩✭❖ ③❧◆❳❖P✐❨❴❛♠①❦❯❑ s❝❲❝❚✮◆❄❘❯❑ ❴❛♠✱❴❄❦❛◆◗❲❨❘✌❥✬❴◗❚✌❑ ❘❭◆✬❘❯❑ ❜✖❩ ▼❨❩◗❚✈❜✖❩❛❚✮▼❣✐①◆❛♠✜❚❭❩✖▼✬❲✭❵ ❘④❑ ♠P❱❳❚❭❴❛❞❡❩❛♠✧❖❝❴❛♥✧◆⑤❑ ♠✬▼

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✂✁☎✄⑥❇⑦✝☛❊✜⑧⑨✡✌✳✴✢✥✤✖✡✌☞✎✍ ⑩❛❴❛❚◗❩❄❜✬❩◗❚❷❶✧❖❳❴❛♥✱◆◗❑ ♠◗❸ ✇ ❩✜♠✖❩❳❩✖❖♣♥✱❴◗❚❭❩t❘✌❥✬◆❛♠ ❴❛♠✖❩☛◆◗❲❨❘✘❥✖❴◗❚✘❑ ❘❭◆✬❘✌❑ ❜✬❩✓♠✬◆❛♥☛❩✭▼❨❩◗❚✈❜✖❩❛❚ ✇ ❑ ❘✌❥❉❘✌❥✖❩ ▼❨◆❛♥☛❩♣❑ ♠❨❦❬❴❛❚✘♥✱◆❄❘❯❑ ❴❝♠✎❹✘❪❤⑩❛❢✂❺④❻①❼✭❺✖❽ ❋r◆❄❘❭◆✎❑ ▼t❩❝♠❨❘❬❩❛❚❭❩✭❖♣❑ ♠✱❴❛♠✖❩☛▼❆❩❛❚❷❜✖❩❛❚❾❹❭❿t◆❳▼❙❘❬❩◗❚❷❽ ◆◗♠✬❖♣❚❭❩❛➀✭❵➁❑ ✐①◆✬❘❭❩✭❖✱❘❭❴✧❘✌❥✬❩P❴❄❘✘❥✖❩◗❚✮▼P❹❷■❏❵ ◆❄❜✖❩➂❹❷▼✣❽✘❽ ➃ ❲①❘❭▼✖❑ ❖❝❩ ✇ ❴◗❚❬❵ ❖P✐①◆❛♠❳♠✖❴❄❘✭❘❬❩❛❵ ❵✻❘✌❥✬❩✩❖◗❑ ❦➄❦❬❩❛❚❭❩❛♠✬✐❨❩ ❱✖❩❄❘ ✇ ❩❳❩❝♠P♥✧◆❳▼❡❘❭❩◗❚❛◆❛♠✬❖✩▼✬❵ ◆✬❜✖❩ ➅➂➆✜➇❷➈❡➉➋➊❆➇❷➌✣➍r➎❆➇❷➈✴➇❷➈✻➏✮➐①➇✸➑❙➈❡➌✠➒ ➑✥➇✈➎❆➑✲➌①➊❆➓☎➊❄➇✈➌①➈❨➇ ➔ ➊❄➇❆➈❡→❆➐❙➎❆➣✿➣ ➊✣➎①➌q➍❙↔✲➎❆➇✸➒ ➑✲↕ ➙▲◆❳▼❣✐①◆❛❵➛❵ ❩✖❖✎➜❯➀❳❚✌❑ ♥✱◆⑤❚❷❶❳➜◗◆◗♠✬❖♣➜❬▼❆❩✭✐❨❴❝♠✬❖❳◆◗❚➄❶✭➜

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✄▲⑧✘✢q✯✧✝❉✟➝✳✠☞✎✍P✍✧✝❉✳q✤P✤①☞➟➞➠✢✠✟✥✤✣✝✱✛✜✤①☞ ✛✣✝♦✤✬✛✖✡✘✝✥✯✧✝➝✳✠☞✎❊❉➡✦☞✧✕✜➢❍☞✎✍t✝➥➤✩✢✥✤✣✢ ➦➂✹➨➧➫➩❷❁✻✶ ❃❆❀ ✹➫➭➋❁ ❃❄❀ ✹➫➭➋❁ ➯❨➲➫➳❾➵⑤➸➻➺➽➼➾➳➋➚✿➪✿➶➨➳➨➺❧➹➫➶⑨➼ ➘✈➴➻➷➬➺➫➲➨➘✻➪➻➸➫➼➛➸❧➼➁➶⑤➼✈➲➬➳④➺➫➮ ➸➫➱➫➳➨➺

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✃❐✫t✝✱✍✦➤✜☞✩✝✠✟❒✛①✝✱❊✜⑧⑨✡❯✳✴✢✥✤✖✡✌☞✎✍➝✤✣✢✱❮❍✝ ❊✜⑧✘✢❉✳✴✝☛❰ ■r❵ ◆✬❜✬❩✭▼✧➀✖❴❝❵➛❵➋❘✌❥✖❩✜♥✱◆❳▼❙❘❬❩◗❚⑤➀✖❩❛❚✌❑ ❴✖❖⑤❑ ✐✣◆◗❵ ❵ ❶✧Ï ✐✣◆◗❵ ❵ ❩✭❖✧❘✌❥✖❩✓➜Ð❪r❩❆❦❯❚❭❩✖▼✬❥✓ÑÒ♠❨❘❬❩❛❚❷❜❄◆◗❵➁➜⑤Ï❛❘❬❴✩✐❄❥✬❩❳✐❄❞ ❦❬❴❛❚➂♠✖❩ ✇ ❖✭◆✬❘❭◆ Ó ➇✸➒ ↕❄➒ ➑❙➎❆➣ ➣ Ôr➏✮↔✣➒ ➍✽ÕÖ➎✣➍✽➏✮↔❙➈q➊❆➑✣➣ Ô✥➓❤➈❡➉❙↔✲➎❄➑✣➒ ➍❙➓ ➙×❑ ❘✘❥P♠✖❩ ✇ ▼❨❴❄❦➄❘ ✇ ◆⑤❚✮❩➂❸✬♥✧◆❳▼❙❘❬❩◗❚❛✐①◆❛♠✱◆◗❵ ▼❆❴ ♠✬❴❄❘❯❑ ❦✸❶❉❘✘❥✖❩✩▼❄❵ ◆❄❜✖❩✖▼ ✇ ❥✖❩❛♠❉❘✌❥✖❩☛❖❳◆❄❘❭◆✜✐❆❥✬◆◗♠✬s❳❩✭▼ Ø◗➈✣➍❙➐✣➣ ➏➄➍Ù➒ ➑Ù→❄➐✣➒ ➉✲Ú➻➈❨➇✖➐✣Û✲➌✣➎❙➏➄➈❡➍ Ü✽❥✖❩✜♠✖❴❄❘❯❑ ❦❯❑ ✐✣◆✬❘❯❑ ❴❛♠P❑ ▼✧❲❳♠❳❚❭❩❛❵➛❑ ◆◗❱✭❵ ❩✚❹➄❩➂Ý➁s⑤Ý ♠✬❩❄❘ ✇ ❴◗❚✘❞❉♥✜❑ s❛❥❨❘➂❵ ❴✖▼❆❩☛◆♣➀✬◆❳✐❄❞❡❩❄❘✸❽④▼❆❴ ✇ ❩☛▼❡❘✌❑ ❵➛❵ ♠✬❩❳❩✭❖P✐❄❥✬❩❳✐❄❞❙▼❉◆✬❘❳❘✘❥✖❩✚❪❫❩❄❦❯❚✮❩✭▼❄❥♣ÑÒ♠①❘❬❩◗❚❷❜❄◆◗❵

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✄✞✝✱✛✭✡✘✢☛⑧✠✁✂✙P✰ßÞt✝✱✛①✟ à◗❜✖❩◗❚❷❶❣á❄❴❛♠✬❩✧❦❯❑ ❵ ❩✜❥✬◆❳▼❉◆✜■Ö❩◗❚✌❑ ◆◗❵❆●❤❲✭♥P❱✖❩❛❚ ■r❵ ◆✬❜✬❩ ✇ ❑ ❵ ❵✣❴❝♠❳❵ ❶✧✐①❴❛➀❆❶t❖❳◆❄❘❭◆ ✇ ❥✖❩❛♠❉❘✌❥❝❑ ▼ ♠✭❲❳♥P❱✖❩❛❚âÑ❷●❏❢✠❪❍à❛✉❍■❤àâ■ ã✭➈❆➇✸➒ ➊✣➌❆➒ ➉❍äâå④ãt→❄➐❙➈❨➇➁Ôr➏❷➊✥➉❙↔❙➈❡➉❙ÚÖ➆◗➈❨➇✸➒ ➎❆➣ ➅❧➐①➓qæ❙➈❆➇ ç ➔ ➒ ➑✲➉❙➇❷➈❡➎✣➍✻➈✣➌✬è➨é❝êÖã✠➏✮➇✈➎❄➑✲➍ ➔ ➈❨➇❨➊ ➔❨ë ➊❆➑❙➈q➌✣➎✲➏❷➎ Ñ ❘❧❑ ▼✴❶❄❴❛❲❝❚➂❚❭❩✭▼❄➀✖❴❝♠✬▼✬❑ ❱❝❑ ❵➁❑ ❘✸❶✠❘❬❴♣❑ ♠✖✐❄❚❭❩✭◆✭▼❆❩t❘✌❥✖❩ ▼❨❩◗❚✘❑ ◆◗❵①♠❳❲❳♥✩❱✖❩❛❚❛◆✬❦❷❘❬❩◗❚❛❩❄❜✖❩❛❚➄❶✧✐❄❥❄◆◗♠✖s✭❩➂❸ ❴❆❘✌❥✖❩◗❚ ✇ ❑ ▼❆❩☛▼✬❵ ◆✬❜✬❩✭▼❉◆◗♠✬❖✓♥✱◆❳▼❙❘❬❩❛❚ ✇ ❑ ❵➛❵①❱✖❩ ❑ ♠✖✐①❴❛♠✬▼✬❑ ▼❙❘❬❩❛♠①❘

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6

SLIDE 2 ❇⑦✝❉✳❉☞✎✰ß✰✑✝☛✍✧➤✩✝❉➤ ✟❉✝✱✛✖✡✌✢☛⑧✴✍P✙P✰ Þt✝✱✛ ✕①☞✎✛✬✰✑✢♦✤❝✒✂✁✄✁☎✁✄✁ ➞ ➞➝

✁ ✆✝✆✝✆✞✆✠✟☛❶❄❩✭◆⑤❚ ❿P❿✡✟♣♥✱❴❛♠❨❘✌❥♣❹☞☛❧❻❨Ï➬❻✣❺✖❽ ❋q❋✌✟P❖✭◆✖❶✓❹☞☛④❻❨Ï✎✍â❻❡❽

q●✌✟♣♠✭❲❳♥P❱✬❩◗❚◗❴❆❦⑤✐❆❥✬◆◗♠✬s❳❩✭▼♦❘❬❴✭❖✭◆✖❶✓❹☞☛✏☛❳Ï✒✑✏✑✬❽

➈✔✓ ↕✕✓❙➒ ➔ Ô❙➊❆➐Ù➉❙↔✲➎❄➑✲↕①➈❏➏❭↔❙➈ ➔ ➒ ➣ ➈❍➊❆➑✗✖❄➇✈➌✙✘Ù➎❆➇✈➉❙↔ ✚✜✛✢✛✤✣ è➨➏✮↔❡➈❍➍✻➈❨➇✸➒ ➎❆➣➋➑✣➐✣➓✥æ❙➈❨➇✣Õr➒ ➣ ➣✿æ❡➈ ✚✜✛✢✛✤✣✢✛ ✖ ✛ ✖ ✛✜✛ ✓①ç ➔ Ô❙➊❆➐Ù➉❙↔✲➎❆➑❙↕①➈♦➒ ➏❆➎✣↕①➎❆➒ ➑❤➊❆➑❫➏✮↔❡➈ ➍➋➎❆➓❤➈q➌✣➎✲Ô❆è❙➒ ➏✣Õ❏➒ ➣ ➣➋æ❙➈ ✚✢✛✜✛✤✣✢✛ ✖ ✛ ✖ ✛✕✥

