How to get easily (from a script) all CNAME of a A record?
Matus UHLAR - fantomas
uhlar at fantomas.sk
Tue Nov 9 13:13:47 UTC 2010
On 09.11.10 14:01, Michelle Konzack wrote:
> does someone know, how to get easily all CNAME records for a Host?
>
> For example I have:
>
> vserver09.tamay-dogan.net. 604800 IN A 88.168.69.36
>
> www.can4linux.org. 86400 IN CNAME vserver09.tamay-dogan.net.
> www.fexray4linux.org. 86400 IN CNAME vserver09.tamay-dogan.net.
>
> So I have only the <vserver09> and want to know from a script the CNAMEs
> which mean, I need a revers search.
>
> How can I query this and which is the best (shell) tool?
>
> I mean, currently I have a spider script installed on the NS which I can
> run using 'ssh ${NS} query_script ${OPTS}' and on STDOUT I have what I
> need, but I like to get a better solution, since sometimes it dos not
> work with DNSSEC and with more then 80000 Domains and more than 1million
> hosts I run into timing problems.
I am not sure whether dnswalk over whole internet can do that, but on your
server you can either run recursive grep over named data directory, or dump
the named dsatabase and grep it...
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Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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