ทุกครั้งที่ฉันใช้เซิร์ฟเวอร์ระยะไกลฉันต้องระบุรหัสผ่าน ฉันคัดลอกกุญแจสาธารณะของฉัน (id_dsa.pub) ไปยังเซิร์ฟเวอร์ระยะไกลโดยใช้:
ssh-copy-id -i id_dsa.pub user@server
ฉันตรวจสอบว่ามีการเพิ่มอย่างถูกต้องใน authorized_keys สิทธิ์ของไฟล์ / ไดเรกทอรีทั้งหมดถูกต้อง:
~user 755
~user/.ssh 700
~user/.ssh/authorized_keys 640
~user/.ssh/id_dsa.pub 644
ฟิลด์ PasswordAuthentication ใน / etc / ssh / sshd_config ถูกตั้งค่าเป็นใช่ ฉันใส่ sshd ในโหมดดีบักและเพิ่มสวิตช์ verbose ลงในคำสั่ง ssh ฉันได้รับความประทับใจว่าเซิร์ฟเวอร์ไม่ได้พยายามใช้ id_pub.dsa เนื่องจากบรรทัด
Skipping ssh-dss key: ........... not in PubkeyAcceptedKeyTypes
ไม่มีแผ่นดิสก์ที่เข้ารหัสทางฝั่งเซิร์ฟเวอร์ แนวคิดใดที่จะก้าวหน้า นี่คือข้อมูลการดีบัก ssh daemon:
sudo /usr/sbin/sshd -d
====
debug1: sshd version OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type DSA
debug1: private host key: #1 type 2 DSA
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type ECDSA
debug1: private host key: #2 type 3 ECDSA
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-d'
Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from xxx port 63521 on yyy port 22
debug1: Client protocol version 2.0; client software version OpenSSH_7.1
debug1: match: OpenSSH_7.1 pat OpenSSH* compat 0x04000000
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3
debug1: permanently_set_uid: 115/65534 [preauth]
debug1: list_hostkey_types: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: client->server chacha20-poly1305@openssh.com <implicit> none [preauth]
debug1: kex: server->client chacha20-poly1305@openssh.com <implicit> none [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user damian service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: PAM: initializing for "damian"
debug1: PAM: setting PAM_RHOST to "freebox-server.local"
debug1: PAM: setting PAM_TTY to "ssh"
Connection closed by xxxx [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
นี่คือเอาต์พุต ssh verbose:
$ ssh -v user@server
OpenSSH_7.1p1, OpenSSL 1.0.2d 9 Jul 2015
debug1: Connecting to server [xxxx] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_rsa-cert type -1
debug1: identity file /home/user/.ssh/id_dsa type 2
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3 pat OpenSSH_6.6.1* compat 0x04000000
debug1: Authenticating to server:22 as 'user'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client chacha20-poly1305@openssh.com <implicit> none
debug1: kex: client->server chacha20-poly1305@openssh.com <implicit> none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:v4BNHM0Q33Uh6U4VHenA9iJ0wEyi8h0rFVetbcXBKqA
debug1: Host 'server' is known and matches the ECDSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:2
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/id_rsa
debug1: Skipping ssh-dss key /home/user/.ssh/id_dsa for not in PubkeyAcceptedKeyTypes
debug1: Trying private key: /home/user/.ssh/id_ecdsa
debug1: Trying private key: /home/user/.ssh/id_ed25519
debug1: Next authentication method: password
user@server's password:
1
ดูsuperuser.com/q/1016989/93541สำหรับปัญหาเดียวกัน (และเป็นวิธีแก้ปัญหาเดียวกัน)
—
DW
โปรดทราบว่าหาก sshd_config บนปลายทางมีPubkeyAuthentication noคุณจะได้รับพร้อมท์ให้ใส่รหัสผ่านเสมอ ตั้งค่าเป็นใช่และรีสตาร์ท sshd (บนโฮสต์ปลายทาง) เพื่อเปิดใช้งานการรับรองความถูกต้อง pubkey
—
C. Kelly