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7

✄ ✝✱✛✭✡✘✢☛⑧✠✁✂✙P✰ßÞ✧✝✱✛✣✟✜✒✩⑦✢✱✍t✗✜✝✱✛✧✦ Ñ ❦❳❶✬❴❝❲☛❩❄❜✬❩◗❚ ★✪✩✕✫✢✬✭✩✯✮✏✰✔✩ ❘✌❥✖❩☛▼❆❩❛❚✌❑ ◆◗❵❨♠✭❲❳♥P❱✬❩◗❚➽❸ ❘✌❥✬❩✩▼❄❵ ◆❄❜✖❩✭▼ ✇ ❑ ❵ ❵ ✱✲✩✴✳✤✩✕✬✶✵✜✷✶★✕✮✲✸☞✩✹✮✯✺✴✮✪✻ ✱ ❲❳♠①❘❯❑ ❵ ❘✌❥✬❩✩▼❨❩◗❚✘❑ ◆◗❵①♠❳❲✭♥P❱✖❩❛❚◗s❳❴✭❩✭▼❉◆◗❱✖❴❆❜✖❩✓❑ ❘❭▼ ➀❳❚❭❩❄❜❳❑ ❴❝❲✬▼♦❜✬◆❛❵➛❲✖❩ ❪❤⑩❛❢❉❻✢✑④❻✣❺P▼❨❩❳✐✲❘❯❑ ❴❛♠✼✍④Ý✸❻❉❩✔✽✭➀❳❵ ◆◗❑ ♠✬▼✧❥✬❴ ✇ ❘❭❴✧❦❯❑ ✽ ❘✌❥❝❑ ▼✧➀❝❚❭❴❝❱❳❵ ❩❝♥ ✉❫❘ ✇ ❴❛❚✮▼❙❘ ❸✣❶❄❴❛❲✩❥✬◆✬❜✬❩✧❘❬❴✩✐❨❴❝♠❨❘❭◆❝✐✲❘◗◆❛❵➛❵✻❶✬❴❝❲❝❚ ▼❄❵ ◆❄❜✖❩✭▼❉◆❛♠✬❖✜s✭❩❄❘❳❘✘❥✖❩❛♥ ❘❬❴✩❖❳❩❛❵ ❩❆❘❬❩✧❘✘❥✖❩◗❑ ❚◗✐①❴❛➀❆❶ ❴❄❦✭❘✌❥✖❩✱á❄❴❛♠✬❩✩❖✭◆✬❘❭◆

➤ ➤ ➤

8

✄ ✝✱✛✭✡✘✢☛⑧✠✁✂✙P✰ßÞ✧✝✱✛✣✟✜✒✩⑦✢✱✍t✗✜✝✱✛✿✾ ■Ö❩◗❚✌❑ ◆◗❵①♠✖❴➂Ý✬❑ ▼❉◆❀✍❳❺❝Ï➽❱❳❑ ❘❧❲✭♠✬▼✬❑ s❛♠✬❩✭❖♣♠✭❲❳♥P❱✬❩◗❚ ❪Ö◆◗♠✖s✭❩❂❁❃☛✧❘❬❴❅❄❧❸➛❺✏✑❆❄❧❸❇✑✏❈✏❉➂❸➛❺✏✑❆❊ ✉q♠❆❶✠❜✬◆❛❵➛❲✖❩✜❵ ◆◗❚❭s❳❩❛❚✭❘✌❥❄◆◗♠❣❘✘❥❝❑ ▼✱❑ ▼❣▼✬❑ ❵ ❩❛♠❨❘✘❵ ❶ ❘✌❚✘❲❳♠✬✐①◆✬❘❭❩✭❖ ❩⑤Ý➁s➂Ý①❺✏☛✏☛✏❄❆☛❆✍✪☛✕✍✪☛✏☛❆☛✦❹✸♠✖❴❄❘❬❩✩❩✔✽①❘❯❚✮◆✩❖⑤❑ s❛❑ ❘✸❽ ❋ ✣❍●✲●✶■✔❏ ê ✥▲❑✜▼❖◆ ↔❙➈◗P▲❘ ❋

✲●❙■❚❏

ê ✥▲❑✜▼❖◆ ✖ ✚ æ①➒ ➏➄➍❯❘ ❋ ✚✜▼✜❱✜✛✤✣ ✖✜✖ ▼✕✥❲❱ Ñ ❦❝❶❄❴❛❲P♥✧◆◗❞❡❩✧❘✌❥❳❑ ▼✧♥✜❑ ▼❡❘❭◆❛❞✣❩⑤❸❡❘✌❥✖❩❝♠☛✐①❴◗❚✘❚❭❩❳✐✲❘④❑ ❘ ❸ ❘✘❥✖❩✩▼❨❩◗❚✘❑ ◆◗❵①♠❳❲✭♥P❱✖❩❛❚ ✇ ❑ ❵ ❵❨❥❄◆✬❜✖❩☛❖❝❩❳✐❄❚❭❩✖◆❳▼❨❩✭❖

➤ ➤ ➤ ➤

➝ ➝ ➝

➤

9

✔ ☞✎✍❉✕✖✡✘✗✚✙P✛①✢✥✤✖✡✌☞✎✍❒☞✧✕⑦➞➠✢✠✟✥✤①✝✱✛ ❳ ❩❄❘❬✐ ❳ ♠✬◆❛♥☛❩✭❖❛❱ ❳ ♠✬◆❛♥☛❩✭❖➂Ý➁✐①❴❛♠❨❦➂➀✖❴◗❑ ♠❨❘❭▼♦❘❬❴ á❄❴❛♠✬❩ ❦❯❑ ❵ ❩ ❹✮♥✧◆◗♠❳❲❄◆◗❵➛❵ ❶✧✐✬❚✮❩✭◆✬❘❬❩✖❖✖❽ ❢♦❥✖❴✭❴✭▼❨❩✩◆✓❵ ❴❳s❛❑ ✐✣◆◗❵①➀❳❵ ◆❳✐❨❩t❘❬❴✓❞❡❩❳❩❝➀❣❘✌❥✖❩❝♥ ➈✯✓ ↕✯✓❩❨✮➈✲➏❷➉❩❨❬➑✲➎❆➓❍➈❡➌❆æ❬❨✘➓Ù➎✣➍➨➏➄➈❨➇❇❨✈➏✮➒ ➍➋➉➋➎❆➣ ➒ ✓ ➉➋➊✯✓➛➐✣Ú ➊❄➇❍❨✮➈✻➏➄➉❭❨❬➑❙➎❆➓❤➈✣➌▲❨❬➓Ù➎①➍➫➏✸➈❨➇ ❨❬➐✣Ú❍✓ ➉➋➊✯✓ ➏✮➒ ➍➋➉➋➎❆➣ ➒

➤ ➤

➝ ➝

zone "example.com" { type master; file "master/example.com"; allow-transfer { 192.188.58.126; 192.188.58.2; }; };

10

✔ ☞✎✍✠✕✭✡✘✗✚✙P✛①✢✥✤✖✡✌☞✎✍✦☞✱✕✎✄ ⑧✘✢✥✯✧✝ ♠✬◆❛♥☛❩✭❖➂Ý➁✐❨❴❝♠❨❦❧➀✬❴◗❑ ♠①❘❭▼♦❘❬❴✚Ñ☞❪ ◆❳❖✭❖⑤❚❭❩✭▼①▼❣❴❄❦ ♥✱◆✭▼❡❘❬❩❛❚❛◆❛♠✬❖♣❵ ❴❳✐✣◆✬❘❯❑ ❴❛♠✱❴❄❦❛á❆❴❛♠✖❩t❦❯❑ ❵ ❩ ❫④❴❝♠✖❩t❦❯❑ ❵ ❩✭▼❉◆⑤❚❭❩t❘❯❚✮◆❛♠✬▼❙❦❬❩◗❚✌❚✮❩✭❖✩◆◗❲❨❘❬❴❝♥✱◆❄❘❯❑ ✐✣◆◗❵➛❵ ❶ å⑤➊❆➑✤❴ ➏✣➏➄➊❆➐✲➉❙↔❫➏✮↔❡➈❨➓

➤ ➤

➝

zone "example.com" { type slave; masters { 192.188.58.126; }; file "slave/example.com"; allow-transfer { none; }; };

11

➞➠✢✠✟✥✤✣✝✱✛✎✢✱✍✱➤ß✄▲⑧✘✢q✯✧✝ Ñ ❘❛❵ ▼✧➀✖❩❛❚❷❦❬❩✭✐❙❘✌❵ ❶ ➃❝❜ ❦❬❴◗❚❛❴❛♠✖❩☛▼❆❩❛❚❷❜✖❩❛❚✭❘❬❴✜❱✖❩ ❿t◆❳▼❙❘❬❩◗❚✖❦❬❴◗❚❝▼❆❴❝♥☛❩✱á❄❴❝♠✖❩✭▼❉◆◗♠❄❖✜■❏❵ ◆✬❜✬❩✧❦❬❴❛❚ ❴❄❘✌❥✖❩❛❚✮▼ ÜÖ❥✬◆❄❘❛❵ ▼ ✇ ❥❆❶ ✇ ❩✓❚❭❩❳✐①❴❛♥✩♥☛❩❛♠❄❖♣❞❡❩❳❩❛➀❳❑ ♠✖st❘✌❥✖❩ ❦❯❑ ❵ ❩✭▼✱❑ ♠✧❖⑤❑ ❦❷❦❬❩◗❚❭❩❝♠❨❘◗❖◗❑➛❚❭❩✭✐❙❘❭❴◗❚✌❑ ❩✭▼ ❨❭➈✻➏❷➉❩❨❬➑✲➎❆➓❍➈❡➌❆æ❬❨✘➓Ù➎✣➍➨➏➄➈❨➇❇❨ ❨❭➈✻➏❷➉❩❨❬➑✲➎❆➓❍➈❡➌❆æ❬❨✸➍❙➣ ➎❍❞❡➈❲❨ ❡ ❢❲❣ ❤❩✐❯❥◗❦ ❧❲♠❂❤❩❣ ❢❍♥♦♠✶♣❬q rs♠✉t❭❦ ✐❬r ✈✶t♦❢❲✇✶❧❬❢❍♥♦♠❂❢❩①✉①❍r②✐③①❍r②q ❢◗❦ ♠ ①④♠❬r⑥⑤❙q ❤③❤❩q ✐❬✇❬❤✴❤❩✐⑦❦ ❧❬❢◗❦❩✇❬❢❲⑤❙♠✉♣⑧q ❦ ❤❩♠❬❣ ⑨❬t♦❢❲✇✞⑩❃r②q ❦ ♠❙❦ ✐✶q ❦ ❶

➤ ➤

➝ ➝

➝

12

SLIDE 3 ✢☛⑧⑨⑧✌☞✁✄✂✿✤✬✛✣✢✱✍✧✟✥✕✣✝✱✛✆☎✞✝✟✝✟✝✡✠ ❪❫❩❛♥✱❴❄❘❬❩✜♥✱◆❝✐❆❥❝❑ ♠✖❩✭▼❣✐✣◆◗♠✜❚✮❩✭②◗❲✬❩✭▼❙❘◗◆ ❘✌❚✮◆◗♠❄▼❡❦❬❩❛❚◗❴❄❦✭❘✌❥✖❩✩❩❛♠❨❘✌❑➛❚❭❩✱á❄❴❝♠✖❩P✐①❴❛♠①❘❬❩❛♠❨❘✮▼ ③⑤❶✧❖❳❩❄❦❭◆❛❲❳❵ ❘ ❸❙❘✌❥❝❑ ▼☛❑ ▼✧➀✖❩◗❚❬♥✜❑ ❘❷❘❬❩✭❖✧❘❬❴✩◆❛♠❆❶✬❴❝♠✖❩ ③④❩❄❘➄❘❬❩❛❚✭❘❬❴✓❚❭❩✭▼❙❘❯❚✘❑ ✐✲❘❳❘✌❥❝❑ ▼ ✆❤❴❛❲✱✐①◆◗♠✧▼❆❩❆❘◗◆Ps❛❵ ❴❝❱✬◆◗❵❙❖❝❩❄❦✮◆◗❲❳❵ ❘ ❸❨◆◗♠❄❖ ❴❆❜✖❩❛❚✌❚✌❑ ❖❝❩t❘✌❥❝❑ ▼♦❦❬❴❛❚◗❩✖◆❝✐❄❥tá❄❴❝♠✖❩✓❑ ❦④❚✮❩✭②◗❲❳❑➛❚❭❩✖❖

➤ ➤ ➤ ➤

ptions {

allow-transfer { 127.0.0.1; }; };

13

✄✚✤✬✛✬✙✧✳✥✤✬✙P✛✣✝➥☞✧✕♣✢ ➢❍☞✎✍t✝ ✕✖✡➬⑧✘✝ ☛ ❵ ❴❛❱✬◆◗❵❡❴❛➀①❘❯❑ ❴❝♠✬▼ ☞ é✬é✍✌ ✥ ➌ ➆❛➈✲➏❷➍✽➏✮↔❙➈❍➌❨➈ ➔ ➎❆➐✣➣ ➏✣é✖é✍✌ ➔ ➊❆➇❨➎❆➣ ➣➨➊✲➏✮↔❙➈❆➇✬➇❷➈✣➉✿➊❄➇✈➌✣➍ ■ ➃ ✉ ❪❍❪ ✎✸➆✭➏❷➎❆➇➁➏ Ó❾➔

