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DNS / IP Issues

Discussion in 'Bind / DNS / Nameserver Issues' started by Lycanthrope, Nov 13, 2003.

  1. Lycanthrope

    Lycanthrope Registered

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    Ok, I just spent the last 4 days going crazy chasing something I knew was there but couldn't prove, and learned a whole lot in the process. I figured this may come in handy for someone down the road, not that this will happen a lot, but if it does...

    I was given 2 IPs as part of a package and elected to have another 13 added. The first 2 days, (obviously spent creating / uploading sites), things were running smooth. All of a sudden the 13 "add-on" IPs started to resolve only when they wanted to. I chased the obvious and when that seemed fine sought the help of someone that knows a whole bunch more than I (Thank You B12org!).

    I updated everything per his instructions which cleaned up a bunch of config files that I of course butchered in the process, but things still weren't resolving. I then got rid of my CNAME entries and switched them to A entries, (another great tip), which turns out to the the only reason I was able to find out the real problem. After making these changes I did some tests on DNS reports and DNS stuff and low and behold my mail server was reporting to be host.someotherdomain.com.

    I did a DNS check on that domain and sure enough, his A entry for his host name pointed to what was supposed to be one of my IPs. This in itself of course doesn't mean anything, but when I entered the IP into my browser, I was taken to somebody else's home page.

    Turns out the IPs in my subnet were also given to another / others which of course - well, sucks.

    I will never again use CNAME entries again unless I absolutely have to. Had I not made these changes I'd still be going nuts because reverse DNS probes were only pointing to my data center and I would have never known this IP was trying to be resolved elsewhere.

    I finally have the issue resolved, well, when DNS does, it will be ;)
     
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