10. Отключившись от удаленного узла (команда logout), на локальном хосте сформировать зашифрованные ключи, воспользовавшись командой ssh-keygen.
ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/student/.ssh/id_rsa): /home/student/.ssh/id_rsa
/home/student/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/student/.ssh/id_rsa.
Your public key has been saved in /home/student/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:p5fIVSIIiCQ/c9rnWrzmEQOAIhIWmUil/hC9MRL77w4 student@521-01
The key's randomart image is:
+---[RSA 2048]----+
|*X*o. |
|X+*. . . |
|+=++o . . . . |
|. +*+. . o |
| o.o. + S o |
| o .+ + = . |
| E .= + o |
| oo.o . |
| o=o |
+----[SHA256]-----+
11. Используя команду scp с указанием места расположения файла публичного ключа на локальной системе (публичный ключ хранится в файле /home/student/.ssh/id_rsa.pub), произвести его передачу по шифрованному туннелю на удаленный узел в каталог /home/student_nn/.ssh/ и сохранить файл публичного ключа под именем authorized_keys.
12. Воспользовавшись командой ssh -l student_nn 172.16.100.88, снова сделать попытку подключения к удаленной системе. Отметить отличия в процедурах подключения и регистрации пользователя на удаленной системе по сравнению с аутентификацией по паролю.
ssh -l student_01 172.16.100.88
Linux opentest 2.6.26-2-686 #1 SMP Sun Mar 4 22:19:19 UTC 2012 i686
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
You have mail.
Last login: Thu Oct 14 16:58:41 2021 from 172.16.100.21
13. Аналогично, с помощью команды scp произвести повторную передачу текстового файла на удаленный узел. Убедиться в наличии переданной копии файла на удаленном хосте. Отметить отличия в процедуре передачи файла.
scp -v -o User=student_01 /home/student/lab_041.txt 172.16.100.88:/home/student_01/
Executing: program /usr/bin/ssh host 172.16.100.88, user (unspecified), command scp -v -t /home/student_01/
OpenSSH_7.9p1 Debian-9, OpenSSL 1.1.1b 26 Feb 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 172.16.100.88 [172.16.100.88] port 22.
debug1: Connection established.
debug1: identity file /home/student/.ssh/id_rsa type 0
debug1: identity file /home/student/.ssh/id_rsa-cert type -1
debug1: identity file /home/student/.ssh/id_dsa type -1
debug1: identity file /home/student/.ssh/id_dsa-cert type -1
debug1: identity file /home/student/.ssh/id_ecdsa type -1
debug1: identity file /home/student/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/student/.ssh/id_ed25519 type -1
debug1: identity file /home/student/.ssh/id_ed25519-cert type -1
debug1: identity file /home/student/.ssh/id_xmss type -1
debug1: identity file /home/student/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9p1 Debian-9
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH_5* compat 0x0c000002
debug1: Authenticating to 172.16.100.88:22 as 'student_01'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: umac-64@openssh.com compression: none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<3072<8192) sent
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:toYD69y6puKpyeDYai8x1vg92nxr2YcH57HBVaUzKBs
debug1: Host '172.16.100.88' is known and matches the RSA host key.
debug1: Found key in /home/student/.ssh/known_hosts:4
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 4294967296 blocks
debug1: Will attempt key: /home/student/.ssh/id_rsa RSA SHA256:p5fIVSIIiCQ/c9rnWrzmEQOAIhIWmUil/hC9MRL77w4
debug1: Will attempt key: /home/student/.ssh/id_dsa
debug1: Will attempt key: /home/student/.ssh/id_ecdsa
debug1: Will attempt key: /home/student/.ssh/id_ed25519
debug1: Will attempt key: /home/student/.ssh/id_xmss
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/student/.ssh/id_rsa RSA SHA256:p5fIVSIIiCQ/c9rnWrzmEQOAIhIWmUil/hC9MRL77w4
debug1: Server accepts key: /home/student/.ssh/id_rsa RSA SHA256:p5fIVSIIiCQ/c9rnWrzmEQOAIhIWmUil/hC9MRL77w4
debug1: Authentication succeeded (publickey).
Authenticated to 172.16.100.88 ([172.16.100.88]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: Sending environment.
debug1: Sending env LANG = ru_RU.UTF-8
debug1: Sending command: scp -v -t /home/student_01/
Sending file modes: C0644 23 lab_041.txt
lab_041.txt 0% 0 0.0KB/s --:-- ETASink: C0644 23 lab_041.txt
lab_041.txt 100% 23 42.8KB/s 00:00
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
Transferred: sent 3304, received 2888 bytes, in 0.0 seconds
Bytes per second: sent 306455.7, received 267870.5
debug1: Exit status 0
