How to check DNS 'health'?

Discussion in 'other security issues & news' started by Carbonyl, Aug 19, 2010.

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  1. Carbonyl

    Carbonyl Registered Member

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    Hi everyone,

    I've got a simple, stupid question that I'm sorry to clutter the forum with - unfortunately, I don't know the answer, or know who to ask!

    Last night for some reason Google and all related services went down for me, and I can verify, most other people using the same ISP in a close area around me. The rest of the web was accessible - it was only Google that gave us problems. This morning, things are working again - But GMail seems very sluggish. Logging in to GMail (via bookmark) seemed okay, if slow, but it gave me weird messages upon logout. I clicked to log out of my account, and got a message about how I had been logged out because someone on another computer had logged into my account - Strangely, I logged back in immediately, and didn't see any unfamiliar IPs in my record log.

    My long winded question is, how do I check to ensure my DNS server is still pointing me toward the right Google services? Since I saw the same 'blackout' and slow access across multiple computers (Windows, OS X, and Linux), the only thing I can think of that might be happening is a DNS hijack to point all these various machines to a malicious 'phishing' version of GMail. However, I have no idea how to verify if my DNS server is 'healthy' or 'poisioned'. Thanks for any help!
     
    Last edited: Aug 19, 2010
  2. funkydude

    funkydude Registered Member

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  3. LODBROK

    LODBROK Guest

  4. Carbonyl

    Carbonyl Registered Member

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    Thank you both very much. These links are extremely helpful! I appreciate it.
     
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