• randy

    Nice list. I’ve weeded people out before with the ping, tracert, and http vs html questions before. Good stuff!

    • Ilango Al

      amazing list of questions!!!

  • randy

    Nice list. I’ve weeded people out before with the ping, tracert, and http vs html questions before. Good stuff!

  • Scott

    My favorite question is “Prove to me you can protect my network”. Poor candidates begin speaking about technology and solutions, good candidates talk about their previous experience, and great candidates take a high level view of the issue and speak about how they will help promote change, get management on board and begin to address the true scope of this open ended question.

  • Scott

    My favorite question is “Prove to me you can protect my network”. Poor candidates begin speaking about technology and solutions, good candidates talk about their previous experience, and great candidates take a high level view of the issue and speak about how they will help promote change, get management on board and begin to address the true scope of this open ended question.

  • Mark Gamache

    This is great stuff! I’ve had to argue with seasoned security professionals about DH being subject to MITM. A great follow up on that, they they miss it, is have them whiteboard for you how it works and then watch to see how they react when you white board the key switch. If you see the light bulb go on, they may still be OK. Even professionals take the pre-established trust of a local keystore for granted.

  • Mark Gamache

    This is great stuff! I’ve had to argue with seasoned security professionals about DH being subject to MITM. A great follow up on that, they they miss it, is have them whiteboard for you how it works and then watch to see how they react when you white board the key switch. If you see the light bulb go on, they may still be OK. Even professionals take the pre-established trust of a local keystore for granted.

  • The Real Steve C

    Nice list, lol

  • The Real Steve C

    Nice list, lol

  • http://curtis.lassam.net/ Curtis Lassam

    I sniff the external connection using tcpdump on port 80. Do I see any connections to IP 4.2.2.2?

    Roll a d20.

    A one? You don’t see any connections to IP 4.2.2.2.

  • http://curtis.lassam.net Curtis Lassam

    I sniff the external connection using tcpdump on port 80. Do I see any connections to IP 4.2.2.2?

    Roll a d20.

    A one? You don’t see any connections to IP 4.2.2.2.

  • http://arik.baratz.org/ Arik

    A network analysis D&D? Ouch.

    Nice list, Daniel. I think you should float all the easy questions to the top, so that you can vet the incompetent early in the process.

    What I like to ask a candidate is “what are you best at? what do people come to you about when they need help?” and then drill down into the bits and bytes on that topic. That shows me if they take what they do seriously enough to have an in-depth understanding of it. Also, at some point in time my questions inevitably exceed their knowledge (I might ask about things I don’t know about…) and then I expect them to tell me they don’t know and will find out. If they try to BS me… NEXT!

    Also as mentioned I like to ask about the bigger picture, what does it all mean from an organizational point of view.

    – Arik

  • http://arik.baratz.org Arik

    A network analysis D&D? Ouch.

    Nice list, Daniel. I think you should float all the easy questions to the top, so that you can vet the incompetent early in the process.

    What I like to ask a candidate is “what are you best at? what do people come to you about when they need help?” and then drill down into the bits and bytes on that topic. That shows me if they take what they do seriously enough to have an in-depth understanding of it. Also, at some point in time my questions inevitably exceed their knowledge (I might ask about things I don’t know about…) and then I expect them to tell me they don’t know and will find out. If they try to BS me… NEXT!

    Also as mentioned I like to ask about the bigger picture, what does it all mean from an organizational point of view.

    – Arik

  • Daniel Miessler

    @Curtis Thank you for that.

  • Daniel Miessler

    @Curtis Thank you for that.

  • MR AKBAR

    VERY NICE LIST EXCELENT:

  • rathinapandi

    good stuff

  • rathinapandi

    good stuff

  • Hasib

    Diffie-Hellman is a Key-agreement scheme, it is not a Key-exchange scheme.

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  • dryanhawley

    Here is another question. “How do you keep up on hacker tools, and how do you test them?”.

    The lower skill level answer would be, “I don't! I swore I wouldn't associate with Hackers or use their tools when I got my CISSP!” The “better” IMO
    answer would be, “I use a sacrificial lamb computer to get them off The Net”
    (because a lot of hacker sites will, in fact, hack you while you get the tool).
    As for testing them, the best answer(s) might be “I test them in the SANS 504 class” (or at a hackers conventiuon, or I set up a disposable network at home (or in a detached lab) so as to not be the cause of bringing down production or personal computers. Bonus points for things like, “afterwards I do a 6 pass destructive format on my HD, including boot sectors, and reflash my BIOS from a LINUX booted OS disk, stuff like that.

    Reading about them on a security site shows less enthusiasm.

    “Know thy enemy”

    • Random Nerd…

      Create a sandbox environment.. :D

  • dryanhawley

    Here is another question. “How do you keep up on hacker tools, and how do you test them?”.

    The lower skill level answer would be, “I don't! I swore I wouldn't associate with Hackers or use their tools when I got my CISSP!” The “better” IMO
    answer would be, “I use a sacrificial lamb computer to get them off The Net”
    (because a lot of hacker sites will, in fact, hack you while you get the tool).
    As for testing them, the best answer(s) might be “I test them in the SANS 504 class” (or at a hackers conventiuon, or I set up a disposable network at home (or in a detached lab) so as to not be the cause of bringing down production or personal computers. Bonus points for things like, “afterwards I do a 6 pass destructive format on my HD, including boot sectors, and reflash my BIOS from a LINUX booted OS disk, stuff like that.

    Reading about them on a security site shows less enthusiasm.

    “Know thy enemy”

  • Jim

    Umm, I’m not a security expert (just a random unix admin), but I could answer all of those questions.

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  • Anonymous

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  • I. Ionescu

    Good list.

    Some of them I guess should be asked at every technical interview (like the ICMP one), some of them quite security specific. Thanks for putting this out for the community.

    I guess the thing we’d all expect from a candidate is “security judgement” skills.

    Regards

    Ionut

    PS: can you guys believe somebody actually thought it’s a good idea to spam us about Timerland boots .. on a security topic/ site? ….

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  • Anonymous

    I test them in the SANS 504 class” (or at a hackers conventiuon, or I set up a disposable network at home

    Car Auctions

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  • http://twitter.com/chiefmonkey Security Monkey

    I am witness to many interviews of infosec professionals. I’ve seen these exact questions (literally printed from your website) and asked VERY BADLY. It’s an important point that the interviewer fully understand and be able to answer these questions. Otherwise, using them is a waste. I witnessed a developer using these questions to interview an INFOSEC management candidate. He asked the candidate the ping/port questions and the candidate answered correctly immediately – ICMP. The interviewer said “no, you have to give me a tcp or udp port number”. The interviewee was clearly frustrated and rolling his eyes and trying to be polite. I eventually stepped in and told the interviewer to take a break and I’d finish the interview. Unreal!!!

    • http://danielmiessler.com/ Daniel Miessler

      Wow, that’s scary.

  • http://twitter.com/chiefmonkey Security Monkey

    I am witness to many interviews of infosec professionals. I’ve seen these exact questions (literally printed from your website) and asked VERY BADLY. It’s an important point that the interviewer fully understand and be able to answer these questions. Otherwise, using them is a waste. I witnessed a developer using these questions to interview an INFOSEC management candidate. He asked the candidate the ping/port questions and the candidate answered correctly immediately – ICMP. The interviewer said “no, you have to give me a tcp or udp port number”. The interviewee was clearly frustrated and rolling his eyes and trying to be polite. I eventually stepped in and told the interviewer to take a break and I’d finish the interview. Unreal!!!


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