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SCR/SCR2.1/TP13/solar-5-TP13-reponses.txt
Dimitri SOLAR b9c451e95c tkt
2025-03-24 11:36:01 +01:00

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I)
1)
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether e4:54:e8:a1:a5:1d brd ff:ff:ff:ff:ff:ff
altname enp0s31f6
inet 172.16.2.93/16 metric 1024 brd 172.16.255.255 scope global dynamic eno1
valid_lft 3485sec preferred_lft 3485sec
inet6 2a01:729:b9:1600:172:16:2:93/128 scope global dynamic noprefixroute
valid_lft 3927sec preferred_lft 2927sec
inet6 fe80::e654:e8ff:fea1:a51d/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:dd:43:58:0d brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
2)
ip a show lo
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
3)
ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
lo MTU 65536
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
eno1 MTU 1500
4)
ip link show eno1
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether e4:54:e8:a1:a5:1d brd ff:ff:ff:ff:ff:ff
altname enp0s31f6
inet 172.16.2.93/16 metric 1024 brd 172.16.255.255 scope global dynamic eno1
valid_lft 3174sec preferred_lft 3174sec
inet6 2a01:729:b9:1600:172:16:2:93/128 scope global dynamic noprefixroute
valid_lft 3656sec preferred_lft 2656sec
inet6 fe80::e654:e8ff:fea1:a51d/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
5)
arp
(Address Resolution Protocol)
ip neigh
172.16.1.21 dev eno1 lladdr bc:24:11:b9:46:17 STALE
172.16.3.214 dev eno1 lladdr 80:e8:2c:ef:5d:a0 STALE
fe80::c474:2dff:fee1:4ba dev eno1 lladdr c6:74:2d:e1:04:ba router STALE
fe80::82e8:2cff:feef:8859 dev eno1 lladdr 80:e8:2c:ef:88:59 STALE
fe80::be24:11ff:feb9:4617 dev eno1 lladdr bc:24:11:b9:46:17 STALE
fe80::82e8:2cff:feef:82cb dev eno1 lladdr 80:e8:2c:ef:82:cb STALE
fe80::e654:e8ff:fea1:a47d dev eno1 lladdr e4:54:e8:a1:a4:7d STALE
fe80::be24:11ff:fe24:8385 dev eno1 lladdr bc:24:11:24:83:85 STALE
fe80::be24:11ff:febf:46cd dev eno1 lladdr bc:24:11:bf:46:cd STALE
6)
ip -r neigh
eldacar.ssh.iut-fbleau.fr dev eno1 lladdr bc:24:11:39:55:bc STALE
gatekeeper.iut-fbleau.fr dev eno1 lladdr c6:74:2d:e1:04:ba REACHABLE
maiar.iut-fbleau.fr dev eno1 lladdr bc:24:11:1b:bd:58 STALE
ns3.iut-fbleau.fr dev eno1 lladdr bc:24:11:ee:64:1b STALE
salle222-15.iut-fbleau.fr dev eno1 lladdr 80:e8:2c:ef:88:59 STALE
eru.iut-fbleau.fr dev eno1 lladdr bc:24:11:ea:5d:e4 STALE
salle225-11.iut-fbleau.fr dev eno1 lladdr 80:e8:2c:ef:61:fc STALE
iluvatar.iut-fbleau.fr dev eno1 lladdr bc:24:11:24:83:85 REACHABLE
machine6.iut-fbleau.fr dev eno1 lladdr 42:59:8a:98:c7:80 STALE
salle231-10.iut-fbleau.fr dev eno1 lladdr e4:54:e8:a1:d6:c9 STALE
ns3.iut-fbleau.fr dev eno1 lladdr bc:24:11:ee:64:1b STALE
salle229-13.iut-fbleau.fr dev eno1 lladdr e4:54:e8:a1:a3:e2 STALE
salle224-13.iut-fbleau.fr dev eno1 lladdr 80:e8:2c:ef:87:44 STALE
iluvatar.iut-fbleau.fr dev eno1 lladdr bc:24:11:24:83:85 STALE
salle225-12.iut-fbleau.fr dev eno1 lladdr 80:e8:2c:ef:89:cf STALE
salle225-06.iut-fbleau.fr dev eno1 lladdr 80:e8:2c:ef:5d:98 STALE
anor.iut-fbleau.fr dev eno1 lladdr bc:24:11:91:d0:59 STALE
salle229-03.iut-fbleau.fr dev eno1 lladdr bc:24:11:b9:46:17 STALE
