resolving domain basis1.de and basis1.com - DNS newbie

[Kevin Darcy]

Uwe Disch wrote:

>Hello,
>
>recently I discovered that I have problems in resolving basis1.de and
>basis1.com (It's a domain of a local company). I'm running bind 8.2.2
>as DNS for intranet and as cache for internet.
>
>If I do a "nslookup basis1.com" on the dns then bind is telling me:
>
>
>Server:  someserver.somecompany.com
>Address:  192.168.10.10
>
>*** someserver.somecompany.com can't find basis1.com: Non-existent
>host/domain
>
>
>If I do a "nslookup basis1.com dummy-dns.dummy-domain.com" afterwards,
>bind returns:
>
>
>*** Can't find server address for 'dummy-dns.dummy-domain.com': Unknown
>host
>
>Server:  someserver.somecompany.com
>Address:  192.168.10.10
>
>Non-authoritative answer:
>Name:    basis1.com
>Address:  62.146.78.226
>
>
>Whow! 
>
I think you would have had the same results if you just ran the same 
nslookup command twice. What's happening on the second nslookup command 
is that it's giving up on the dummy name and going back to your default 
nameserver. So it's effectively no different than if you had just 
repeated the first command.

Ultimately, the root cause of your problem is most likely the lack of 
"query restart" in BIND 8. Under some conditions, BIND 8 loses track of 
certain information it needs to resolve a query, and when this happens, 
it just gives up on the query, hoping that the client will retry the 
query again and that the partial information it already obtained in 
connection with the first resolution attempt, plus information obtained 
by some number of queries on the second resolution attempt, will allow 
it to complete the whole resolution process and get an answer back to 
the client. BIND 9 has "query restart" so the fact that you're having 
problems with BIND 8 in this regard constitutes a good reason to 
consider an upgrade.

>From now on it's working fine for some hours. 
>
It works until the the relevant information times out of the 
nameserver's cache. Then the whole sequence starts over again.

                                                                         
                                       - Kevin