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p1100i
Asked: 2012-02-22 16:39:48 +0800 CST

Whats the difference for DNS servers if there is the www subdomain

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I've got a VPS, and a domain. The domain was associated with a host/hosting service by a company (provided LAMP) before, when i had enough from them, so i changed the DNS records to my VPS ip adress on the domain admin page of the company.

All works fine now, except if i use the adress with the www subdomain. I added 3 records:

<domainname>.<country> VPS-ip
*.<domainname>.<country> VPS-ip
www.<domainname>.<country> VPS-ip

The first two gets resolved with the right adress, but last one not. Does the www resolved somehow else? Or does it take some time to cascade it top the top?

domain-name-system ip domain vps

2 Answers

  1. Your wildcard-entry (*) will match every single request made.

    Try looking up pauska-is-a-beautiful-man.domain.tld, you'll be surprised :)

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  2. Best Answer

    To answer your last question: "Or does it take some time to cascade it top the top?"

    Yes (if I've understood your question correctly), if the www subdomain previously existed, you'd have to wait for the record to propagate between the nameservers as well for TTL to expire. Since no other DNS servers could possibly cache ALL records matching *.domain.tld, that one is easier to verify.

    For example I doubt mathias-is-an-even-more-beautiful-man.domain.tld has ever been queried, and thus never cached (= no wait for TTL to expire). The www subdomain is more likely to have been queried and cached recently :-)

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