➐✿➏✮↔✲➊❄➇✸➒

➏➾Ô✏✎ ✑◗➊❄➐✲➍✻➈❨Ú➻➈✣➈❨Û✣➒ ➑✲↕✠➒ ➑ ➔ ➊❆➇✸➓Ù➎❙➏✮➒ ➊❄➑ ➔ ➊❆➇✣➏✮↔❙➈ ë ➊❆➑❙➈

r■

❪❍❪❫▼ ✌❡➒ ➍➨➏❆➎❄➣ ➣⑨➏✮↔❡➈♦➑✲➎❆➓❍➈❡➍✻➈❨➇ ❞❡➈❨➇❷➍ ➔ ➊❆➇❡➏✮↔❡➈ ë ➊❆➑❙➈✬è ➓Ù➎✣➍➨➏➄➈❨➇❆➎❆➑✲➌✥➍✲➣ ➎❍❞❡➈❡➍ ➃ ❘✌❥✖❩❛❚â❪❍❪❫▼ é◗↔❙➈❍➎①➉➫➏❭➐✲➎❆➣➨➌✣➎✲➏❷➎❤Ô❙➊❆➐❫Õ❏➒ ➍✲↔r➏❷➊✴Û✣➐①æ✣➣ ➒ ➍❙↔

➤

➝ ➝

➤

➝ ➝

➤

➝

➤

➝

14

✒❣☞✎✛✖✰✑✢✥✤✎☞✱✕♣✢ ❇❈✝✠✟❉☞✎✙P✛❨✳✴✝ ❇❈✝❉✳❉☞✎✛①➤ ➃ ♠✖❩✜➀✖❩◗❚⑤❵➁❑ ♠✖❩ ❹❷❩✔✽✖✐①❩❛➀①❘⑤■ ➃ ✉ ✐✣◆◗♠✱❩✔✽❨❘❭❩❛♠✬❖ ❴❄❜✬❩◗❚❝▼❨❩❄❜✖❩❛❚✮◆◗❵①❵➁❑ ♠✖❩✖▼✣❽ Ñ ❦❳❶✬❴❝❲☛❴❛♥P❑ ❘❳❘✘❥✖❩✎❋r❴❛♥✧◆⑤❑ ♠✜●r◆❛♥☛❩➂❸✬❑ ❘④❑ ▼♦❘✌❥✖❩ ▼①◆◗♥☛❩☛◆❳▼♦❘✌❥✬❩✓➀❝❚✮❩❄❜❳❑ ❴❛❲❄▼✱❵➛❑ ♠✬❩ Ü➂Ü✔✓❣▼✬❥✖❴❛❚❷❘❬✐❆❲❨❘❭▼❆❁❆❩✭s➂Ý❃❈❆☛❳▼❳❸✜✍✪☛◗♥✓❸❃❄❛❥◗❸❝❻ ✇ ❺❳❖ Ñ ❦❳❶✬❴❝❲☛❴❛♥P❑ ❘✭❘✌❥✖❩✧Ü❧Ü✔✓❳❸✖❑ ❘❳❘❭◆◗❞❡❩✭▼♦❘✌❥✖❩✖✕✖Ü➂Ü✔✓ ❖❝❩❆❦❭◆◗❲✭❵ ❘❳❜❄◆◗❵ ❲✖❩ Ñ ❦❳❶✬❴❝❲☛❴❛♥P❑ ❘❳❘✘❥✖❩P❢✥❵ ◆✭▼❨▼✭❸✖❑ ❘◗❖❝❩❄❦✮◆◗❲❳❵ ❘❭▼♦❘❬❴✚Ñ❷● Ü➂❶✭➀✖❩☛◆◗♠❄❖✚❋❫◆✬❘❭◆P✐①◆◗♠✭♠✖❴❄❘➂❱✖❩P❴❝♥✜❑ ❘➄❘❬❩✭❖ ❢❍❴❛♥P♥✱❩❛♠❨❘❭▼❉▼❙❘❭◆⑤❚❷❘ ✇ ❑ ❘✘❥☛■❤àÖ❿✜Ñ➁❢ ➃ ✓ ➃

❹✘✗

❽

➤ ➤ ➤ ➤ ➤ ➤ ➤

www 3600 IN A 212.74.112.80 Domain TTL Class Type Data

15

✄ ✫✧☞✎✛❙✤①✳✧✙✠✤✣✟ Ñ ❦✭❘✌❥✖❩♣❋❏❴❝♥✱◆⑤❑ ♠✓●❫◆◗♥☛❩☛❖❝❴❳❩✖▼✱♠✬❴❄❘⑤❩❝♠✬❖✎❑ ♠✱◆ ❖❳❴❄❘ ❸❡❘✘❥✖❩☛á❆❴❛♠✬❩✴❵ ▼❣❴ ✇ ♠✧❖❝❴❛♥✧◆⑤❑ ♠♣❹❭➜✘❴❛❚✌❑ s❛❑ ♠❝➜✸❽❫❑ ▼ ◆❛➀❳➀✖❩❝♠✬❖❝❩✭❖ ✉ ❋❏❴❝♥✱◆⑤❑ ♠✓●❫◆◗♥☛❩✩❴❄❦❧➜✚✙ ➜④♥☛❩✖◆◗♠✬▼♦❘✌❥✖❩ ❴❛❚✌❑ s❛❑ ♠P❑ ❘❭▼❨❩❛❵ ❦ ❩⑤Ý➁s➂Ý✖❑ ♠✧á❆❴❛♠✬❩✧❦❯❑ ❵ ❩t❦❬❴◗❚❛❩✔✽❄◆◗♥P➀✭❵ ❩➂Ý➛✐❨❴❛♥ ❁ ✛ ➓❍➈❡➎❆➑✲➍ ✜✣✢✥✤✧✦✩★✫✪ ✜✧✬ ✭✯✮✰✦✩✬ ÕâÕ④Õ✦➓❤➈❡➎❄➑✲➍ ✱✔✱✔✱✲✬ ✜✳✢✴✤✧✦✵★✥✪ ✜✧✬ ✭✏✮✶✦✩✬

➤ ➤ ➤

➝ ➝

16

✷❭✕P➡✧☞✎✙✸ ✛✖✡✮✤✣✝ ✤✬✫✜✡✘✟✹✝✟✝✟✝

$TTL 1d @ SOA ( ... ) NS ns0 NS ns0.as9105.net. ; Main webserver www A 212.74.112.80 MX 10 mail example.com. 86400 IN SOA ( ... ) example.com. 86400 IN NS ns0.example.com. example.com. 86400 IN NS ns0.as9105.net. www.example.com. 86400 IN A 212.74.112.80 www.example.com. 86400 IN MX 10 mail.example.com.

✝✟✝✟✝❉✡✮✤✞Þt✝❣✳✠☞✎✰✑✝✠✟ ✤✖✫✜✡✘✟

17

✒❣☞✚✛✬✰✑✢✥✤✚☞✧✕P✤✬✫t✝➝✄✻✺ ★ ✛①✝❉✳✠☞✎✛❨➤

$TTL 1d @ 1h IN SOA ns1.example.net. brian.nsrc.org. ( 2004030300 ; Serial 8h ; Refresh 1h ; Retry 4w ; Expire 1h ) ; Negative IN NS ns1.example.net. IN NS ns2.example.net. IN NS ns1.othernetwork.com.

18

SLIDE 4 ✒❣☞✎✛✖✰✑✢✥✤✚☞✧✕✎✄ ✺ ★ ✛✣✝❣✳✠☞✎✛①➤ ♠✬▼❳❻✭Ý➁❩❚✽✬◆❛♥P➀❳❵ ❩➂ÝÒ♠✬❩❄❘ ↔✲➊①➍➫➏❭➑✲➎❆➓❤➈q➊ ➔ ➓❤➎✣➍➨➏➄➈❨➇✬➑❙➎❆➓❤➈❡➍✻➈❨➇⑥❞❙➈❆➇ ❱❝❚✌❑ ◆◗♠❛ÝÒ♠✬▼✬❚❭✐✭Ý➛❴◗❚❭s⑤Ý ❏ ✁ ➓Ù➎❄➒ ➣➨➎✣➌①➌❆➇❷➈❡➍➋➍r➊ ➔ ➇❷➈❡➍❙Û✲➊❆➑❙➍✲➒ æ✣➣ ➈♦Û❡➈❨➇✈➍➋➊❆➑❨è➻Õr➒ ➏✮↔ ✎ ✛ ✎❄➉❙↔✲➎❆➑✲↕❨➈❡➌Ù➏❷➊✥➌✣➊✲➏ ■❫❩◗❚✘❑ ◆◗❵①♠❳❲✭♥P❱✖❩❛❚ ❪r❩❆❦❯❚❭❩✭▼❄❥✜❑ ♠❨❘❬❩❛❚❷❜❄◆◗❵ ✑⑤➊✲Õ ➊ ➔ ➏➄➈❨➑❤➆➂➣ ➎❍❞❡➈❍➉❙↔❙➈❡➉❙Ú➨➍r➍✻➈❨➇✸➒ ➎❆➣➋➑✣➐✣➓✥æ❙➈❨➇❆➊❆➑ ✘Ù➎✣➍➨➏➄➈❨➇ ❪r❩❆❘❯❚➄❶✩❑ ♠①❘❬❩◗❚❷❜❄◆◗❵ ✑⑤➊✲Õ ➊ ➔ ➏➄➈❨➑❤➆➂➣ ➎❍❞❡➈❍➉❙↔❙➈✣➉✲Ú➨➍r➍✻➈❨➇✸➒ ➎❆➣➋➑✣➐①➓qæ❙➈❨➇✖➒ ➔ ➏✮↔❡➈♦➓Ù➎✣➍➨➏➄➈❆➇❨➌❆➒ ➌✴➑✲➊❙➏✖➇❷➈❡➍❙Û✲➊❄➑✲➌

➤

➝

➤

➝

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➝

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➝

19

✒❣☞✎✛✖✰✑✢✥✤✚☞✧✕✎✄✻✺×★ ✛✣✝❣✳✠☞✎✛①➤✄✂➻✳✠☞✎✍✠✤✆☎ à ✽✭➀❝❑ ❚➄❶✠❘❯❑ ♥✱❩ ç ➔ ➏❭↔❙➈❍➍❙➣ ➎❍❞❡➈♦➒ ➍❤➐✣➑✲➎❆æ①➣ ➈Ù➏❷➊q➉➋➊❆➑➋➏❷➎✣➉➨➏✣➏✮↔❙➈✴➓Ù➎✣➍➨➏➄➈❆➇ ➔ ➊❆➇✣➏✮↔✣➒ ➍❤Û❙➈❨➇✮➒ ➊✣➌✥➊ ➔ ➏❭➒ ➓❍➈❄è❙➒ ➏✣Õ❏➒ ➣ ➣➨➌①➈❆➣ ➈✻➏✸➈♦➒ ➏❷➍r➉✿➊❄Û✿Ô ➊ ➔ ➏❭↔❙➈ ë ➊❆➑❙➈q➌✣➎✲➏❷➎

❏❩✭s✭◆✬❘✌❑

❜✬❩ ❳ ❿☛❑ ♠❳❑ ♥P❲✭♥ Ó ➣ ➌q➍➋➊ ➔ ➏➾ÕÖ➎❆➇➄➈♦➐✲➍✻➈❡➌❤➏✮↔✣➒ ➍❫➎①➍r➎✴➓q➒ ➑✣➒ ➓q➐①➓✄❞❙➎❆➣ ➐❙➈ ➊ ➔ ➏✮↔❙➈❏é✖é✍✌ ➅⑤➊✲Õ❈➒ ➏✖➒ ➍❤➐✲➍✻➈❡➌ ➔ ➊❄➇✬➑❙➈❡↕①➎✲➏✮➒ ❞❡➈❍➉➋➎✣➉❙↔✣➒ ➑✲↕✞✝ ➒ ➑✲➌❆➒ ➉➋➎✲➏➄➈❡➍❤↔✲➊❙Õ❈➣ ➊❆➑❙↕q➎q➉➋➎✣➉❙↔❙➈✴➓Ù➎✲Ô❤➍➨➏❷➊❆➇➄➈❏➏✮↔❙➈ ➑✲➊❄➑ ✁ ➈◗P①➒ ➍➫➏✸➈❨➑✲➉✻➈❍➊ ➔ ➎❉ØâØ ❪qÑs❪❫àâÏ❬❺✏☛❆✍♣❥✬◆❳▼✱❚❭❩✭✐❨❴❛♥✩♥☛❩❝♠✬❖❝❩✖❖✱❜❄◆◗❵➛❲✬❩✭▼ ↔✿➏➾➏❭Û✟✝ ❨⑥❨✈ÕâÕâÕ ✓➛➇✸➒ Û❙➈✔✓➛➑❡➈✻➏❇❨❬➇✸➒ Û❙➈▲❨✸➌✣➊✣➉➋➍❩❨✸➌❆➑❙➍ ✁ ➍✿➊①➎✯✓➛↔✿➏✮➓✥➣

➤

➝

➤

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20

✒❣☞✎✛✖✰✑✢✥✤✚☞✧✕⑦✁☎✄ ✛①✝❉✳✠☞✎✛❨➤✩✟ ✓✖❑ ▼❙❘◗◆◗❵ ❵❡◆❛❲❨❘✌❥✖❴❛❚✌❑ ❘✮◆✬❘❯❑ ❜✖❩✜♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚✮▼♦❦❬❴❛❚✭❘✌❥✬❩ á❄❴❝♠✖❩PÏ④♥✱◆✭▼❡❘❬❩❛❚❛◆❛♠✬❖P▼❄❵ ◆❄❜✖❩➂❹❷▼✣❽ ❿✱❲✬▼❡❘➂➀✖❴◗❑ ♠❨❘❳❘❬❴✡✠ ➃ ■❾Ü❫●❾✉✴❿✩à❈♠✖❴❆❘❾Ñ☞❪ ◆✭❖❳❖⑤❚✮❩✭▼❨▼

➤ ➤

$TTL 1d @ 1h IN SOA ns1.example.net. brian.nsrc.org. ( 2004030300 ; Serial 8h ; Refresh 1h ; Retry 4w ; Expire 1h ) ; Negative IN NS ns1.example.net. IN NS ns2.example.net. IN NS ns1.othernetwork.com.

