[Internet-e-architetture-di-rete] esercizi riepilogativi governance, IPv4, IPv6, routing
Mauro Angiolillo
m.angiolillo at comuneap.gov.it
Sat May 7 20:09:25 CEST 2016
Salve prof, provo a risolvere uno degli esercizi assegnati (uno in particolare ha attirato la mia
attenzione :):
Il 04/05/16 11:30, Antonio Prado via Internet-e-architetture-di-rete ha scritto:
> ##############################################################
> siano dati i seguenti indirizzi IP:
>
> 203.114.102.100
> 2a03:2880:f001:1f:face:b00c::25de
> 23.50.139.33
> 2001:5008:101:289::2768
> 62.149.188.210
> 193.108.205.15
> 178.236.6.27
> 2001:67c:2e8:22::c100:68b
> 2001:760:0:158::2
> 2001:1900:3001:11::31
>
> rispondere ai quesiti (incollando la riga di comando) per ciascun IP:
>
> A. qual e' l'INET(6)NUM di appartenenza?
> B. da quale RIR e' rilasciato?
> C. qual e' l'AS di origine?
> D. incollare il relativo oggetto AUT-NUM
> E. commenti e osservazioni
> ##############################################################
Svolgimento:
IPV6: 2a03:2880:f001:1f:face:b00c::25de
Interrogando il database whois dello iana per sapere da chi è stata rilasciata la risorsa:
[gandalf at gondor:~] whois -I 2a03:2880:f001:1f:face:b00c::25de
% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object
inet6num: 2a00:0:0:0:0:0:0:0/12
organisation: RIPE NCC
status: ALLOCATED
whois: whois.ripe.net
changed: 2006-10-03
source: IANA
Ok, interrogo il database del RIPE, trattandosi di roba loro:
[gandalf at gondor:~] whois -r 2a03:2880:f001:1f:face:b00c::25de
inet6num: 2a03:2880::/29
netname: IE-FACEBOOK-201100822
descr: Facebook Ireland Ltd
Diamo un'occhiata al database del radb:
[gandalf at gondor:~] whois -m 2a03:2880:f001:1f:face:b00c::25de
route6: 2a03:2880:f001::/48
descr: Facebook, Inc.
origin: AS32934
mnt-by: MAINT-AS32934
changed: dsp at fb.com 20130911 #03:09:41Z
source: RADB
Quindi sentiamo cosa sappiamo di questo AS:
[gandalf at gondor:~] whois -I AS32934
% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object
refer: whois.arin.net
as-block: 32861-33566
organisation: Assigned by ARIN
whois: whois.arin.net
descr: Assigned by ARIN
source: IANA
[gandalf at gondor:~] whois -a AS32934
ASNumber: 32934
ASName: FACEBOOK
ASHandle: AS32934
RegDate: 2004-08-24
Updated: 2012-02-24
Comment: Please send abuse reports to abuse at facebook.com
Ref: https://whois.arin.net/rest/asn/AS32934
OrgName: Facebook, Inc.
OrgId: THEFA-3
Address: 1601 Willow Rd.
City: Menlo Park
StateProv: CA
PostalCode: 94025
Country: US
RegDate: 2004-08-11
Updated: 2012-04-17
Ref: https://whois.arin.net/rest/org/THEFA-3
OrgTechHandle: OPERA82-ARIN
OrgTechName: Operations
OrgTechPhone: +1-650-543-4800
OrgTechEmail: noc at fb.com
OrgTechRef: https://whois.arin.net/rest/poc/OPERA82-ARIN
OrgAbuseHandle: OPERA82-ARIN
OrgAbuseName: Operations
OrgAbusePhone: +1-650-543-4800
OrgAbuseEmail: noc at fb.com
OrgAbuseRef: https://whois.arin.net/rest/poc/OPERA82-ARIN
RNOCHandle: OPERA82-ARIN
RNOCName: Operations
RNOCPhone: +1-650-543-4800
RNOCEmail: noc at fb.com
RNOCRef: https://whois.arin.net/rest/poc/OPERA82-ARIN
RAbuseHandle: OPERA82-ARIN
RAbuseName: Operations
RAbusePhone: +1-650-543-4800
RAbuseEmail: noc at fb.com
RAbuseRef: https://whois.arin.net/rest/poc/OPERA82-ARIN
RTechHandle: OPERA82-ARIN
RTechName: Operations
RTechPhone: +1-650-543-4800
RTechEmail: noc at fb.com
RTechRef: https://whois.arin.net/rest/poc/OPERA82-ARIN
Da quello che ho potuto osservare, la risorsa numerica è stata assegnata dal RIPE, mentre l'AS dall'ARIN.
Possiamo ricavare qualche informazione specifica riguardo l'AS a: http://bgp.he.net/AS32934
Scendendo maggiormente nel dettaglio dell'host:
[gandalf at gondor:~] ping6 -c 3 2a03:2880:f001:1f:face:b00c::25de
PING6(56=40+8+8 bytes) 2001:b07:2ec:6f88:6cee:5f06:7999:c58c --> 2a03:2880:f001:1f:face:b00c::25de
16 bytes from 2a03:2880:f001:1f:face:b00c::25de, icmp_seq=0 hlim=51 time=220.584 ms
16 bytes from 2a03:2880:f001:1f:face:b00c::25de, icmp_seq=1 hlim=51 time=236.035 ms
16 bytes from 2a03:2880:f001:1f:face:b00c::25de, icmp_seq=2 hlim=51 time=226.462 ms
Ok, l'host risponde ai ping
[gandalf at gondor:~] dig -x 2a03:2880:f001:1f:face:b00c::25de +short
edge-star-mini6-shv-01-sea1.facebook.com.
[gandalf at gondor:~] dig edge-star-mini6-shv-01-sea1.facebook.com. aaaa +short
2a03:2880:f001:1f:face:b00c::25de
Reverse dns e hostname corrispondono...
[gandalf at gondor:~] nc -nz -6 2a03:2880:f001:1f:face:b00c::25de 80
Connection to 2a03:2880:f001:1f:face:b00c::25de port 80 [tcp/*] succeeded!
[gandalf at gondor:~] nc -nz -6 2a03:2880:f001:1f:face:b00c::25de 443
Connection to 2a03:2880:f001:1f:face:b00c::25de port 443 [tcp/*] succeeded!
[gandalf at gondor:~] nc -nz -6 2a03:2880:f001:1f:face:b00c::25de 843
Connection to 2a03:2880:f001:1f:face:b00c::25de port 843 [tcp/*] succeeded!
Le porte tcp 80 e 443 (http e https) risultano aperte (e funzionanti), da cui deduco che l'host
in questione è (anche) un server web (o, molto probabilmente, un load-balancer).
Sperando di non aver fatto troppi errori (portando fuori pista i miei compagni di corso),
auguro a tutti una buona serata.
Mauro
--
Dott. Ing. Mauro Angiolillo
Linux Registered User #343216
GnuPG-Key fingerprint = 90A3 3F92 6008 7383 A569 E952 CF97 383B 63F6 F425
-*-
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