salle223-12.iut-fbleau.fr dev eno1 lladdr 80:e8:2c:ef:5d:a0 STALE
_gateway dev eno1 lladdr c6:74:2d:e1:04:ba router STALE
salle222-15 dev eno1 lladdr 80:e8:2c:ef:88:59 STALE
fe80::be24:11ff:feb9:4617 dev eno1 lladdr bc:24:11:b9:46:17 STALE
salle229-13 dev eno1 lladdr e4:54:e8:a1:a3:e2 STALE
salle224-06 dev eno1 lladdr 80:e8:2c:ef:82:cb STALE
salle231-05 dev eno1 lladdr e4:54:e8:a1:a4:7d STALE
fe80::be24:11ff:fe24:8385 dev eno1 lladdr bc:24:11:24:83:85 STALE
fe80::be24:11ff:febf:46cd dev eno1 lladdr bc:24:11:bf:46:cd STALE
gatekeeper:
gatekeeper.iut-fbleau.fr dev eno1 lladdr c6:74:2d:e1:04:ba REACHABLE
7)
ip r
default via 172.16.1.254 dev eno1 proto dhcp src 172.16.2.93 metric 1024
II)
2)
ip neigh get 172.16.2.94 dev [le nom de votre interface réseau](eno1)
tcpdump -i [le nom de votre interface réseau] -n -t host [notre ip] and host [celle que je vais pinger]
Dans notre exercice :
on ouvre 2 terminal le 1er avec tcpdump et le 2ème pour ping
tcpdump -i eno1 -n -t host 172.16.2.102 and host 172.16.2.94
ping -c1 172.16.294
tcpdump nous répond :
ARP, Request who-has 172.16.2.94 tell 172.16.2.102, length 28
ARP, Reply 172.16.2.94 is-at e4:54:e8:a1:a2:7b, length 46
IP 172.16.2.102 > 172.16.2.94: ICMP echo request, id 1, seq 1, length 64
IP 172.16.2.94 > 172.16.2.102: ICMP echo reply, id 1, seq 1, length 64
ARP, Request who-has 172.16.2.102 tell 172.16.2.94, length 46
ARP, Reply 172.16.2.102 is-at e4:54:e8:a1:a3:d9, length 28
Il utilise ARP pour savoir qui est 172.16.2.94 puis après on ping
on utlise après la commande tcpdump -i eno1 -nte host 172.16.2.102 a,d host 172.16.2.94
puis on reping 172.16.2.94
tcpdump nous réponds :
e4:54:e8:a1:a3:d9 > e4:54:e8:a1:a2:7b, ethertype IPv4 (0x0800), length 98: 172.16.2.102 > 172.16.2.94: ICMP echo request, id 2, seq 1, length 64
e4:54:e8:a1:a2:7b > e4:54:e8:a1:a3:d9, ethertype IPv4 (0x0800), length 98: 172.16.2.94 > 172.16.2.102: ICMP echo reply, id 2, seq 1, length 64
e4:54:e8:a1:a2:7b > e4:54:e8:a1:a3:d9, ethertype ARP (0x0806), length 60: Request who-has 172.16.2.102 tell 172.16.2.94, length 46
e4:54:e8:a1:a3:d9 > e4:54:e8:a1:a2:7b, ethertype ARP (0x0806), length 42: Reply 172.16.2.102 is-at e4:54:e8:a1:a3:d9, length 28
e4:54:e8:a1:a3:d9 > e4:54:e8:a1:a2:7b, ethertype ARP (0x0806), length 42: Request who-has 172.16.2.94 tell 172.16.2.102, length 28
e4:54:e8:a1:a2:7b > e4:54:e8:a1:a3:d9, ethertype ARP (0x0806), length 60: Reply 172.16.2.94 is-at e4:54:e8:a1:a2:7b, length 46
Maintenant avec Tshark :
tshark -i eno1 -f host 172.16.2.102 and host 172.16.2.98
ping -c1 172.16.2.98
1 0.000000000 Dell_a1:a3:d9 → Broadcast ARP 42 Who has 172.16.2.98? Tell 172.16.2.102
2 0.000553922 Dell_a1:a3:a4 → Dell_a1:a3:d9 ARP 60 172.16.2.98 is at e4:54:e8:a1:a3:a4
3 0.000558520 172.16.2.102 → 172.16.2.98 ICMP 98 Echo (ping) request id=0x0007, seq=1/256, ttl=64
4 0.001271871 172.16.2.98 → 172.16.2.102 ICMP 98 Echo (ping) reply id=0x0007, seq=1/256, ttl=64 (request in 3)
5 5.173610111 Dell_a1:a3:a4 → Dell_a1:a3:d9 ARP 60 Who has 172.16.2.102? Tell 172.16.2.98
6 5.173663401 Dell_a1:a3:d9 → Dell_a1:a3:a4 ARP 42 172.16.2.102 is at e4:54:e8:a1:a3:d9
III)
1.
