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KATSUYA
July 19, 2019
Technology
1
780
networkctf
世界のエンジニアと渡り合えたCTF
https://connpass.com/event/137325/
KATSUYA
July 19, 2019
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Transcript
ੈքͷΤϯδχΞͱ Γ߹͑ͨCTF উஉ(@katu7414) DMVTNBUPNF
ࣗݾհ Network Automation https://github.com/Katsuya414 SR,Batfish,Ansible,PyATS,Genie JANOG43 LTͰॳొஃ NETCONओ࠵ऀ !LBUV !2
DMVTNBUPNF
ΞϝϦΧͰҰ൪ඒຯ͔ͬͨ͠൧ DMVTNBUPNF
CTFͬͯʁ $BQUVSF5IF'MBH ضऔΓήʔϜ ͷུ ຊདྷใηΩϡϦςΟͷٕज़Λڝ͏ڝٕͷ͜ͱ Ӆ͞Εͨ'MBHΛηΩϡϦςΟٕज़Λ༻͍ͯ ୳ͯ͑͠Λ୳͢ܗ͕ࣜଟ͍ ճऀ 'MBHͷૹ৴ ͷμϯϩʔυ
ಘͷऔಘ DMVTNBUPNF
ࠓճηΩϡϦςΟͰͳ͘ ωοτϫʔΫ൛Ͱ͋ͬͨ Enterprise Networkingฤ DMVTNBUPNF
جຊతͳϧʔϧ(cisco live൛) ੍ݶ࣌ؒʹΑΓଟ͘ͷϙΠϯτΛऔͬͨํ͕উͪ νʔϜϝϯόʔҰਓ(ݸਓઓ) ݕࡧՄ(Ͱ΄ͱΜͲ͢Δඞཁ͕ͳ͍ͷͩͬͨ) ڝٕதͷղ๏ͷڞ༗ېࢭ DMVTNBUPNF
ࠓճͷδϟϯϧ Secure Campus Access Secure Branches WAN Network assurance investigation
DMVTNBUPNF
None
ԿނΞϝϦΧͰϥʔϝϯΛ ৯ͨͷ͔ʁ DMVTNBUPNF
Ͱ͔͜͜Β4ؒͷܹಆͱ ϥʔϝϯʹ͍ͭͯ ࣌ܥྻॱͰ͍͖ͬͯ·͢ɻ DMVTNBUPNF
6/11 DMVTNBUPNF
None
Secure Campus Access ڌؒ௨৴ΛCisco DNA CenterΛ༻͍ͯߦͳͬ ͍ͯΔײ͡ͰͦͷτϥϒϧγϡʔςΟϯάͩͬ ͨɻ ϙʔτ13ͱ14͚ͩΛಠཱͤ͞ΔL2ͷΞʔΩςΫ νϟʁΈ͍ͨͳ͕Ұ൪༏͍͠
ACL͍͠ɻ͔ͳΓ͕͔͔࣌ؒͬͨ DMVTNBUPNF
ॳҐ ϙΠϯτ DMVTNBUPNF
None
͜ͷ࣌Ͱͷײ ӳޠແཧ ຊޠͳΒഒͷՔ͛ͯͨ ΞϝϦΧͷՁߴ͍ ϝΩγίྉཧ͏·͍ ΞϝϦΧͷϥʔϝϯϩʔΧϧϑʔυͱฉ͍ͨ DMVTNBUPNF
6/12 DMVTNBUPNF
ಘΛഒʹ͚ͨ͠ͲॱҐͭԼ͛ͯҐ 4FDVSF$BNQVT"DDFTTΛ ղ͖ଓ͚͍ͯͨ ன͔Β4FHNFOU3PVUJOHͷΛฉ͖ʹߦͬͯͨ
SP VIP Customer Reception DMVTNBUPNF
None
None
͜ͷ࣌Ͱͷײ ઈରʹ30ҐҎʹϥϯΫΠϯ͍ͨ͠ ϝΩγίྉཧඒຯ͍͠ ϥʔϝϯ৯͍ͨ ΠϯυਓͱӳޠͰίϛϡχέʔγϣϯऔΔͷ ͍͠ DMVTNBUPNF
6/13 DMVTNBUPNF
Secure Branches WAN DMVTNBUPNF
WANͷ • ෳͷωοτϫʔΫػث͕͋ͬͯͦΕΒΛCisco DNA CenterͰߏங͍ͯ͘͠ɻ • GUI͔Βղܾ͢Δ͕΄ͱΜͲ • ෳͷػث͔Β·ͱΊͯshowͰใͱͬͯղ͘ GUIͷάϥϑ͔ΒಡΈऔΔ
• গ͠؆୯ͩͬͨؾ͕͢Δ DMVTNBUPNF
None
ϥζϖϦʔύΠ3ͷηοτΒͬͨ ݱࡏ31Ґ DMVTNBUPNF
None
None
None
None
͜ͷ࣌Ͱͷײ ໌ͷனϥʔϝϯ৯ʹߦ͜͏ 31Ґչ͍͠չ͗͢͠Δ ϥΠϒ͛͢ʙ ͦ͏͍͑͜ͷग़ுCTF͔ͯ͠͠ͳ͍͕͍͍ ͷ͔ʁ(ΓҰ) DMVTNBUPNF
6/14 DMVTNBUPNF
Network assurance investigation DMVTNBUPNF
ແઢܥͷτϥϒϧ τϥϑΟοΫੳΛͯ͠ѱ͍͜ͱͯͦ͠͏ͳϢʔ βʔΛݟ͚ͭͨΓɺ࣭ͷ্Λ͢Δɻ GUIଟΊ WLCͳͲͷίϯτϩʔϥʔܥDNA Centerͷ DMVTNBUPNF
DMVTNBUPNF
DMVTNBUPNF
ӳޠͰΠϯλϏϡʔΛ ड͚Δ DMVTNBUPNF
15Ґ DMVTNBUPNF
উརͷϥʔϝϯ(13υϧ) DMVTNBUPNF
τʔλϧͷײ ೖࣾҎ߱࠷ߴͷࣄͰ͋ͬͨͱ͍͏͜ͱ CiscoͲΜͲΜιϑτΣΞʹྗΛೖΕ͍ͯ͜͏ͱ͍͏ งғؾΛ͘͢͝ײͨ͡ ωοτϫʔΫͷCTF͋ΓͳͷͰࠃͰΔͧ ·ͨϥʔϝϯ৯ʹ͍͜͏ ӳޠͷΠϯλϏϡʔΛड͚Δ४උΛ͔ͯ͠Βߦ͜͏ DMVTNBUPNF