General discussion


DNS Cache Problem - Should stop dns client service?

By Changeez ·
in my network i've a windows 2003 domain controller and dns service on it. everything is going well. now that i decided to create couple of cnames for my mail server named "Mail" , "SMTP","POP" i faced the following problem: i can ping them for a very short time (about 5 minutes). after that all ping request fails : Ping request could not find host Mail. Please check the name and try again.Until i restart dns client services . when i totally disable dns client service there will be no problem at all but it's impossible to go behind every clients to disable this service.
by the way, nslookup can always resolve these cname , even when ping cannot.

i'm open to hear your answers. thanks

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Repost this in the Q&A Forum

by HAL 9000 Moderator In reply to DNS Cache Problem - Shoul ...

Try reposting this in the 'Q&A' forum. The 'Discussion' forum is for matters of general discussion, not specific problems in search of a solution. The 'Water Cooler' is for non-technical discussions. You can submit a question to 'Q&A' here:;content

There are TR members who specifically seek out problems in need of a solution. Although there is some overlap between the forums, you'll find more of those members in 'Q&A' than in 'Discussions' or 'Water Cooler'.

Be sure to use the voting buttons to provide your feedback. Voting a '+' does not necessarily mean that a given response contained the complete solution to your problem, but that it served to guide you toward it. This is intended to serve as an aid to those who may in the future have a problem similar to yours. If they have a ready source of reference available, perhaps won't need to repeat questions previously asked and answered. If a post did contain the solution to your problem, you can also close the question by marking the helpful post as "The Answer".

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Have you considered simply flushing the local resolver caches?

by seanferd In reply to DNS Cache Problem - Shoul ...

If that doesn't work, you probably have old information overriding your CNAMEs somewhere in the network.

No, you don't need to keep the DNS Client Service running, but it cuts down on queries to the DNS server during the TTL of the stored record.

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