lo = 172.0.0.1
Sur 2 terminal on fait
tcpdump -i lo -nyvl | tee tracepinglo.txt
ping -c 1 -s 9216 127.0.0.1
IP (tos 0x0, ttl 64, id 29002, offset 0, flags [DF], proto ICMP (1), length 9244)
127.0.0.1 > 127.0.0.1: ICMP echo request, id 12, seq 1, length 9224
IP (tos 0x0, ttl 64, id 29003, offset 0, flags [none], proto ICMP (1), length 9244)
127.0.0.1 > 127.0.0.1: ICMP echo reply, id 12, seq 1, length 9224
2.
On refait la même chose mais avec la carte raison
tcpdump -i eno1 -ntvl host 172.16.2.102 and host 172.16.2.98 |tee tracepingeno1.txt
[solar@salle231-04 TP13]$ tcpdump -i eno1 -ntvl host 172.16.2.102 and host 172.16.2.98 | tee tracepingeno1.txt
tcpdump: listening on eno1, link-type EN10MB (Ethernet), snapshot length 262144 bytes
IP (tos 0x0, ttl 64, id 29021, offset 0, flags [+], proto ICMP (1), length 1500)
172.16.2.102 > 172.16.2.98: ICMP echo request, id 13, seq 1, length 1480
IP (tos 0x0, ttl 64, id 29021, offset 1480, flags [+], proto ICMP (1), length 1500)
172.16.2.102 > 172.16.2.98: ip-proto-1
IP (tos 0x0, ttl 64, id 29021, offset 2960, flags [+], proto ICMP (1), length 1500)
172.16.2.102 > 172.16.2.98: ip-proto-1
IP (tos 0x0, ttl 64, id 29021, offset 4440, flags [+], proto ICMP (1), length 1500)
172.16.2.102 > 172.16.2.98: ip-proto-1
IP (tos 0x0, ttl 64, id 29021, offset 5920, flags [+], proto ICMP (1), length 1500)
172.16.2.102 > 172.16.2.98: ip-proto-1
IP (tos 0x0, ttl 64, id 29021, offset 7400, flags [+], proto ICMP (1), length 1500)
172.16.2.102 > 172.16.2.98: ip-proto-1
IP (tos 0x0, ttl 64, id 29021, offset 8880, flags [none], proto ICMP (1), length 364)
172.16.2.102 > 172.16.2.98: ip-proto-1
IP (tos 0x0, ttl 64, id 30448, offset 0, flags [+], proto ICMP (1), length 1500)
172.16.2.98 > 172.16.2.102: ICMP echo reply, id 13, seq 1, length 1480
IP (tos 0x0, ttl 64, id 30448, offset 1480, flags [+], proto ICMP (1), length 1500)
172.16.2.98 > 172.16.2.102: ip-proto-1
IP (tos 0x0, ttl 64, id 30448, offset 2960, flags [+], proto ICMP (1), length 1500)
172.16.2.98 > 172.16.2.102: ip-proto-1
IP (tos 0x0, ttl 64, id 30448, offset 4440, flags [+], proto ICMP (1), length 1500)
172.16.2.98 > 172.16.2.102: ip-proto-1
IP (tos 0x0, ttl 64, id 30448, offset 5920, flags [+], proto ICMP (1), length 1500)
172.16.2.98 > 172.16.2.102: ip-proto-1
IP (tos 0x0, ttl 64, id 30448, offset 7400, flags [+], proto ICMP (1), length 1500)
172.16.2.98 > 172.16.2.102: ip-proto-1
IP (tos 0x0, ttl 64, id 30448, offset 8880, flags [none], proto ICMP (1), length 364)
172.16.2.98 > 172.16.2.102: ip-proto-1
ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 172.16.2.102 tell 172.16.2.98, length 46
ARP, Ethernet (len 6), IPv4 (len 4), Reply 172.16.2.102 is-at e4:54:e8:a1:a3:d9, length 28
ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 172.16.2.98 tell 172.16.2.102, length 28
ARP, Ethernet (len 6), IPv4 (len 4), Reply 172.16.2.98 is-at e4:54:e8:a1:a3:a4, length 46
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