David Toribio

Ultima versión de root.cache

En ocasiones nos surge la duda sobre si tenemos la verisón buena del root cache, la mejor maneraasegurarnos el tiro es preguntarle a un root-server por la lista completa:

-bash-3.00# dig @a.root-servers.net. . ns

; < <>> DiG 9.2.4 < <>> @a.root-servers.net. . ns
; (2 servers found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER< <- opcode: QUERY, status: NOERROR, id: 40901
;; flags: qr aa rd; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;. IN NS

;; ANSWER SECTION:
. 518400 IN NS I.ROOT-SERVERS.NET.
. 518400 IN NS J.ROOT-SERVERS.NET.
. 518400 IN NS K.ROOT-SERVERS.NET.
. 518400 IN NS L.ROOT-SERVERS.NET.
. 518400 IN NS M.ROOT-SERVERS.NET.
. 518400 IN NS A.ROOT-SERVERS.NET.
. 518400 IN NS B.ROOT-SERVERS.NET.
. 518400 IN NS C.ROOT-SERVERS.NET.
. 518400 IN NS D.ROOT-SERVERS.NET.
. 518400 IN NS E.ROOT-SERVERS.NET.
. 518400 IN NS F.ROOT-SERVERS.NET.
. 518400 IN NS G.ROOT-SERVERS.NET.
. 518400 IN NS H.ROOT-SERVERS.NET.

;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET. 3600000 IN A 198.41.0.4
A.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:ba3e::2:30
B.ROOT-SERVERS.NET. 3600000 IN A 192.228.79.201
C.ROOT-SERVERS.NET. 3600000 IN A 192.33.4.12
D.ROOT-SERVERS.NET. 3600000 IN A 128.8.10.90
E.ROOT-SERVERS.NET. 3600000 IN A 192.203.230.10
F.ROOT-SERVERS.NET. 3600000 IN A 192.5.5.241
F.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:2f::f
G.ROOT-SERVERS.NET. 3600000 IN A 192.112.36.4
H.ROOT-SERVERS.NET. 3600000 IN A 128.63.2.53
H.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:1::803f:235
I.ROOT-SERVERS.NET. 3600000 IN A 192.36.148.17
J.ROOT-SERVERS.NET. 3600000 IN A 192.58.128.30
J.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:c27::2:30

;; Query time: 122 msec
;; SERVER: 198.41.0.4#53(198.41.0.4)
;; WHEN: Mon Jun 2 10:03:11 2008
;; MSG SIZE rcvd: 500

-bash-3.00#

si queremos usarlo directamente pues hacemos un simple:

dig @a.root-servers.net. . ns >root.cache