21

✒❣☞✎✛✖✰✑✢✥✤✚☞✧✕✎☞✧✤✬✫t✝☛✛❈❇ ❇⑦✟ Ñ❷●❒✉ ❻✖Ý➛❺❧Ý ✍❧Ý❇❄ Ñ❷●➟❿☞☛ ❻✢☛✓♥✱◆⑤❑ ❵➛❥✬❴✭▼❡❘➽Ý➁❩✔✽❄◆◗♥P➀✭❵ ❩➂Ý➛✐❨❴❛♥✓Ý é◗↔❡➈♦➑✣➐✣➓✥æ❙➈❨➇✖➒ ➍r➎ ✎❬Û✣➇❷➈ ➔ ➈❆➇❷➈❨➑✲➉✻➈✗❞✲➎❄➣ ➐❙➈✧✎✒✓✤✘❏➎❄➒ ➣➋➒ ➍ ➌①➈❆➣ ➒ ❞❡➈❨➇❷➈✣➌Ù➏❷➊Ù➏❭↔❙➈♦➣ ➊✲Õ❫➈❡➍➨➏ ✁ ➑①➐✣➓qæ❡➈❨➇✕✘✍✌ ➔ ➒ ➇✈➍➨➏ ✘❍➐❙➍➨➏✖Û✲➊❆➒ ➑✿➏①➏❷➊ ✑ Ó ➆✭é⑤➅

❏ ➑✲➊❙➏❳ç➁ãt➎✣➌✣➌❄➇❷➈❡➍➋➍ Ñ❷● ❢✠●â✉✴❿✩à ❥✬❴✭▼❡❘ Ý➛❩✔✽✬◆❛♥P➀❳❵ ❩➂Ý➁✐①❴❛♥✓Ý Ñ❷● ❪➂Ür❪ ❥✖❴✭▼❙❘ Ý➁❩✔✽❄◆◗♥✩➀❳❵ ❩⑤Ý➁✐❨❴❝♥♣Ý Ñ❷● Ü✎☛❫Ü ➜❬◆◗♠❆❶✠❘❬❩❚✽❨❘❝❶❄❴❛❲✩❵➁❑ ❞✣❩◗➜

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22

✃ ✫t✝✱✍➝➡✧☞✎✙ß✫✧✢q✯✧✝ ✢❣➤P➤✩✝❉➤ ☞✎✛ ✳✧✫t✢☛✍t✗P✝❉➤ ✢ ➢❤☞✚✍t✝ ✕✖✡⑨⑧✘✝✓✒ ❢♦❥✬❩❳✐❆❞q❘✌❥✬❩✩▼❨❩◗❚✌❑ ◆◗❵①♠❳❲❳♥✩❱✖❩◗❚✑✏

named-checkzone example.com /etc/namedb/master/example.com

æ✣➒ ➑✲➌ ❑ ➔ ➈❡➎✲➏❭➐✣➇❷➈ ➇❷➈❆Û✲➊❆➇➁➏➄➍r➍➫Ô①➑✿➏➄➎❍P❍➈❨➇✸➇❷➊❆➇✈➍✓✒➋➉➋➊❆➇✸➇➄➈❡➉➨➏✣➏✮↔❙➈❆➓✕✔

rndc reload

➊❆➇✖✝❙➇✸➑✲➌✣➉❤➇➄➈❨➣ ➊①➎✣➌✥➈❍P✲➎❄➓qÛ✣➣ ➈✔✓ ➉➋➊❆➓

tail /var/log/messages ➤ ➤

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✗✞✫t✝✠✟✠✝➥✳✧✫t✝❉✳✧❮q✟ ✢✱✛①✝✙✘♣✄✞✄✚✘ ✁✛✗ ✷✮★✢✜ Ñ ❦❝❶❄❴❛❲✩❥✬◆✬❜✬❩✩◆❛♠☛❩❛❚✌❚❭❴❛❚❧❑ ♠P♠✬◆❛♥☛❩✭❖➂Ý➁✐❨❴❝♠❨❦⑤❴❛❚❛◆ á❆❴❛♠✖❩t❦❯❑ ❵ ❩➂❸✬♠❄◆◗♥☛❩✖❖ ✇ ❑ ❵ ❵✣✐①❴❛♠❨❘❯❑ ♠❳❲✖❩t❘❬❴✓❚✘❲❳♠✩❱❳❲❨❘ ♠✖❴❆❘◗◆◗❲①❘✌❥✖❴◗❚✘❑ ❘❭◆❄❘❯❑ ❜✬❩✧❦❬❴❛❚✭❘✌❥✬❩✓❱❄◆❳❖✩á❆❴❛♠✖❩➂❹❷▼❡❽ ✆❍❴❝❲ ✇ ❑ ❵➛❵①❱✖❩✜❵ ◆❛♥☛❩✧❦❭❴◗❚✭❘✘❥✖❩☛á❆❴❛♠✬❩ ✇ ❑ ❘✌❥✖❴❝❲❨❘ ❚❭❩✖◆◗❵➁❑ ▼✖❑ ♠✖s✓❑ ❘ ■❏❵ ◆✬❜✬❩✭▼ ✇ ❑ ❵➛❵①♠✖❴❄❘➂❱✖❩✩◆❛❱❳❵ ❩t❘❬❴P✐①❴❛♠①❘❭◆❝✐✲❘❳❘✌❥✖❩ ♥✱◆✭▼❡❘❬❩❛❚ à⑤❜✬❩❛♠❨❘✘❲✬◆◗❵ ❵ ❶✓❹➄❩⑤Ý➁s➂Ý❃❄ ✇ ❩✭❩❛❞❙▼✱❵ ◆✬❘❬❩◗❚❷❽➂❘✘❥✖❩ ▼❄❵ ◆✬❜✬❩✭▼ ✇ ❑ ❵➛❵❡❩✔✽✭➀❝❑ ❚❭❩✧❘✘❥✖❩☛á❆❴❛♠✬❩ ✆❍❴❝❲❝❚❛❖❳❴❛♥✱◆◗❑ ♠ ✇ ❑ ❵➛❵❙▼❡❘❬❴❝➀ ✇ ❴◗❚✘❞❨❑ ♠✖s

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SLIDE 5 ✺ ✤✬✫t✝✱✛✚✳✧✫t✝❣✳✧❮❍✟ ➡✧☞✚✙✦✳✴✢✱✍❒➤P☞ ❖⑤❑ s✁◗♠✬❴◗❚❭❩✭✐ ✙ ✽◗Ý ✽❛Ý ✽❛Ý ✽✱❩✔✽✬◆❛♥P➀✭❵ ❩➂Ý➛✐❨❴❛♥✓Ý❨▼❨❴✭◆ ê✽↔❙➈❡➉❙Ú④➏✮↔❡➈

✲●

➔ ➣ ➎①↕ ê✽↔❙➈❡➉❙Ú④➏✮↔❙➈✴➓Ù➎✣➍➨➏➄➈❆➇❨➎❆➑✲➌✥➎❆➣ ➣Ð➏❭↔❙➈❍➍❙➣ ➎❍❞❡➈❡➍ ê✽↔❙➈❡➉❙Ú④➏✮↔❙➈q➍✻➈❨➇✸➒ ➎❆➣➋➑✣➐✣➓✥æ❙➈❨➇✈➍❤➓❤➎✲➏❷➉❙↔ ❖⑤❑ s✆✙ ✽❛Ý ✽❛Ý ✽◗Ý ✽☛❩❚✽✬◆❛♥P➀❳❵ ❩➂Ý➁✐①❴❛♥✓Ý❨◆✯✽①❦❯❚ ✎

➐✿➏✮↔❙➊❆➇✸➒

➏➾Ôré◗➇✈➎❄➑✲➍ ➔ ➈❨➇ ✎ Ø⑤➈❡→❆➐❡➈❡➍➨➏❷➍r➎ ➔ ➐✣➣ ➣➨➉➋➊❆Û✿Ô❤➊ ➔ ➏✮↔❙➈ ë ➊❆➑❡➈❍➉➋➊❆➑✿➏➄➈❆➑✿➏❷➍ ➊❍❞❡➈❨➇✣é❝êÖã⑤è➋➎✣➍r➍❙➣ ➎❍❞❡➈❡➍r➌✣➊❤➏❷➊✴➓Ù➎①➍➨➏➄➈❨➇ é◗↔①➒ ➍✽Õ❏➒ ➣ ➣➨➊❆➑①➣ ÔrÕÖ➊❆➇✮Ú ➔ ➇✈➊❆➓ ç➁ãt➎✣➌✣➌❆➇➄➈❡➍➋➍✻➈❡➍❤➣ ➒ ➍➨➏➄➈❡➌ ➒ ➑❫➏✮↔❡➈❍➎❆➣ ➣ ➊✲Õ ✁ ➏✮➇✈➎❄➑✲➍ ➔ ➈❨➇✄✂ ✓⑥✓⑥✓ ☎❝➍➋➈✣➉➫➏❭➒ ➊❄➑

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✄⑦☞ ✍✧☞✁ ➡✧☞✚✙ß✫t✢q✯✧✝

☞✚✛✬❮❉✡Ð✍✧✗

✢☛✙✠✤✬✫✧☞✎✛✭✡✮✤✣✢✥✤✖✡✮✯✧✝❒✍t✢✱✰✦✝✠✟✠✝✱✛✲✯✧✝✱✛①✟✝✆ ③✽❲①❘④❚❭❩❝♥☛❩❛♥✩❱✖❩◗❚✖❘✌❥✬◆❄❘❧♠✖❴❛♠✬❩P❴❆❦❳❘✌❥❝❑ ▼ ✇ ❑ ❵ ❵ ✇ ❴◗❚❬❞ ❲✭♠❨❘❯❑ ❵✲❶❄❴❛❲✩❥✬◆✬❜✬❩ ★✏✩✟✞②✩❃✺✴✮ ✸②✻✡✠✕✱ ❦❯❚✮❴❛♥ ❘✘❥✖❩ ❖❝❴❝♥✱◆⑤❑ ♠✱◆❛❱✖❴❄❜✬❩ ÜÖ❥❄◆✬❘④❑ ▼❳❸❙❘✌❥✖❩✬❶☛➀❳❲①❘④❑ ♠✓●r■ ❚❭❩✭✐❨❴❛❚✮❖❳▼♦❦❬❴◗❚✭❶✬❴❝❲❝❚ ❖❝❴❝♥✱◆⑤❑ ♠◗❸✬➀✬❴◗❑ ♠❨❘❯❑ ♠✬s✩◆❄❘❝❶❄❴❛❲❝❚⑤♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚✸▼ ✆❍❴❝❲P❥✬◆❄❜✖❩☛◆◗❵ ▼❨❴✓➀✭❲❨❘â●r■ ❚✮❩❳✐❨❴❛❚✮❖❳▼ ✇ ❑ ❘✌❥❝❑ ♠❣❘✌❥✬❩ á❆❴❛♠✬❩✧❦❯❑ ❵ ❩ ÜÖ❥✬❩✧❘ ✇ ❴✩▼❨❩❄❘✮▼❣▼❄❥✖❴❝❲❳❵ ❖✓♥✱◆❄❘❬✐❄❥

