Haciendo cache de las zonas externas

/var/lib/named/db.cache


.			5d3h18m14s IN NS  A.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  M.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  L.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  K.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  J.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  G.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  F.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  I.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  E.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  D.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  C.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  B.ROOT-SERVERS.NET.
.			5d3h18m14s IN NS  H.ROOT-SERVERS.NET.

A.ROOT-SERVERS.NET.	5w6d16h IN A	198.41.0.4
M.ROOT-SERVERS.NET.	5w6d16h IN A	202.12.27.33
L.ROOT-SERVERS.NET.	5w6d16h IN A	198.32.64.12
K.ROOT-SERVERS.NET.	5w6d16h IN A	193.0.14.129
J.ROOT-SERVERS.NET.	5w6d16h IN A	198.41.0.10
G.ROOT-SERVERS.NET.	5w6d16h IN A	192.112.36.4
F.ROOT-SERVERS.NET.	5w6d16h IN A	192.5.5.241
I.ROOT-SERVERS.NET.	5w6d16h IN A	192.36.148.17
E.ROOT-SERVERS.NET.	5w6d16h IN A	192.203.230.10
D.ROOT-SERVERS.NET.	5w6d16h IN A	128.8.10.90
C.ROOT-SERVERS.NET.	5w6d16h IN A	192.33.4.12
B.ROOT-SERVERS.NET.	5w6d16h IN A	128.9.0.107
H.ROOT-SERVERS.NET.	5w6d16h IN A	128.63.2.53