Date: Fri, 14 Jan 2005 13:41:15 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: relax think <relax_n_think@yahoo.com.cn> Cc: freebsd-questions@freebsd.org Subject: Re: DNS: querying route DNS Message-ID: <41E7CBFB.1090603@infracaninophile.co.uk> In-Reply-To: <20050114131018.68217.qmail@web15703.mail.cnb.yahoo.com> References: <20050114131018.68217.qmail@web15703.mail.cnb.yahoo.com>
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relax think wrote:
> i want to query root servers directly instead of my ISP dns and for tht have used couple of commands
> like " tracert " and route through (RT) but wasnt able to query root server directly ,
> if u know how to directly query root server thn plz help
Use dig(1). Eg. to see the nameservers that the cn domain is delegated
to try:
% dig @f.root-servers.net cn IN NS
Although I can't really see much point in doing this -- the root servers
will only return actual answers to queries about top level domains (see
http://www.iana.org/cctld/cctld-whois.htm and
http://www.iana.org/gtld/gtld.htm ) -- otherwise, and the vast majority
of the time, they'll just tell you to go and bother some other
nameserver which has data about the next level down the domain hierarchy.
If your ISPs nameservers are unreliable or overloaded, and not giving
you a good service, then one course of action you might consider is just
configuring the named(8) built into your FreeBSD system to do recursive
DNS lookups for you. (And caching -- but that's a given for any sort of
DNS server). If you (or anyone) is interested I'll be happy to post a
HowTo to the list.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 8 Dane Court Manor
School Rd
PGP: http://www.infracaninophile.co.uk/pgpkey Tilmanstone
Tel: +44 1304 617253 Kent, CT14 0JL UK
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