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Is it possible to setup some DNS server where it will default to an IP address if the the host name it tries to resolve fails to resolve? I'm having a problem where a host name is intermittently failing to resolve.

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I'd suggest you're far better off dealing with the existing problem, DNS hacks will cause you a lot of pain down the line. Also, I'm not sure it's possible to set yourself up as authoritative for example.com, but only when example.com's name servers are off line. A temporary workaround could be to add a static entry to client hosts files while the NS is unreliable. –  SmallClanger Jan 18 '11 at 17:06
    
I concur with SmallClanger, you should fix the real problem. Maybe you can port here the problem and maybe we can help fix it. –  cwheeler33 Jan 18 '11 at 23:40
    
I'm using PayPal and am getting intermittent host name resolve failures. I'm not sure if this is isolated to our network or if it's specific to PayPal. A Google search has suggested other shared similar problems, but in the past. We are still experiencing it. –  Bradford Jan 19 '11 at 14:45
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1 Answer

What is the output of NSlookup? What are you using for a local DNS server? Who do you forward to? Have you cleared your cache (both server side and client side)?

Depending on the error with NSlookup, try specifying a different server - maybe Google's DNS servers 8.8.8.8 an see if there is a difference.

also more details about what you are trying to do when you start having problems would be helpful..

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