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✗ ✺☞☛✙✗ ✘✞✁ ✘⑦❇✂❇ ✺ ❇☎✄ ✡Ð✍✦✢✱✙✠✤✬✫✧☞✎✛✭✡✮✤✣✢✥✤✭✡✸✯✧✝❒✍t✢☛✰✑✝✠✟✠✝✱✛✲✯✧✝✱✛①✟ ✉q❵➛❵❡❴❛➀✖❩❛❚✮◆✬❘❬❴❛❚✮▼❣❴❄❦◗◆❛❲❨❘✌❥✩♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚✸▼ ▼❄❥✖❴❛❲✭❵ ❖♣❚❭❩✭◆✭❖ ❪❍⑩❝❢ ❻✢✑④❻①❺ ê④➊❆➓q➓❤➊❆➑✥åâ➅➂➆ Ó Û❙➈❨➇✈➎❙➏✮➒ ➊❄➑✲➎❆➣➨➎❆➑✲➌ ê④➊❆➑ ➔ ➒ ↕❆➐✣➇❷➎✲➏✮➒ ➊❆➑ ❏ ➇✸➇✈➊❄➇✈➍ ■Ö❩❳❩✩◆❛❵ ▼❨❴✚❪❍⑩❝❢✂❺④❻❨❼✭❺ ➆❛➈❆➣ ➈✣➉➫➏✮➒ ➊❆➑❤➎❆➑✲➌ Ó Û❡➈❨➇✈➎✲➏✮➒ ➊❆➑❤➊ ➔ ➆◗➈❡➉➋➊❆➑✲➌①➎❆➇➁Ô åâ➅⑤➆✩➆◗➈❆➇ ❞❡➈❨➇✈➍

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✦ ✝q✄ ✝✱✛✭✡✘✢☛⑧✴✍✜✙P✰ßÞt✝✱✛✎✝✱✛✖✛①☞✎✛①✟ ⑩❛❴❛❚❭s❳❴❆❘❳❘❬❴✓❑ ♠✖✐❄❚❭❩❝♥☛❩❛♠①❘◗▼❨❩◗❚✌❑ ◆◗❵①♠❳❲❳♥✩❱✖❩◗❚ ÑÒ♠✖✐❄❚❭❩❝♥☛❩❛♠①❘❬❩✭❖✩▼❆❩◗❚✘❑ ◆❛❵❨♠❳❲✭♥P❱✬❩◗❚➽❸①◆◗♠✬❖✧❘✌❥✖❩❛♠ ❖❝❩❳✐❄❚❭❩❝♥☛❩❛♠①❘❬❩✭❖♣❑ ❘ ✌r▼❨❩✭❖✩▼❆❩❛❚✌❑ ◆❛❵❨♠❳❲✭♥P❱✬❩◗❚◗s❛❚❭❩✭◆❄❘❬❩◗❚✖❘✌❥✬◆◗♠✧❺✎✍❲✍❝❺ ÑÒ♥P➀❄◆❝✐✲❘ ❁ ➆➂➣ ➎④❞❙➈✣➍r➌✣➊✴➑✲➊❙➏✖➐✣Û✲➌①➎✲➏➄➈ ✘Ù➎✣➍➨➏➄➈❨➇❨➎❆➑❙➌q➍❙➣ ➎④❞❙➈✣➍❤↔✲➎❍❞❡➈♦➒ ➑✲➉➋➊❆➑✲➍❙➒ ➍➨➏➄➈❨➑✿➏❆➌①➎✲➏❷➎ ê④➎✣➉❙↔❙➈❡➍✽Õ❏➒ ➣ ➣➨➍➋➊❆➓❍➈✻➏✮➒ ➓❤➈❡➍r↕①➈✲➏✣➏✮↔❙➈✴➑❙➈✻Õ ➌✣➎❙➏❷➎ ➎❆➑❙➌q➍➋➊❆➓❤➈✲➏✮➒ ➓❍➈❡➍r➊❆➣ ➌ ✁ ➒ ➑✿➏➄➈❆➇✸➓q➒ ➏➾➏➄➈❨➑➋➏✖Û✣➇✈➊❄æ✣➣ ➈❆➓

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✾ ✝ ✔ ☞✎✰ß✰✦✝✱✍✠✤✣✟ ✡Ð✍➥➢❤☞✎✍t✝ ✕✖✡⑨⑧✘✝✠✟ ✟✥✤✣✢☛✛✲✤✖✡Ð✍✧✗✑✏✓✒✁✏❤✡Ð✍✧✟✥✤✣✝✠✢❉➤ ☞✧✕✔✏✖✕✗✏ ■❾❶✖♠❨❘❭◆✔✽☛❩❛❚✌❚❭❴❛❚❧❑ ♠✧á❆❴❛♠✖❩t❦❯❑ ❵ ❩ ❿t◆✭▼❡❘❬❩❛❚❧❑ ▼✱♠✬❴✓❵ ❴❛♠✖s❳❩❛❚❛◆❛❲❨❘✌❥✖❴❛❚✌❑ ❘❭◆✬❘❯❑ ❜✖❩t❦❬❴◗❚✖❘✌❥✖❩ á❄❴❝♠✖❩ ■❏❵ ◆✬❜✖❩✖▼t✐✣◆◗♠✭♠✖❴❄❘⑤✐❆❥✖❩✭✐❄❞✴■ ➃ ✉ ■❏❵ ◆✬❜✬❩✭▼❣❩❄❜✖❩❝♠❨❘✌❲❄◆◗❵➛❵ ❶✧❩✔✽❳➀❳❑➛❚✮❩✧❘✌❥✬❩☛á❆❴❛♠✖❩⑤❸❨◆◗♠❄❖ ❶✬❴❝❲❝❚❝❖❝❴❛♥✧◆⑤❑ ♠✧▼❡❘❭❴❛➀✬▼ ✇ ❴❛❚✘❞❨❑ ♠✖s✩❩❛♠①❘❯❑➛❚✮❩❛❵ ❶ ✌r▼❨❩ ❵ ♠✬◆❛♥☛❩✭❖❳Ï✌✐❆❥✖❩❳✐❆❞❙á❆❴❛♠✬❩✴❵ ✌r▼❨❩ ❵ ❘❭◆◗❑ ❵ ❳ ❜✬◆◗❚ ❳ ❵ ❴❳s ❳ ♥☛❩✭▼①▼①◆❝s❳❩✖▼✯❵

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29

✏✖✝ ✺ ✤✬✫✧✝✱✛♣✟♦➡P✍✠✤✣✢✙✘ ✝☛✛✬✛❨☞✎✛✣✟ ✡Ð✍➝➢❍☞✎✍t✝ ✕✖✡⑨⑧✘✝❉✟ ❩➂Ý➁s⑤Ý❆❴❛♥P❑ ❘➄❘✌❑ ♠✖st❘✌❥✖❩✜➀❝❚❭❩❆❦❬❩◗❚✮❩❛♠✖✐①❩✧❜❄◆◗❵ ❲✖❩✧❦✌❚❭❴❛♥ ❿☞☛×❚❭❩✭✐❨❴◗❚✸❖❳▼ ■Ö◆❛♥☛❩✓❑ ♥P➀❄◆❝✐✲❘

➤ ➤

30

SLIDE 6

✝❣➞

✡✘✟✠✟☛✡Ð✍✧✗❒✤✬✫t✝ ✤✬✛①✢☛✡⑨⑧⑨✡Ð✍✧✗ ➤P☞✧✤

; zone example.com. @ IN MX 10 mailhost.example.com becomes @ IN MX 10 mailhost.example.com.example.com. ; zone 2.0.192.in-addr.arpa. 1 IN PTR host.example.com becomes 1 IN PTR host.example.com.2.0.192.in-addr.arpa.

31

✁ ✝❉✁ ✄✆☞✎✛❈➞✄✂ ✛✣✝❉✳✠☞✚✛①➤✩✟❒❊✱☞✚✡Ð✍✠✤✖✡Ð✍t✗ ✤①☞ ✷ ☛ ✢❉➤P➤✎✛①✝✠✟✠✟ Ü✽❥✖❩✬❶☛♥✩❲✬▼❙❘❧➀✖❴◗❑ ♠❨❘✭❘❬❴✓❥✬❴✭▼❡❘✘♠✬◆◗♥✱❩✭▼❳❸❄♠✖❴❄❘âÑ☞❪ ◆✭❖❳❖⑤❚✮❩✭▼①▼❆❩✖▼ ✌Ù♠❨❦❬❴❛❚❷❘✌❲✭♠✬◆✬❘❬❩❝❵ ❶t◆✱❦❬❩ ✇ ♥✧◆⑤❑ ❵❡▼❨❩◗❚❷❜✬❩◗❚✸▼ ★ ✠ ◆❳✐❨✐①❩❛➀❨❘âÑ☞❪ ◆✭❖❳❖⑤❚✮❩✭▼①▼❆❩✭▼✱❑ ♠✓❿ ☛ ❚❭❩✭✐❨❴❛❚✮❖❳▼✭❸❨▼❨❴ ❶❄❴❛❲✩♥✱◆✖❶☛♠✬❴❄❘◗▼❨❩❳❩☛◆♣➀❝❚✮❴❛❱❳❵ ❩❛♥ ✇ ❑ ❘✌❥✱◆❛❵➛❵ ❚✮❩❛♥✱❴❄❘❬❩☛▼✖❑ ❘❬❩✭▼

➤ ➤

32

☎ ✝✥✄ ⑧✘✢✥✯✧✝➝✳✴✢✱✍✜✍✧☞✧✤P✤✬✛①✢✱✍t✟✥✕✣✝☛✛✜➢❍☞✎✍t✝ ✕✬✛①☞✚✰ ✰✑✢✠✟✥✤①✝✱✛ ✉❍✐①✐❨❩✖▼❨▼✱❚❭❩✖▼❡❘❯❚✘❑ ✐✲❘❬❩✭❖✓❱❆❶t◆◗❵ ❵ ❴ ✇ Ï✮❘❯❚✸◆◗♠✬▼❙❦❬❩◗❚✝✆ÙÝ❷Ý➄Ý✟✞ ◆◗♠❄❖P▼❄❵ ◆✬❜✬❩✓♠✬❴❄❘➂❵➁❑ ▼❙❘❬❩✭❖ ➃ ❚âÑ☞❪♣❦❯❑ ❵ ❘❬❩◗❚✸▼✱♠✬❴❄❘⑤✐①❴❛♠①❦❯❑ s❛❲❳❚❭❩✭❖P✐❨❴❛❚✌❚❭❩✭✐❙❘✌❵ ❶ ■❏❵ ◆✬❜✬❩ ✇ ❑ ❵➛❵①❱✖❩✜❵ ◆❛♥☛❩ ❹✸♠✖❴❛♠✬Ï✘◆◗❲①❘✌❥✖❴◗❚✘❑ ❘❭◆❄❘❯❑ ❜✬❩✬❽

➤ ➤ ➤

33

✠ ✝ ✜❉✢✱✰✑✝➥➤✩✝☛⑧✘✝✠✗✜✢✥✤✖✡✌☞✎✍ ✆❤❴❛❲✱✐①◆◗♠✭♠✖❴❄❘☛✡✮❲✬▼❙❘❧❵➛❑ ▼❙❘◗◆◗♠❨❶☛♠✬◆◗♥✱❩✭▼❆❩❛❚❷❜✬❩◗❚➂❑ ♠

r■

❚✮❩❳✐①❴◗❚✮❖✭▼✴❦❬❴❛❚❳❶❄❴❛❲❝❚❝❖❝❴❛♥✧◆⑤❑ ♠ ✆❤❴❛❲P♥✩❲✬▼❙❘⑤s❳❩❆❘◗◆❝s❛❚❭❩❳❩❝♥☛❩❛♠①❘❳❦❯❚❭❴❝♥ ❘✘❥✖❩ ♠❄◆◗♥☛❩✖▼❆❩❛❚❷❜✬❩◗❚◗❴❝➀✖❩◗❚✸◆✬❘❬❴◗❚❝◆◗♠❄❖✱❘✌❥✬❩✬❶☛♥P❲✬▼❙❘ ✐①❴❛♠①❦❯❑ s❝❲❝❚❭❩✓❑ ❘◗◆✭▼❉◆P▼❄❵ ◆✬❜✬❩✧❦❭❴◗❚❳❶❄❴❛❲❳❚❝á❆❴❛♠✖❩ ✉❫❘❧❱✖❩✖▼❡❘ ❁①▼✬❵ ❴ ✇ ❩❛❚④❋❍●❏■▲❚❭❩✭▼❨❴❛❵ ❲❨❘❯❑ ❴❝♠✱◆◗♠❄❖♣❵ ◆❝✐❄❞ ❴❆❦④❚❭❩✖▼✖❑ ❵➁❑ ❩❛♠✖✐①❩ ✉❫❘ ✇ ❴◗❚✮▼❙❘ ❁✖❑ ♠❨❘❬❩◗❚❬♥✜❑ ❘➄❘❬❩❛♠①❘❳❦❭◆⑤❑ ❵➛❲❳❚❭❩✭▼♦❘❬❴✓❚❭❩✭▼❨❴❛❵ ❜✖❩ ❶❄❴❛❲❳❚❛❖❝❴❝♥✱◆◗❑ ♠

