[Internet-e-architetture-di-rete] ancora su resolver e autoritativi

[Abigail Bianconi]

Buonasera Antonio,

invio il mio esercizio sperando di non aver commesso troppi errori.

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1. | qual e' il RR IN MX per il nome a dominio gnu.org.?

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dig gnu.org IN MX +shor
10 eggs.gnu.org.

dig @8.8.8.8 gnu.org IN MX +shor
10 eggs.gnu.org.

dig @ns1.gnu.org gnu.org IN MX +shor
10 eggs.gnu.org.


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2. | qual e' il RR IN AAAA di $1?

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dig 10 eggs.gnu.org IN AAAA +shor
2001:4830:134:3::10

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3.| qual e' il RR IN PTR di $2?

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2001:4830:134:3::10
NXDOMAIN

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4. | qual e' un RR IN NS di com.?

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dig com. IN NS +shor
f.gtld-servers.net.
h.gtld-servers.net.
j.gtld-servers.net.
e.gtld-servers.net.
i.gtld-servers.net.
k.gtld-servers.net.
c.gtld-servers.net.
l.gtld-servers.net.
b.gtld-servers.net.
a.gtld-servers.net.
d.gtld-servers.net.
m.gtld-servers.net.
g.gtld-servers.net.

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5. | qual e' il RR IN A di $4?

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dig a.gtld-servers.net IN A +short
192.5.6.30
dig b.gtld-servers.net IN A +short
192.33.14.30
dig c.gtld-servers.net IN A +short
192.26.92.30
dig d.gtld-servers.net IN A +short
192.31.80.30
dig e.gtld-servers.net IN A +short
192.12.94.30
dig f.gtld-servers.net IN A +short
192.35.51.30
dig g.gtld-servers.net IN A +short
192.42.93.30
dig h.gtld-servers.net IN A +short
192.54.112.30
dig i.gtld-servers.net IN A +short
192.43.172.30
dig l.gtld-servers.net IN A +short
192.41.162.30
dig m.gtld-servers.net IN A +short
192.55.83.30
dig k.gtld-servers.net IN A +short
192.52.178.30
dig j.gtld-servers.net IN A +short

192.48.79.30

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6. | qual e' il RR IN PTR di $5?

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dig -x 192.5.6.30 IN PTR +shor
a.gtld-servers.net.

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7. | qual e' il RR IN PTR di 114.19.0.193.in-addr.arpa.?

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dig 114.19.0.193.in-addr.arpa IN PTR +shor
mahimahi.ripe.net.

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8. | qual e' il dominio in-addr.arpa. Per 127.0.0.1?

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1


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9. | qual e' il dominio ip6.arpa. per fe80::e6ce:8ff:2:1?

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NXDOMAIN

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10.| qual e' il RR IN A di mail.comune.osimo.an.it?

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dig mail.comune.osimo.an.it IN A +shor
217.58.27.54

dig @8.8.8.8 mail.comune.osimo.an.it IN A +shor
217.58.27.54

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11.| qual e' il RR IN PTR di $10?

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dig -x 217.58.27.54 IN PTR +shor
host54-27-static.58-217-b.business.telecomitalia.it.

dig @8.8.8.8 -x 217.58.27.54 IN PTR +shor
host54-27-static.58-217-b.business.telecomitalia.it.

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12.| qual e' il RR IN A di $11?

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dig host54-27-static.58-217-b.business.telecomitalia.it IN A +shor

217.58.27.54


dig @8.8.8.8 host54-27-static.58-217-b.business.telecomitalia.it IN A +shor

217.58.27.54

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13.| qual e' il RR IN TXT di comune.osimo.an.it?

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dig comune.osimo.an.it IN TXT +shor
"v=spf1 a:mail.comune.osimo.an.it a:gina.fabersoft.it -all"

dig @dns0.fabersoft.it comune.osimo.an.it IN TXT +shor
"v=spf1 a:mail.comune.osimo.an.it a:gina.fabersoft.it -all"

dig @8.8.8.8 comune.osimo.an.it IN TXT +shor
"v=spf1 a:mail.comune.osimo.an.it a:gina.fabersoft.it -all"

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14.| qual e' il RR IN RRSIG di RR IN AAAA di as112.net.?

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dig as112.net IN AAAA +dnssec +shor
2001:4f8:3:2bc::198
AAAA 8 2 3600 20160515101102 20160415091102 24264 as112.net.
2CltUuuClRPawhgtjt7lDTm7Kru21veaxDw1/J9EkWLSU6u0Cq+lLd8Z ODGmKtyuivJFmYRB
iuRObe2ylNgPNM03Vf/0K9eutmRm/pb/0Is9TyBL
UsF4/PIleR7qb5fw8vBW9a5t80/8D7lW4CrVNu6mgU4lWEWBE5b8wxX/ O+U=


<< PERCHÈ SONO DISCORDANTI?>>

dig @ns2.ottix.net as112.net IN AAAA +dnssec +shor
2620:ff:c000::198


AAAA 8 2 300 20160616101101 20160517091101 24264 as112.net.
SJ+iy4/pX/w85bMw59R0pBK0cbdOx5zmGjVVV5upE+z9cGSWU9IUDPvL KjzUb1ryBCs2loo9h
64v8UEpwKhx0PllHQNeHsCGG046JO0ikShpes7Y
uK7r4W+e7JLVuJWGnZGAHihP3fPKg6U9XlcH8IUhcva/Jz0utEBgdZnp htg=

dig @8.8.8.8 as112.net IN AAAA +dnssec +shor
SERVERFAIL

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15. Se volessi inviare una e-mail al responsabile della zona
org, a quale indirizzo dovrei inviarla?

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dig org. IN SOA +shor
a0.org.afilias-nst.info. noc.afilias-nst.info. 2011995103 1800 900 604800
86400

noc at afilias-nst.info


Buona serata e grazie.

Abigail
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