Larry Liu <Larry.Liu at lagrace.org> wrote:
> Below is a nslookup result with "set debug". Does anyone have a full=20
> understanding for id=3D15 in line 3 ? Is the the 15th query from a=20
> particular client before the ttl, expiration day, or otherwise? Thanks.
It's "query-id", a 16-bit randomly choosen integer that is used for two t=
hings :
1/ match answers with the questions=20
2/ make it more difficult to inject false answers
> ------------
> Got answer:
> HEADER:
> opcode =3D QUERY, id =3D 15, rcode =3D NOERROR
> header flags: response, want recursion, recursion avail.
> questions =3D 1, answers =3D 0, authority records =3D 1, add=
itional =3D 0
> QUESTIONS:
> cnf.com, type =3D A, class =3D IN
> AUTHORITY RECORDS:
> -> cnf.com
> ttl =3D 7200 (2 hours)
> primary name server =3D dmrqs004.cnf.com
> responsible mail addr =3D dns_id.dmrqs004.cnf.com
> serial =3D 2003110400
> refresh =3D 3600 (1 hour)
> retry =3D 1800 (30 mins)
> expire =3D 604800 (7 days)
> default TTL =3D 7200 (2 hours)
> ------------
> Name: cnf.com
--=20
Peter H=E5kanson =20
IPSec Sverige ( At Gothenburg Riverside )
Sorry about my e-mail address, but i'm trying to keep spam out=
,
remove "icke-reklam" if you feel for mailing me. Thanx.