Date: Tue, 5 Apr 2005 10:36:35 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Martin Petraschek <petraschek@ftw.at> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Viewing DNS cache entries Message-ID: <20050405153635.GC64927@dan.emsphone.com> In-Reply-To: <BLACKHOLEp3eEHJtfob000026f6@mail.ftw.at> References: <BLACKHOLEp3eEHJtfob000026f6@mail.ftw.at>
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In the last episode (Apr 05), Martin Petraschek said:
> The operating system is caching DNS name resolutions in order to
> avoid repeated DNS requests for the same hostname. Is it possible to
> display the entries of that DNS cache?
>
> Under Windows, the command "ipconfig /displaydns" exists, and I would
> need that functionality under FreeBSD.
You can use the "rndc dump" command, which will create a file that
contains all of the currently-cached DNS entries. If you are running a
chrooted named (default in 5.*), add this line to
/etc/namedb/named.conf in the options{} section:
dump-file "/var/dump/named_dump.db";
, then run "rndc reconfig" and "rndc dump". The dumpfile will end up
in /var/named/var/dump/named_dump.db.
--
Dan Nelson
dnelson@allantgroup.com
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