➤ ➤ ➤ ➤

34

☞ ✝❉✁☎☞ ➤✩✝☛⑧✘✝✠✗P✢♦✤✖✡✌☞✎✍✑✢✥✤✎✢☛⑧⑨⑧ ✆❍❴❛❲✱✐✣◆◗♠☛✐①❴❛♠①❦❯❑ s❛❲❳❚❭❩✓➜✘❩✔✽❄◆◗♥P➀✭❵ ❩➂Ý➛✐❨❴❝♥✜➜➂❴❝♠ ❶✬❴❝❲❝❚⑤♠✬◆◗♥✱❩✭▼❆❩❛❚❷❜✬❩◗❚✮▼✧❱❳❲①❘❳❘✌❥✬❩P❴❛❲①❘❭▼✖❑ ❖❝❩ ✇ ❴◗❚❬❵ ❖ ✇ ❑ ❵➛❵①♠✖❴❄❘❛▼❆❩❝♠✬❖♣❚❭❩✭②❛❲✖❩✭▼❙❘❭▼♦❘❬❴✧❘✘❥✖❩❛♥ ❲❳♠❨❘✌❑ ❵✻❶✬❴❝❲ ❥✬◆✬❜✬❩☛❖❝❩❛❵ ❩❳s✭◆❄❘❯❑ ❴❛♠ ÜÖ❥✬❩✓➀❝❚✮❴❛❱❳❵ ❩❛♥ ❑ ▼✧❥❝❑ ❖❳❖❝❩❝♠✜❑ ❦❝❶❄❴❛❲❝❚ ♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚➂❑ ▼❉◆❝✐✲❘❯❑ ♠✖s✓❱✬❴❄❘✌❥✧◆❳▼✴❶✬❴❝❲❝❚ ✐①◆❳✐❄❥✬❩✩◆◗♠❄❖P◆✭▼❣◆❛❲❨❘✌❥✖❴❛❚✌❑ ❘❭◆✬❘❯❑ ❜✖❩✜♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚ ✆❍❴❛❲❳❚◗❴ ✇ ♠✱✐❄❵➛❑ ❩❛♠①❘❭▼❣✐①◆◗♠P❚❭❩✖▼❆❴❛❵ ❜✖❩ ✇q✇❍✇ Ý➛❩✔✽✬◆❛♥P➀❳❵ ❩➂Ý➁✐①❴❛♥♣❸❄❱❳❲❨❘✭❘✌❥✖❩✓❚❭❩✭▼❙❘⑤❴❄❦✭❘✌❥✖❩ ✇ ❴❛❚✘❵ ❖P✐①◆❛♠❳♠✖❴❆❘

➤ ➤ ➤

35

✌ ✝✲✺ ✙✠✤✯✂❙☞✧✕✯✂❡➤✩✢✥✤✣✝ ✗ ⑧⑨✙t✝❒✛①✝❉✳✠☞✎✛❨➤✩✟ ■❫❩✭❩✓❵ ◆❄❘❬❩◗❚

➤

36

SLIDE 7 ✦✁✖✝❉✁ ☞✧✤✞✰✑✢✱✍✧✢✠✗ ✡Ð✍t✗ ✗ ✗ ✜ ✳✠☞✎✛✖✛✣✝❣✳q✤✖⑧✮➡✦➤✚✙P✛✖✡Ð✍✧✗ ✳✧✫t✢☛✍t✗P✝✠✟ ❩⑤Ý➁s➂Ý✬❑ ❦❝❶❄❴❛❲✩❥✬◆✬❜✬❩✩◆✩❺✏❄✓❥✖❴❛❲❳❚❳Ü➂Ü✔✓❝❸①◆◗♠✬❖✱❶✬❴❝❲ ▼ ✇ ❑ ♠✖s ✇q✇❍✇ Ý➁❩❚✽✬◆◗♥✩➀❳❵ ❩➂Ý➁✐①❴❛♥ ❘❭❴✓➀✖❴❛❑ ♠❨❘✭❘❬❴✩◆ ♠✬❩ ✇ ▼❆❩❛❚❷❜✖❩❛❚➽❸❡❘✘❥✖❩❛♠❉❘✌❥✖❩❛❚❭❩ ✇ ❑ ❵ ❵❨❱✬❩✩◆◗♠ ❩❚✽❨❘❬❩❝♠✬❖❝❩✖❖♣➀✖❩❛❚✌❑ ❴✭❖ ✇ ❥✖❩❛♠✧▼❨❴❛♥☛❩✜❲✬▼❨❩◗❚✮▼✧❥❝❑ ❘ ❴❝♠✖❩✜♥✱◆❝✐❆❥❝❑ ♠✖❩✩◆❛♠✬❖P▼❨❴❛♥✱❩✓❥❳❑ ❘❳❘✘❥✖❩P❴❆❘✌❥✖❩◗❚ ⑩❝❴❛❵ ❵ ❴ ✇ ❘✌❥✖❩✜➀❝❚✮❴❳✐❨❩✖❖◗❲❝❚✮❩❂❁ Ø◗➈✣➌❆➐✲➉✻➈❏é✖é✍✌Ö➏❷➊ ✥❲✛ ➓✥➒ ➑✣➐➋➏➄➈❡➍ ✂✜➎❆➒ ➏❆➎❙➏✖➣ ➈✣➎✣➍➨➏ ✚✤✣ ↔✲➊❆➐✣➇✈➍ ✘❏➎❆Ú➻➈❏➏✮↔❡➈❍➉❙↔✲➎❆➑✲↕①➈ ã❝➐➋➏✣➏✮↔❙➈❏é✖é✍✌qæ✲➎✣➉❙Ú④➏❷➊ ✚✤✣ ↔✲➊❆➐①➇✈➍

➤ ➤

➝ ➝ ➝ ➝

37 38

✒P✡Ð✍t✢☛⑧r✤①☞✚❊✜✡✌✳✴✟ ❪❫❩❄❜✬❩◗❚✮▼❨❩✎❋❍●❏■ ✠r❴ ✇ ❘❬❴✩❖❳❩❛❵ ❩✭s✭◆✬❘❭❩✩◆✩▼✬❲❳❱❄❖❝❴❛♥✧◆⑤❑ ♠

➤ ➤

39

✄☎☞✁ ✤①☞ ✰✑✢✱✍t✢✠✗✜✝❒✛✣✝q✯✱✝✱✛✣✟❉✝

✄ Ñ ❦❳❶✬❴❝❲P❥✬◆❄❜✖❩☛◆✬❘❧❵ ❩✭◆✭▼❡❘◗◆ ❳ ❺✏❄P❴❄❦❛◆❳❖❳❖⑤❚✮❩✭▼①▼ ▼❄➀✬◆❝✐①❩✧❘✘❥✖❩❛♠❣❶✬❴❝❲❝❚➂➀❳❚❭❴❄❜❳❑ ❖❳❩◗❚ ✇ ❑ ❵ ❵❙◆⑤❚✌❚✸◆◗♠✖s❳❩ ❖❳❩❛❵ ❩✭s✭◆✬❘❯❑ ❴❛♠❉❘❬❴✱❶❄❴❛❲❳❚➂♠✬◆❛♥☛❩✭▼❨❩◗❚✈❜✖❩❛❚✮▼ ❩⑤Ý➁s➂Ý✣❶❄❴❛❲❳❚➂♠✖❩❆❘✌❱❳❵ ❴❳✐❆❞t❑ ▼✜❻✜✑❳❺❧Ý ☛❧Ý➛❺❧Ý ☛ ❳ ❺✏❄ ■Ö❩❄❘❧❲✭➀✧á❆❴❛♠✖❩☛❺❧Ý❇☛❧Ý➄❻✢✑❳❺❧ÝÒ❑ ♠✖Ï❬◆❳❖❳❖◗❚➽Ý➛◆⑤❚❬➀✬◆❧Ý Ñ ❦❳❶✬❴❝❲P❥✬◆❄❜✖❩✜♥☛❴❛❚❭❩✧❘✘❥✬◆◗♠✧◆ ❳ ❺❆❄✱❘✌❥✬❩❛♠☛❩✖◆❝✐❄❥ ❳ ❺❆❄ ✇ ❑ ❵ ❵❨❱✬❩✩◆✩▼❆❩❛➀❄◆⑤❚✮◆❄❘❬❩☛á❆❴❛♠✬❩ Ñ ❦❳❶✬❴❝❲✱◆⑤❚✮❩✓❵ ❲✖✐❆❞✲❶✧❩❛♠✬❴❛❲✖s❛❥❉❘❬❴✜❥✬◆✬❜✬❩✩◆ ❳ ❻✢❈ ❘✌❥✬❩❛♠P❑ ❘ ✇ ❑ ❵ ❵❨❱✬❩✩◆✩▼✖❑ ♠✖s❛❵ ❩☛á❆❴❛♠✖❩ ✥▲■✤✚ ✓ ✥❲❱ ✓ ✛ ✓ ✛ ❨ ✥❲❱ ➒ ➍ ✥❲❱ ✓ ✥◗■✤✚ ✓➛➒ ➑ ✁ ➎✣➌①➌❆➇✎✓ ➎❆➇✸Û❙➎✯✓

➤ ➤ ➤ ➤ ➤

➝

40

✘ ✘☛✢✱✰ß❊✓⑧✘✝✜✒❅✦ ✌ ✾ ✝☎✖✝ ✾ ✝☎✝✆❲✾

@ IN SOA ....

IN NS ns0.example.com. IN NS ns0.othernetwork.com. 1 IN PTR router-e0.example.com. 2 IN PTR ns0.example.com. 3 IN PTR mailhost.example.com. 4 IN PTR www.example.com. ; etc zone "2.0.192.in-addr.arpa" { type master; file "master/192.0.2"; allow-transfer { ... }; };

✞ ❁➫➩✠✟ ✞ ✺✿✹☛✡â❁➻✾✌☞ ✞ ✡â✹➻➧➫➩❷❁✻✶ ✞✎✍✑✏✓✒✕✔ ✖☛✔ ✒

41

✄☎☞✹ ✡✮✤

☞✎✛✖❮❍✟

❩⑤Ý➁s➂Ý❡❦❭❴◗❚❾❻✜✑❳❺❧Ý❇☛➂Ý➛❺❧Ý❇❄➂❸❡❘✌❥✖❩✓❚❭❩❝♥☛❴❄❘❬❩✜❥✖❴✖▼❡❘ ✇ ❑ ❵ ❵ ❵ ❴❳❴❛❞①❲❳➀❝❄❧Ý➛❺❧Ý❇☛➂Ý✸❻✢✑✭❺❧Ý✈❑ ♠✬Ï✘◆❳❖✭❖⑤❚➽Ý➛◆◗❚✘➀✬◆➂Ý❝❹ ❪⑤Ü❏❪❾❽ Ü✽❥✖❩☛②◗❲✖❩◗❚❷❶✠❦❬❴❛❵➛❵ ❴ ✇ ▼✴❘✘❥✖❩✩❖❳❩❛❵ ❩✭s✭◆✬❘✌❑ ❴❛♠❉❘❯❚❭❩✭❩✩◆❳▼ ♠✖❴◗❚❬♥✱◆◗❵➾Ý❳Ñ ❦❛◆◗❵➛❵❨❑ ▼❣✐①❴◗❚✌❚✮❩❳✐✲❘ ❸✖❑ ❘ ✇ ❑ ❵➛❵❨❚❭❩✖◆❝✐❄❥❣❶❄❴❛❲❝❚ ♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚✸▼❣◆❛♠✬❖☛❶❄❴❛❲ ✇ ❑ ❵➛❵❨❚❭❩❛➀✭❵ ❶

r❴

✇ ❶✬❴❝❲☛✐✣◆◗♠✱▼❨❩❳❩ ✇ ❥❆❶✠❘✌❥✬❩P❴❳✐✲❘❬❩❄❘✮▼❣◆◗❚❭❩ ❚✮❩❄❜✖❩❛❚✮▼❨❩✭❖ é◗↔❙➈q➊✲Õ❏➑❙➈❨➇❆➊ ➔ ➎✴➣ ➎❆➇✈↕❨➈♦➑❙➈✲➏✮æ✣➣ ➊✣➉❙Ú ◆ ✥❲❑✜✚ ❨ ▼ ❘❳➉➋➎❆➑ ➌①➈❨➣ ➈❡↕✣➎❙➏➄➈♦➇❷➈❍❞❙➈❆➇✈➍✻➈✴åâ➅➂➆✜➒ ➑❤➉✲↔①➐✣➑✣Ú➨➍r➊ ➔ ❨ ✥❲❱ ✓ é◗↔❙➈q➊✲Õ❏➑❙➈❨➇❨➊ ➔ ➎ ❨ ✥▲❱ ➉➋➎❆➑Ù➌①➈❆➣ ➈✣↕✣➎✲➏➄➈❍➉❙↔✣➐①➑✣Ú➨➍r➊ ➔ ❨ ✚✤✣

