networkctf

世界のエンジニアと渡り合えたCTF
https://connpass.com/event/137325/

Transcript

1. ੈքͷΤϯδχΞͱ ౉Γ߹͑ͨCTF উஉ(@katu7414) DMVTNBUPNF
2. ࣗݾ঺հ Network Automation https://github.com/Katsuya414 SR,Batfish,Ansible,PyATS,Genie JANOG43 LTͰॳొஃ NETCONओ࠵ऀ !LBUV !2
   DMVTNBUPNF
3. ΞϝϦΧͰҰ൪ඒຯ͔ͬͨ͠൧
   DMVTNBUPNF
4. CTFͬͯʁ $BQUVSF
   5IF
   'MBH ضऔΓήʔϜ ͷུ
   ຊདྷ͸৘ใηΩϡϦςΟͷٕज़Λڝ͏ڝٕͷ͜ͱ Ӆ͞Εͨ'MBHΛηΩϡϦςΟٕज़Λ༻͍ͯ
   ୳ͯ͠౴͑Λ୳͢ܗ͕ࣜଟ͍ ճ౴ऀ 'MBHͷૹ৴ ໰୊ͷμ΢ϯϩʔυ ಘ఺ͷऔಘ
   DMVTNBUPNF
5. ࠓճ͸ηΩϡϦςΟͰ͸ͳ͘ ωοτϫʔΫ൛Ͱ͋ͬͨ Enterprise Networkingฤ DMVTNBUPNF
6. جຊతͳϧʔϧ(cisco live൛) ੍ݶ࣌ؒ಺ʹΑΓଟ͘ͷϙΠϯτΛऔͬͨํ͕উͪ νʔϜϝϯόʔҰਓ(ݸਓઓ) ݕࡧ͸Մ(Ͱ΋΄ͱΜͲ͢Δඞཁ͕ͳ͍΋ͷͩͬͨ) ڝٕதͷղ๏ͷڞ༗͸ېࢭ
   DMVTNBUPNF
7. ࠓճͷδϟϯϧ Secure Campus Access Secure Branches WAN Network assurance investigation
   DMVTNBUPNF
9. ԿނΞϝϦΧͰϥʔϝϯΛ ৯΂ͨͷ͔ʁ DMVTNBUPNF
10. Ͱ͸͔͜͜Β4೔ؒͷܹಆͱ ϥʔϝϯʹ͍ͭͯ ࣌ܥྻॱͰ௥͍͖ͬͯ·͢ɻ DMVTNBUPNF
11. 6/11 DMVTNBUPNF
13. Secure Campus Access ڌ఺ؒ௨৴ΛCisco DNA CenterΛ༻͍ͯߦͳͬ ͍ͯΔײ͡ͰͦͷτϥϒϧγϡʔςΟϯάͩͬ ͨɻ ϙʔτ13ͱ14͚ͩΛಠཱͤ͞ΔL2ͷΞʔΩςΫ νϟ͸ʁΈ͍ͨͳ໰୊͕Ұ൪༏͍͠ ACL͸೉͍͠ɻ͔ͳΓ͕͔͔࣌ؒͬͨ
    DMVTNBUPNF
14. ॳ೔Ґ
    ϙΠϯτ
    DMVTNBUPNF
16. ͜ͷ࣌఺Ͱͷײ૝ ӳޠແཧ ೔ຊޠͳΒഒͷ఺਺͸Ք͛ͯͨ ΞϝϦΧͷ෺Ձߴ͍ ϝΩγίྉཧ͏·͍ ΞϝϦΧͷϥʔϝϯ͸ϩʔΧϧϑʔυͱฉ͍ͨ
    DMVTNBUPNF
17. 6/12 DMVTNBUPNF
18. ಘ఺Λ໿ഒʹ͚ͨ͠ͲॱҐ͸ͭԼ͛ͯҐ
    4FDVSF
    $BNQVT
    "DDFTTΛ
    ղ͖ଓ͚͍ͯͨ
    ன͔Β͸4FHNFOU
    3PVUJOHͷ࿩Λฉ͖ʹߦͬͯͨ
19. SP VIP Customer Reception
    DMVTNBUPNF
22. ͜ͷ࣌఺Ͱͷײ૝ ઈରʹ30ҐҎ಺ʹϥϯΫΠϯ͍ͨ͠ ϝΩγίྉཧඒຯ͍͠ ϥʔϝϯ৯΂͍ͨ ΠϯυਓͱӳޠͰίϛϡχέʔγϣϯऔΔͷ ೉͍͠
    DMVTNBUPNF
23. 6/13 DMVTNBUPNF
24. Secure Branches WAN DMVTNBUPNF
25. WANͷ໰୊ • ෳ਺ͷωοτϫʔΫػث͕͋ͬͯͦΕΒΛCisco DNA CenterͰߏங͍ͯ͘͠ɻ • GUI͔Βղܾ͢Δ໰୊͕΄ͱΜͲ • ෳ਺ͷػث͔Β·ͱΊͯshowͰ৘ใͱͬͯղ͘໰ ୊΍GUIͷάϥϑ͔ΒಡΈऔΔ໰୊ • গ͠؆୯ͩͬͨؾ͕͢Δ
    DMVTNBUPNF
27. ϥζϖϦʔύΠ3ͷηοτ΋Βͬͨ ݱࡏ31Ґ
    DMVTNBUPNF
32. ͜ͷ࣌఺Ͱͷײ૝ ໌೔ͷனϥʔϝϯ৯΂ʹߦ͜͏ 31Ґ͸չ͍͠չ͗͢͠Δ ϥΠϒ͛͢ʙ ͦ͏͍͑͹͜ͷग़ுCTF͔ͯ͠͠ͳ͍͕͍͍ ͷ͔ʁ(࢒ΓҰ೔)
    DMVTNBUPNF
33. 6/14 DMVTNBUPNF
34. Network assurance investigation DMVTNBUPNF
35. ແઢܥͷτϥϒϧ τϥϑΟοΫ෼ੳΛͯ͠ѱ͍͜ͱͯͦ͠͏ͳϢʔ βʔΛݟ͚ͭͨΓɺ࣭ͷ޲্Λ͢Δɻ GUIଟΊ WLCͳͲͷίϯτϩʔϥʔܥ΍DNA Centerͷ໰୊
    DMVTNBUPNF
36. 
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37. 
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38. ӳޠͰΠϯλϏϡʔΛ
    ड͚Δ
    DMVTNBUPNF
39. 15Ґ
    DMVTNBUPNF
40. উརͷϥʔϝϯ(13υϧ)
    DMVTNBUPNF
41. τʔλϧͷײ૝ ೖࣾҎ߱࠷ߴͷ࢓ࣄͰ͋ͬͨͱ͍͏͜ͱ Cisco͸ͲΜͲΜιϑτ΢ΣΞʹྗΛೖΕ͍ͯ͜͏ͱ͍͏ งғؾΛ͘͢͝ײͨ͡ ωοτϫʔΫͷCTF͋ΓͳͷͰࠃ಺Ͱ΍Δͧ ·ͨϥʔϝϯ৯΂ʹ͍͜͏ ӳޠͷΠϯλϏϡʔΛड͚Δ४උΛ͔ͯ͠Βߦ͜͏
    DMVTNBUPNF