Semester Conclusion pschiu Computer Center, CS, NCTU This Semester - - PowerPoint PPT Presentation

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Semester Conclusion pschiu Computer Center, CS, NCTU This Semester - - PowerPoint PPT Presentation

Sep 14, 2022 121 likes •280 views

Semester Conclusion pschiu Computer Center, CS, NCTU This Semester DNS Web Email PKI Network 2 Computer Center, CS, NCTU DNS Not all about yourself BIND Child Slave Domain Name Registrar Root

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SLIDE 1

Semester Conclusion

pschiu

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SLIDE 2

Computer Center, CS, NCTU

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This Semester

 DNS  Web  Email  PKI  Network

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SLIDE 3

Computer Center, CS, NCTU

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DNS

 Not all about yourself  BIND

  • Child
  • Slave

 Domain Name

  • Registrar
  • Root
  • DNSSEC
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SLIDE 4

Computer Center, CS, NCTU

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Web

 HTTP  HTTPS

  • SSL - Certification Authority Issuer

 How to Secure

  • Avoid data leak
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SLIDE 5

Computer Center, CS, NCTU

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Email

 Service

  • Postfix
  • Dovecot

 Function

  • SPF
  • DNS
  • DKIM
  • DNS
  • DMARC
  • DNS
  • SASL
  • Authentication Based
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SLIDE 6

Computer Center, CS, NCTU

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Environment

 Hardware issue  Network issue  Environment issue  Every issue makes you lose your point

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SLIDE 7

How to make it stronger

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SLIDE 8

Computer Center, CS, NCTU

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Something you should be considered

 Environment Control  DRP

  • Disaster Recovery Planning

 RBS

  • Remote Backup Site

 SLB

  • Serve Load-Balancing
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SLIDE 9

Computer Center, CS, NCTU

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Environment Control

 Temperature  Humidity  Fire Suppression Systems

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SLIDE 10

Computer Center, CS, NCTU

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Disaster Recovery Planning

 Frequently Backup

  • Daily, Monthly, etc.

 Backup Strategy

  • Fully Backup
  • Incremental Backup
  • Differential Backup

 Restore from Backup

  • Practice
  • Always fail on this

 Building Remote Backup Site

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SLIDE 11

Computer Center, CS, NCTU

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Remote Backup Site

 Distance

  • More than 50km

 Network  Environment

  • Natural disaster
  • Brewing water
  • Debris flow
  • Earthquake zone
  • Human Factors
  • Power circuit
  • Power generator
  • Uninterruptible power supply (UPS)
  • Air Conditioner
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SLIDE 12

Computer Center, CS, NCTU

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Serve Load-Balancing

 Traditional SLB

  • Hardware Failure
  • Software Failure
  • Load balancer features

 Advance SLB

  • Geo-location SLB
  • Global Content Delivery Network (CDN)
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SLIDE 13

Computer Center, CS, NCTU

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Load balancer features

 Asymmetric load  Priority activation  SSL Offload and Acceleration  Distributed Denial of Service  HTTP compression  TCP offload  TCP buffering  Direct Server Return  Health checking  HTTP caching  Content filtering  HTTP security  Priority queuing  Content-aware switching  Client authentication  Programmatic traffic manipulation  Firewall  Intrusion prevention system

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SLIDE 14

Computer Center, CS, NCTU

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Human Errors

 豬隊友 XD  Training  Alpha Stage  Release Procedure

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SLIDE 15

Computer Center, CS, NCTU

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Q & A

Any