scr

SCR2.1/TP14/reponses.txt

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+1)
+On utilise la commande	ncat -u -l -v -p 50000
+
+Ncat: Version 7.94 ( https://nmap.org/ncat )
+Ncat: Listening on [::]:50000
+Ncat: Listening on 0.0.0.0:50000
+
+sur un autre terminal on utilise la commande ss -lnu
+
+UNCONN     0    0   0.0.0.0:50000   0.0.0.0:*
+
+
+2)
+
+dd if=/dev/zero of=ft-file.dat bs=1K count=9
+
+9+0 records in
+9+0 records out
+9216 bytes (9.2 kB, 9.0 KiB) copied, 0.0083619 s, 1.1 MB/s
+
+
+ls -lh ft-file.dat
+-rw-r--r-- 1 solar students23 9.0K Mar 12 14:52 ft-file.dat
+
+
+
+II)
+
+1)
+which traceroute
+which: no traceroute in (/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/opt/android-sdk/platform-tools:/opt/android-sdk/tools:/opt/android-sdk/tools/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl)
+
+which tracepath
+/usr/bin/tracepath
+
+cela signifie que tracepath existe et non traceroute
+
+2)
+tcpdump -vvv -i eno1 -f "host 172.16.3.198 and not tcp and not udp and not arp" -w tracepath-trace.txt
+
+ tracepath 8.8.8.8
+
+tcpdump -r tracepath-trace.txt
+
+3)
+-n permet d'afficher les ip numériques
+
+4)
+tcpdump -r tracepath-trace.txt |sed '/UDP.*$/a \\'
+
+a)
+