.mil domain root only hosted by one server??
Joe Abley
jabley at automagic.org
Wed Aug 21 19:59:40 UTC 2002
On Wed, Aug 21, 2002 at 03:46:22PM -0400, Vinny Abello wrote:
> I just stumbled across something I thought was interesting. All the .mil
> domain names used by the U.S. Military are served by one single root
> server.
[jabley at peppermill]% for n in a b c d e f g h i j k l m; do
for> dig @${n}.root-servers.net ns mil. | egrep -qi '^mil.*NS' && \
for cmdand> echo "${n}.root-servers.net provides a delegation for MIL."
for> done
a.root-servers.net provides a delegation for MIL.
b.root-servers.net provides a delegation for MIL.
c.root-servers.net provides a delegation for MIL.
d.root-servers.net provides a delegation for MIL.
e.root-servers.net provides a delegation for MIL.
f.root-servers.net provides a delegation for MIL.
g.root-servers.net provides a delegation for MIL.
h.root-servers.net provides a delegation for MIL.
i.root-servers.net provides a delegation for MIL.
j.root-servers.net provides a delegation for MIL.
k.root-servers.net provides a delegation for MIL.
l.root-servers.net provides a delegation for MIL.
m.root-servers.net provides a delegation for MIL.
[jabley at peppermill]% dig ns mil.
; <<>> DiG 8.3 <<>> ns mil.
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2
;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 5
;; QUERY SECTION:
;; mil, type = NS, class = IN
;; ANSWER SECTION:
mil. 23h59m24s IN NS PAC2.NIPR.mil.
mil. 23h59m24s IN NS A.ROOT-SERVERS.NET.
mil. 23h59m24s IN NS B.ROOT-SERVERS.NET.
mil. 23h59m24s IN NS E.ROOT-SERVERS.NET.
mil. 23h59m24s IN NS G.ROOT-SERVERS.NET.
mil. 23h59m24s IN NS H.ROOT-SERVERS.NET.
mil. 23h59m24s IN NS CON1.NIPR.mil.
mil. 23h59m24s IN NS CON2.NIPR.mil.
mil. 23h59m24s IN NS EUR1.NIPR.mil.
mil. 23h59m24s IN NS EUR2.NIPR.mil.
mil. 23h59m24s IN NS PAC1.NIPR.mil.
;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET. 6d23h59m20s IN A 198.41.0.4
B.ROOT-SERVERS.NET. 6d23h59m20s IN A 128.9.0.107
E.ROOT-SERVERS.NET. 6d23h59m21s IN A 192.203.230.10
G.ROOT-SERVERS.NET. 6d23h59m22s IN A 192.112.36.4
H.ROOT-SERVERS.NET. 6d23h59m22s IN A 128.63.2.53
;; Total query time: 93 msec
;; FROM: peppermill.automagic.org to SERVER: default -- 204.152.184.68
;; WHEN: Wed Aug 21 12:56:09 2002
;; MSG SIZE sent: 21 rcvd: 316
[jabley at peppermill]%
> I thought that was a bit odd. I'm sure that one server is more than
> enough to handle the queries for all the .mil domains with no problem, but
> it doesn't seem very redundant or safe at all.
All thirteen root servers contain delegations for MIL, and there
are eleven servers which will provide an authoritative response to
a query for SOA (of which five are also root servers).
Joe
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