How does power failure cause DoS?

workfrom925workfrom925 Posts: 196Member
I read in a security chapter at Cisco Netacademy: "To reduce the possibility of DoS due to a power failure, install an uninterruptible power supply (UPS) and keep spare components available." My question is, how does power failure cause DoS? The system would be down.

Comments

  • TechGuy215TechGuy215 CISSP, CEH, CHFI, CCNA: R&S, CCNA: Security, ITIL-F, LPIC-1, A+, Network+, Security+, Linux+, Projec Philadelphia, PAPosts: 404Member ■■■■□□□□□□
    If the system is down legitimate users can't access servers/resources. So technically is a DOS.
    * Currently pursuing: PhD: Information Security and Information Assurance
    * Certifications: CISSP, CEH, CHFI, CCNA:Sec, CCNA:R&S, CWNA, ITILv3, VCA-DCV, LPIC-1, A+, Network+, Security+, Linux+, Project+, and many more...
    * Degrees: MSc: Cybersecurity and Information Assurance; BSc: Information Technology - Security; AAS: IT Network Systems Administration
  • emerald_octaneemerald_octane Posts: 613Member
    Thats also why it's important that our AAA facilities are redundant and protected. If we can't authorize we can DoS ourselves based on the same principal as above.
  • Carpe PorcusCarpe Porcus ■■□□□□□□□□ Posts: 84Member ■■□□□□□□□□
    I read in a security chapter at Cisco Netacademy: "To reduce the possibility of DoS due to a power failure, install an uninterruptible power supply (UPS) and keep spare components available." My question is, how does power failure cause DoS? The system would be down.

    So you are asking if the hardware is unavailable, will this deny service to those who use it?

    Pretty self explanatory really. The service has been denied albeit malicious from an outside (or even inside attack) or by hardware failure. Regardless of the cause, the result is the same. You can't use what isn't available so the service has been denied.
    “I'm always admitting I'm wrong. That's how I eventually get to right.”
  • FLEOHBFLEOHB ■■□□□□□□□□ Posts: 33Member ■■□□□□□□□□
    I think its inportant to note the quote just says "DoS" (Denial of Service) not a "DoS attack" (someone broke it to your network and is making things no longer work)
Sign In or Register to comment.