➤ ➤ ➤

➝

42

SLIDE 8 ✗✞✫t✝✱✛①✝ ✡✘✟ ✍✧☞✧✤✬✫✜✡Ð✍✧✗ß✟✱❊t✝❉✳☛✡✘✢☛⑧❤✢✱Þ✱☞✎✙✠✤ ✛✣✝q✯✧✝☛✛✣✟✠✝ß ✁ ✄ ✆❍❴❝❲✱▼❙❘❯❑ ❵ ❵❨♠✬❩❳❩✭❖✓♥✱◆✭▼❡❘❬❩❛❚❛◆◗♠❄❖P▼❄❵ ◆❄❜✖❩❧❹✈▼✣❽ Ñ ❘ ✇ ❴❛♠❆❵ ❘ ✇ ❴◗❚❬❞❣❲✭♠❳❵ ❩✖▼❨▼✴❶❄❴❛❲☛s✭❩❄❘◗❖❳❩❛❵ ❩✭s✭◆✬❘❯❑ ❴❛♠ ❦❯❚✮❴❛♥➠◆❛❱✖❴❄❜✬❩ ❋ ➃ ♥✧◆◗❞❡❩✩▼❄❲❝❚❭❩t❘✌❥✬◆✬❘❧❑ ❦❝❶❄❴❛❲✩❥✬◆✬❜✬❩ ❪⑤Ü❏❪ ❚❭❩✭✐❨❴◗❚✸❖❳▼♦❦❬❴◗❚❝◆◗♠✓Ñ☞❪ ◆✭❖❳❖⑤❚✮❩✭▼❨▼✭❸❡❘✌❥❄◆✬❘❳❘✘❥✖❩ ❥✖❴✖▼❡❘✌♠❄◆◗♥☛❩✓❚❭❩✖▼❆❴❛❵ ❜✖❩✖▼✱❱❄◆❝✐❆❞q❘❭❴✧❘✌❥✬❩✩▼①◆◗♥☛❩✎Ñ☞❪ ◆❳❖✭❖⑤❚❭❩✖▼❨▼ Ó ➏✮↔❙➈❆➇➁Õ❏➒ ➍✻➈✴➓Ù➎❆➑✿Ô❤➍❙➒ ➏➄➈❡➍r➊❆➑r➏✮↔❙➈❉ç➛➑✿➏➄➈❨➇✮➑❙➈✻➏✣Õ❏➒ ➣ ➣ æ❙➈❆➣ ➒ ➈◗❞❡➈❏Ô❙➊❆➐❤➎❆➇❷➈❍➍❙Û✲➊①➊ ➔ ➒ ➑✲↕✴➇➄➈◗❞❡➈❨➇✈➍✻➈✴åâ➅➂➆☛➎❆➑✲➌ Õ❏➒ ➣ ➣➋➇❷➈ ➔ ➐❙➍✻➈❏➏❷➊✴➣ ➈✻➏①Ô✲➊❄➐Ù➉➋➊❆➑✣➑❡➈❡➉➨➏

➤ ➤ ➤

➝

43

✃ ✫t✢✥✤❈✡✮✕P➡✧☞✎✙ ✫t✢q✯✧✝ ⑧✌✝✠✟✠✟ ✤✬✫t✢☛✍ ✆❲✾

❪❫❩❄❜✬❩◗❚✮▼❨❩✎❋❍●❏■ ❦❬❴◗❚✖❘✌❥✖❩ ❳ ❺✏❄♣❥❄◆❳▼✧❱✖❩❳❩❝♠ ❖❳❩❛❵ ❩✭s✭◆✬❘❭❩✭❖✱❘❭❴✱❶❄❴❛❲❝❚⑤❲❳➀✬▼❙❘❯❚❭❩✖◆◗♥ ➀❝❚❭❴❆❜❝❑ ❖❝❩◗❚ ➃ ➀❨❘✌❑ ❴❛♠♣❻❆❁❨◆✭▼✬❞q❶❄❴❛❲❝❚⑤➀❝❚❭❴❆❜❝❑ ❖❝❩◗❚✖❘❬❴♣❑ ♠✬▼❨❩◗❚❷❘ ❪⑤Ü❏❪ ❚❭❩❳✐①❴◗❚✸❖❳▼✱❑ ♠❨❘❬❴t❘✌❥✖❩❛❑➛❚❧❋q●r■☎▼❨❩◗❚❷❜✬❩◗❚✮▼ ã❝➇❷➊❆æ✣➣ ➈❨➓✕✝➻Ô✲➊❄➐q↔✲➎④❞❙➈Ù➏❷➊q➎✣➍❙Ú④➏✮↔❡➈❨➓ ➈❍❞❙➈❆➇➁Ôr➏✮➒ ➓❤➈ Ô✲➊❄➐❫ÕÖ➎❆➑✿➏✣➏➄➊✴➓Ù➎❄Ú➨➈q➎q➉❙↔✲➎❆➑✲↕❨➈ ➃ ➀❨❘✌❑ ❴❛♠✧❺⑧❁❡❦❭❴❛❵➛❵ ❴ ✇ ❘✌❥✖❩✜➀❝❚❭❴✭✐❨❩✖❖◗❲❝❚❭❩✓❑ ♠ ❪❤⑩❛❢❤❺❆✍â❻✢❉ ä◗➍✻➈✣➍r➎Ù➏✮➇✸➒ ➉❙Ú④Õ❏➒ ➏❭↔❤êÖ➅

❏ ➏❷➊✠➇❷➈❡➌❆➒ ➇❷➈✣➉➫➏❳ã❄é➂Ø ➇❷➈❡→❆➐❡➈❡➍➨➏❷➍ ➔ ➊❆➇❡Ô❙➊❄➐✣➇✭ç➁ã✭➍✽➏❷➊❤Ô✲➊❄➐✣➇✬➑✲➎❄➓❤➈❡➍✻➈❨➇⑥❞❙➈❆➇✈➍

➤ ➤

➝

➤

➝

44

✝✹✝✌✗ ✝✞✁✂☞✎✙❒☞✁ ✍ ✦ ✌ ✾ ✝☎ ✝ ✾ ✝ ☎

✆❲✾

✌

; In the provider’s 2.0.192.in-addr.arpa zone file 64 IN CNAME 64.64/29.2.0.192.in-addr.arpa. 65 IN CNAME 65.64/29.2.0.192.in-addr.arpa. 66 IN CNAME 66.64/29.2.0.192.in-addr.arpa. 67 IN CNAME 67.64/29.2.0.192.in-addr.arpa. 68 IN CNAME 68.64/29.2.0.192.in-addr.arpa. 69 IN CNAME 69.64/29.2.0.192.in-addr.arpa. 70 IN CNAME 70.64/29.2.0.192.in-addr.arpa. 71 IN CNAME 71.64/29.2.0.192.in-addr.arpa. 64/29 IN NS ns0.customer.com. 64/29 IN NS ns1.customer.com. 65 IN PTR www.customer.com. 66 IN PTR mailhost.customer.com. ; etc

❃✣❁➫➩✁✄✂✆☎✞✝①✺✿❁✠✟☛✡✌☞ ✞ ✒✓✏✕✔ ✒✕✔ ✖☛✔ ✍✑✏✓✒✕✔ ✷ ✺✎✍Ò✹➻✾✲✾✣✶ ✔ ✹✻✶✏✂✿✹✄✟✑✝✣✺✆✒✎✝✓❙✶ ✺✿✹☛✡â❁➻➧➻❁✻✶➾➭➋❁✻✶✈➧

45

✄ ☞✁ ➤✜☞✦➡✧☞✎✙❒➤✩✝☛⑧✘✝✠✗P✢♦✤✣✝ ✢ ✟✱✙PÞ✧➤✜☞✎✰✑✢☛✡Ð✍✜❰ ÑÒ♠✩➀❝❚✘❑ ♠✖✐❄❑ ➀✭❵ ❩✩▼❙❘❯❚✸◆⑤❑ s❝❥❨❘➄❦❬❴❛❚ ✇ ◆◗❚✮❖⑧❁ ✡✮❲❄▼❡❘④❑ ♠✬▼❨❩◗❚❷❘

r■

❚✮❩❳✐❨❴❛❚✮❖❳▼♦❦❬❴❛❚✭❘✌❥✬❩✩▼❄❲❳❱✬❖❳❴❛♥✱◆◗❑ ♠◗❸❄➀✖❴◗❑ ♠❨❘❯❑ ♠✖s ◆❄❘◗▼❨❴❛♥☛❩✭❴❛♠✖❩✩❩❛❵ ▼❆❩✴❵ ▼❉▼❆❩❛❚❷❜✬❩◗❚✮▼ Ñ ❦❳❶✬❴❝❲✱◆⑤❚✮❩✓❱✬❩◗❑ ♠✬sP✐✣◆⑤❚❭❩❆❦✌❲❳❵➾❸✣❶❄❴❛❲✱▼❄❥✖❴❝❲❳❵ ❖✧❦❯❑➛❚✸▼❡❘ ✔➋✐❆❥✖❩✭✐❄❞✎✔r❘✌❥❄◆✬❘❳❘✘❥✖❴✭▼❨❩✩▼❨❩◗❚✈❜✖❩◗❚✸▼❉◆⑤❚❭❩ ◆❛❲❨❘✌❥✖❴❛❚✌❑ ❘✮◆✬❘❯❑ ❜✖❩t❦❬❴◗❚✖❘✌❥✖❩☛▼✬❲❳❱❄❖❝❴❛♥✧◆⑤❑ ♠ ➐✲➍❙➒ ➑❙↕ ✎➄➌❆➒ ↕✧✎✬➊❆➑Ù➎❆➣ ➣⑨➏✮↔❙➈q➍➋➈❆➇ ❞❡➈❨➇✈➍ Ñ ❦✭❘✌❥✖❩☛▼✬❲✭❱✬❖❝❴❝♥✱◆⑤❑ ♠✜❑ ▼✧♥✱◆◗♠❄◆❝s❳❩✖❖♣❱✬◆✭❖◗❵ ❶❝❸✖❑ ❘ ❚✮❩❄❦✌❵ ❩❳✐❙❘✮▼✱❱❄◆❳❖◗❵ ❶✧❴❛♠t❶❄❴❛❲ ✏

➤ ➤

➝

➤

46

✕♣☞✎✍✧✝ ✕✖✡⑨⑧✘✝ ✕❨☞✎✛✗✖✭✝ ✘☛✢✱✰ß❊✜⑧✘✝✖✝❯✳✠☞✎✰✘✖

$TTL 1d @ 1h IN SOA ns1.example.net. brian.nsrc.org. ( 2004030300 ; Serial 8h ; Refresh 1h ; Retry 4w ; Expire 1h ) ; Negative IN NS ns1.example.net. IN NS ns2.example.net. IN NS ns1.othernetwork.com. ; My own zone data IN MX 10 mailhost.example.net. www IN A 212.74.112.80 ; A delegated subdomain subdom IN NS ns1.othernet.net. IN NS ns2.othernet.net.

