I handle DNS for a large government agency. We have a lot of remote offices who are connected by ISP instead of our WAN. In our case they would even stop resolving our whole domain. I have been handling these issues for over 2 years since I arrived here and often I was often blamed for these problems. I decided to get aggressive with ISPs and insist on being escalated to thier higher tiers.
I began to uncover over a years time that many of theses ISPs had this problem. Large ISPs would often not tell me what the fix was but it would simply get resolved after a few hours. One very large ISP told me to set up my remote offices to use a different DNS server, the one we were using was not supposed to be used acccording to their engineer. For curiousity sake I checked back with the old DNS server a week later and it was still up and not resolving anything in our domain. I have had to walk a DNS admin at a small 'mom and pop' ISP on how to use nslookup correctly. "What's dig?"
I have found that there are a lot of people out there running DNS who do not know what they are doing and/or do not care about how this affects their customers.
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I handle DNS for a large government agency. We have a lot of remote offices who are connected by ISP instead of our WAN. In our case they would even stop resolving our whole domain. I have been handling these issues for over 2 years since I arrived here and often I was often blamed for these problems. I decided to get aggressive with ISPs and insist on being escalated to thier higher tiers. I began to uncover over a years time that many of theses ISPs had this problem. Large ISPs would often not tell me what the fix was but it would simply get resolved after a few hours. One very large ISP told me to set up my remote offices to use a different DNS server, the one we were using was not supposed to be used acccording to their engineer. For curiousity sake I checked back with the old DNS server a week later and it was still up and not resolving anything in our domain. I have had to walk a DNS admin at a small 'mom and pop' ISP on how to use nslookup correctly. "What's dig?" I have found that there are a lot of people out there running DNS who do not know what they are doing and/or do not care about how this affects their customers.