47

✗✞✫t✝✱✛①✝ ✡✘✟➥☞✎✍t✝❒❊P✛❨☞✎Þ✜⑧✌✝✱✰ ✫t✝✱✛①✝✜✒

❏■▲❚❭❩✭✐❨❴◗❚✸❖❳▼✧➀✖❴◗❑

♠❨❘❳❘❭❴✓♠✬◆❛♥☛❩✭▼✭❸✬♠✬❴❄❘❾Ñ☞❪❧▼ ➙ ❥✬◆✬❘❧❑ ❦❧➜✘❩✔✽❄◆◗♥P➀✭❵ ❩➂Ý➛✐❨❴❛♥P➜â❑ ▼❣❖❳❩❛❵ ❩✭s✭◆✬❘❭❩✭❖✱❘❭❴ ➜❯♠✬▼✭Ý➁❩❚✽✬◆◗♥✩➀❳❵ ❩➂Ý➁✐①❴❛♥P➜✚✙ ■❫❴❝♥☛❩❳❴❝♠✖❩ ✇ ❥✖❴✓❑ ▼✱❑ ♠❉❘✌❥✖❩✜➀❝❚❭❴✭✐❨❩✖▼❨▼❣❴❄❦ ❚❭❩✖▼❆❴❛❵ ❜❝❑ ♠✖s✚❹❷▼①◆✖❶❨❽ ✇❍✇q✇ Ý➁❩✔✽❄◆◗♥P➀✭❵ ❩➂Ý➛✐❨❴❛♥ ❥✬◆✭▼ ❘❬❴t❦❯❑➛❚✸▼❡❘❧❚❭❩✭▼❨❴❛❵ ❜✖❩✜♠✬▼✭Ý➁❩✔✽❄◆◗♥P➀✭❵ ❩➂Ý➛✐❨❴❝♥ ③✽❲①❘❳❘✌❥✖❩❄❶✱✐✣◆◗♠✭♠✖❴❄❘❧❚❭❩✭▼❨❴❛❵ ❜✖❩ ♠✬▼✭Ý➁❩✔✽❄◆◗♥✩➀❳❵ ❩⑤Ý➁✐①❴❛♥ ✇ ❑ ❘✘❥✖❴❛❲①❘❳❦❯❑ ❚✮▼❙❘④❚❭❩✖▼❆❴❛❵ ❜❳❑ ♠✖s ♠✬▼✭Ý➁❩✔✽❄◆◗♥✩➀❳❵ ❩➂Ý➁✐①❴❛♥ ✏ ✏

➤ ➤ ➤ ➤

48

SLIDE 9 ✷⑨✍ ✤✬✫✜✡✌✟➝✳✴✢✠✟✠✝ ➡✧☞✎✙ß✍✧✝✠✝❉➤ ✖✭✗ ⑧⑨✙t✝ ✖ ✉ ➜✘s❛❵ ❲✖❩♣❚✮❩❳✐①❴◗❚✮❖⑤➜④❑ ▼❉◆◗♠✠✉ ❚❭❩✭✐❨❴❛❚✮❖✱❦❭❴◗❚✭❘✘❥✖❩ ♠❄◆◗♥☛❩✖▼❆❩❛❚❷❜✖❩❛❚ à✲✽✬◆◗♥✩➀❳❵ ❩❂❁❆✐①❴❛♠✬▼✬❑ ❖❳❩◗❚✖❘✌❥✖❩✎Ý➁✐❨❴❝♥ ♠❄◆◗♥☛❩✖▼❆❩❛❚❷❜✬❩◗❚✮▼

➤ ➤

; this is the com. zone example NS ns.example.com. NS ns.othernet.net. ns.example.com. A 192.0.2.1 ; GLUE RECORD

49

❈☞✎✍✁✏➾✤✞❊P✙✠✤❈✡Ð✍✑✗ ⑧Ð✙t✝ ✛✣✝❉✳❉☞✎✛①➤✩✟ ✝✙✘✩✳✴✝☛❊✠✤

✫t✝✱✛①✝❒✍t✝❣✳✴✝✠✟✠✟✠✢☛✛✲➡

ÑÒ♠❉❘✌❥✖❩✜➀❝❚❭❩❄❜❳❑ ❴❝❲✬▼❣❩✔✽❄◆◗♥P➀✭❵ ❩⑤❸ ➜❯♠✬▼✭Ý➁❴❄❘✌❥✬❩◗❚✘♠✬❩❄❘ ÝÒ♠✬❩❄❘❯➜④❑ ▼✧♠✖❴❄❘❛◆P▼❄❲❳❱✬❖❳❴❛♥✱◆◗❑ ♠✱❴❄❦ ➜✘❩✔✽❄◆◗♥✩➀❳❵ ❩⑤Ý➁✐❨❴❝♥✜➜ÐÝ❡ÜÖ❥✖❩❛❚❭❩❄❦❭❴◗❚❭❩✜♠✖❴✩s❛❵➛❲✬❩♣❑ ▼ ♠✖❩✭❩✭❖❝❩✖❖❧Ý ➃ ❲❨❘❬Ï✌❴❆❦❬Ï✘❖❳◆❄❘❬❩Ps❝❵➛❲✖❩✓❚❭❩✭✐❨❴◗❚✸❖❳▼❉◆⑤❚❭❩☛◆♣❱❳❑ s ▼❆❴❝❲❝❚❭✐①❩P❴❆❦❧➀❝❚✮❴❛❱❳❵ ❩❛♥✧▼ ➈✔✓ ↕✕✓➋➎ ➔ ➏➄➈❆➇❡Ô❙➊❆➐q↔❙➎❍❞❡➈♦➇❷➈❨➑①➐✣➓qæ❡➈❨➇❷➈❡➌❤Ô✲➊❄➐✣➇ ➑✲➎❄➓❤➈❡➍✻➈❨➇⑥❞❙➈❆➇❡➏❷➊q➎❄➑✲➊✲➏✮↔❙➈❆➇✬➑❙➈✲➏➾Õ✽➊❄➇✸Ú ❋❍❑ ❦➄❦❯❑ ✐❄❲❳❵ ❘❳❘❬❴☛❖❝❩❝❱❳❲✖s➂❸✬❚❭❩✭②❛❲❝❑ ❚❭❩✭▼✱➜❬❖⑤❑ s✁◗♠✬❴◗❚❭❩✭✐✬➜

➤ ➤

➝

➤

50

✘ ✘☛✢☛✰ß❊✜⑧✘✝

✫t✝☛✛✣✝

✢➝✗ ⑧Ð✙t✝❒✛①✝❉✳✠☞✚✛①➤ ✷❯✄ ✍t✝✠✝❉➤P✝❉➤

; My own zone data IN MX 10 mailhost.example.net. www IN A 212.74.112.80 ; A delegated subdomain subdom IN NS ns1.subdom ; needs it IN NS ns2.othernet.net. ; doesn’t ns1.subdom IN A 192.0.2.4

51

✔ ✫t✝❉✳✧❮❣✡Ð✍t✗❒✕①☞✚✛♣✗ ⑧⑨✙t✝❒✛①✝❉✳✠☞✎✛❨➤✩✟ ❖⑤❑ s✝◗♠✖❴❛❚❭❩❳✐ ✙✂◆❧Ý➛s❄❘✌❵ ❖❳Ï✘▼❨❩◗❚❷❜✬❩◗❚✸▼❳ÝÒ♠✬❩❄❘ Ý ✇q✇❍✇ Ý➛◆❳▼✢✑④❻✜☛✏❊❧ÝÒ♠✬❩❄❘ Ý❨◆ ✓❄❴❳❴❝❞q❦❬❴❛❚✖✉ ❚❭❩❳✐①❴◗❚✸❖❳▼✱❑ ♠❉❘✌❥✖❩✓➜➄✉❤❖❳❖◗❑ ❘❯❑ ❴❛♠✬◆❛❵➁➜ ▼❆❩❳✐✲❘❯❑ ❴❛♠ ✇ ❥✖❴✖▼❆❩✧Ü❧Ü ✓t❖❝❴✭❩✭▼✧♠✖❴❄❘◗✐❨❴❛❲✭♠❨❘◗❖❳❴ ✇ ♠

➤ ➤

$ dig +norec @a.gtld-servers.net. www.as9105.net. a ... ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADD’L: 1 ;; QUERY SECTION: ;; www.as9105.net, type = A, class = IN ;; AUTHORITY SECTION: as9105.net. 2D IN NS ns0.as9105.com. as9105.net. 2D IN NS ns0.tiscali.co.uk. ;; ADDITIONAL SECTION: ns0.as9105.com. 2D IN A 212.139.129.130 52

✂✁☎✄ ✒✠☞t✯✱✝✱✛✣✢☛⑧⑨⑧❍✟✱✙P✰ß✰✑✢☛✛✲➡ ❋❍❑ ▼❡❘✌❚✌❑ ❱✭❲❨❘❬❩✭❖✩❖❳◆✬❘✮◆◗❱✬◆❳▼❨❩P❴❆❦❾❪❍❪❫▼ ÜÖ❥❳❚❭❩❳❩✓❚❭❴❝❵ ❩✭▼❆❁✖❚✮❩✭▼❨❴❛❵ ❜✬❩◗❚➽❸❨✐①◆❳✐❄❥✬❩➂❸ ◆◗❲①❘✌❥✖❴◗❚✘❑ ❘❭◆❄❘❯❑ ❜✬❩ ❪r❩✖▼❆❴❝❵ ❜✬❩◗❚❛▼❙❘❭◆❄❘❯❑ ✐✣◆◗❵➛❵ ❶✧✐❨❴❛♠①❦❯❑ s❝❲❝❚❭❩✖❖ ✇ ❑ ❘✌❥❉❘✌❥✖❩ ♠✖❩✖◆⑤❚❭❩✖▼❡❘◗✐①◆❝✐❆❥✖❩➂❹❷▼❡❽ ➈✔✓ ↕✕✓❩❨✮➈✻➏❷➉❩❨❬➇➄➈❡➍➋➊❆➣ ❞❃✓ ➉✿➊❄➑ ➔ ❢❍◆❳✐❄❥✬❩✭▼❉▼❡❘❭◆❄❘❯❑ ✐✣◆◗❵ ❵ ❶✧✐❨❴❝♠❨❦❯❑ s❛❲❝❚✮❩✭❖ ✇ ❑ ❘✘❥✱◆✓❵➁❑ ▼❙❘ ❴❄❦❧❚❭❴❳❴❆❘❧♠✬◆❛♥☛❩✭▼❨❩◗❚✈❜✖❩◗❚✸▼ ë ➊❆➑❙➈Ù➏➾Ô①Û❙➈ ✎❭↔①➒ ➑✿➏ ✎✘è❩❨✮➈✻➏❷➉❩❨❬➑❙➎❆➓❤➈❡➌❄æ❬❨❬➑✲➎❄➓❤➈❡➌✯✓➛➇❷➊✣➊✲➏

➤ ➤ ➤

➝

➤

➝

53

✄ ✒✠☞t✯✧✝✱✛①✢☛⑧⑨⑧❤✟✱✙✜✰ß✰✑✢✱✛❙➡ ✂➻✳✠☞✎✍❉✤✆☎ ❪❫❴❳❴❄❘➂♠✬◆◗♥✱❩✭▼❨❩◗❚❷❜✬❩◗❚✸▼t✐①❴❛♠①❘❭◆⑤❑ ♠✧❖❝❩❝❵ ❩❳s✖◆✬❘❯❑ ❴❛♠✬▼ ❹❭●❏■▲❚❭❩❳✐①❴◗❚✮❖✭▼✣❽⑤❘❬❴Ps❆❘✌❵ ❖P❴◗❚❛✐❨❴❝❲❳♠❨❘❯❚❷❶✬Ï❯❵ ❩❄❜✬❩❛❵ ▼❨❩◗❚❷❜✬❩◗❚✸▼✜❹❷✐❨❴❝♥♣❸❄❲❳❞✴❩❄❘❬✐❙❽ ⑩◗❲❝❚❷❘✘❥✖❩◗❚❝❖❝❩❛❵ ❩❳s✭◆❄❘❯❑ ❴❝♠✬▼♦❘❬❴✩▼❄❲❳❱❄❖❝❴❛♥✧◆⑤❑ ♠❄▼ ❢❤◆❝✐❆❥✖❩✧❦✌❑ ♠✬◆❛❵➛❵ ❶✩❵ ❴❳✐✣◆✬❘❬❩✭▼❉◆◗♠✧◆◗❲①❘✌❥✖❴◗❚✘❑ ❘❭◆❄❘❯❑ ❜✬❩ ▼❨❩◗❚❷❜✬❩◗❚❛✐❨❴❝♠❨❘❭◆⑤❑ ♠❝❑ ♠✖s✧❘✌❥✬❩✚❪❍❪❫▼ ✇ ❩✓❚❭❩✖②◗❲❝❑ ❚❭❩ à✽❚✌❚❭❴❛❚✮▼✱❑ ♠✧❖❝❩❛❵ ❩❳s✭◆❄❘❯❑ ❴❛♠✱❴◗❚➂❑ ♠✱✐❨❴❝♠❨❦❯❑ s❝❲❝❚✮◆❄❘❯❑ ❴❝♠ ❴❆❦◗◆◗❲①❘✌❥✖❴◗❚✘❑ ❘❭◆❄❘❯❑ ❜✬❩✩▼❨❩◗❚✈❜✖❩◗❚✸▼✱❚❭❩✭▼❄❲❳❵ ❘❧❑ ♠✩♠✖❴ ◆❛♠✬▼ ✇ ❩◗❚❛❴◗❚➂❑ ♠✖✐①❴❛♠✬▼✬❑ ▼❙❘❬❩❝♠❨❘◗◆◗♠❄▼ ✇ ❩◗❚✸▼

➤ ➤ ➤ ➤

54