通过SSH密钥进行服务器身份验证失败

Question

我试图在我的服务器（CentOS）上设置私钥/公钥身份验证。下面是我做的步骤：生成的公钥/私钥对用的puttygen

复制公钥到服务器

1. ，并与cat命令将文件/root/.ssh/authorized_keys追加它
2. 经过建议的文件的所有权和权限的.ssh（700）和的.ssh/authorized_keys的（600）
3. 重新启动sshd服务
4. 在所连接> SSH>验证的腻子配置，所选择的隐私键

但是当我尝试与Putty连接时，我收到消息“服务器拒绝我们的密钥”。我被提示输入密码，然后运行。

我也提出了认证日志级别，这里是输出一个失败的尝试：

Aug 30 12:55:01 localhost sshd[44558]: debug3: fd 5 is not O_NONBLOCK 
Aug 30 12:55:01 localhost sshd[44558]: debug1: Forked child 44752. 
Aug 30 12:55:01 localhost sshd[44558]: debug3: send_rexec_state: entering fd = 8 config len 803 
Aug 30 12:55:01 localhost sshd[44558]: debug3: ssh_msg_send: type 0 
Aug 30 12:55:01 localhost sshd[44558]: debug3: send_rexec_state: done 
Aug 30 12:55:01 localhost sshd[44752]: debug3: oom_adjust_restore 
Aug 30 12:55:01 localhost sshd[44752]: Set /proc/self/oom_score_adj to 0 
Aug 30 12:55:01 localhost sshd[44752]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8 
Aug 30 12:55:01 localhost sshd[44752]: debug1: inetd sockets after dupping: 3, 3 
Aug 30 12:55:01 localhost sshd[44752]: Connection from 91.15.164.238 port 58557 on 82.165.78.188 port 22 
Aug 30 12:55:01 localhost sshd[44752]: debug1: Client protocol version 2.0; client software version PuTTY_Release_0.70 
Aug 30 12:55:01 localhost sshd[44752]: debug1: no match: PuTTY_Release_0.70 
Aug 30 12:55:01 localhost sshd[44752]: debug1: Enabling compatibility mode for protocol 2.0 
Aug 30 12:55:01 localhost sshd[44752]: debug1: Local version string SSH-2.0-OpenSSH_6.6.1 
Aug 30 12:55:01 localhost sshd[44752]: debug2: fd 3 setting O_NONBLOCK 
Aug 30 12:55:01 localhost sshd[44752]: debug3: ssh_sandbox_init: preparing rlimit sandbox 
Aug 30 12:55:01 localhost sshd[44752]: debug2: Network child is on pid 44753 
Aug 30 12:55:01 localhost sshd[44752]: debug3: preauth child monitor started 
Aug 30 12:55:01 localhost sshd[44752]: debug1: SELinux support disabled [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: privsep user:group 74:74 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: permanently_set_uid: 74/74 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: list_hostkey_types: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: SSH2_MSG_KEXINIT sent [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: SSH2_MSG_KEXINIT received [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: none,[email protected] [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: none,[email protected] [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: first_kex_follows 0 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: reserved 0 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,rsa2048-sha256,rsa1024-sha1,diffie-hellman-group1-sha1 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: ssh-rsa,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-dss [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: aes256-ctr,aes256-cbc,[email protected],aes192-ctr,aes192-cbc,aes128-ctr,aes128-cbc,[email protected],blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc,arcfour256,arcfour128 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: aes256-ctr,aes256-cbc,[email protected],aes192-ctr,aes192-cbc,aes128-ctr,aes128-cbc,[email protected],blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc,arcfour256,arcfour128 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha1,hmac-sha1-96,hmac-md5,[email protected],[email protected],[email protected],[email protected] [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha1,hmac-sha1-96,hmac-md5,[email protected],[email protected],[email protected],[email protected] [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: none,zlib [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: none,zlib [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: first_kex_follows 0 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_parse_kexinit: reserved 0 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: mac_setup: setup hmac-sha2-256 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: kex: client->server aes256-ctr hmac-sha2-256 none [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: mac_setup: setup hmac-sha2-256 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: kex: server->client aes256-ctr hmac-sha2-256 none [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: kex: [email protected] need=32 dh_need=32 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_send entering: type 120 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive_expect entering: type 121 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive entering [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:01 localhost sshd[44752]: debug3: monitor_read: checking request 120 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_send entering: type 121 
Aug 30 12:55:01 localhost sshd[44752]: debug1: kex: [email protected] need=32 dh_need=32 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_send entering: type 120 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive_expect entering: type 121 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive entering [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:01 localhost sshd[44752]: debug3: monitor_read: checking request 120 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_send entering: type 121 
Aug 30 12:55:01 localhost sshd[44752]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_key_sign entering [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_send entering: type 6 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive_expect entering: type 7 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive entering [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:01 localhost sshd[44752]: debug3: monitor_read: checking request 6 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_answer_sign 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_answer_sign: signature 0x7f0b70e15390(271) 
Aug 30 12:55:01 localhost sshd[44752]: debug3: mm_request_send entering: type 7 
Aug 30 12:55:01 localhost sshd[44752]: debug2: monitor_read: 6 used once, disabling now 
Aug 30 12:55:01 localhost sshd[44752]: debug2: kex_derive_keys [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: set_newkeys: mode 1 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: SSH2_MSG_NEWKEYS sent [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: expecting SSH2_MSG_NEWKEYS [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug2: set_newkeys: mode 0 [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: SSH2_MSG_NEWKEYS received [preauth] 
Aug 30 12:55:01 localhost sshd[44752]: debug1: KEX done [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug1: userauth-request for user root service ssh-connection method none [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug1: attempt 0 failures 0 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_getpwnamallow entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 8 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive_expect entering: type 9 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: monitor_read: checking request 8 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_pwnamallow 
Aug 30 12:55:04 localhost sshd[44752]: debug3: Trying to reverse map address 91.15.164.238. 
Aug 30 12:55:04 localhost sshd[44752]: debug2: parse_server_config: config reprocess config len 803 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 9 
Aug 30 12:55:04 localhost sshd[44752]: debug2: monitor_read: 8 used once, disabling now 
Aug 30 12:55:04 localhost sshd[44752]: debug2: input_userauth_request: setting up authctxt for root [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_start_pam entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 100 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_inform_authserv entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 4 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_inform_authrole entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 80 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug2: input_userauth_request: try method none [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: userauth_finish: failure partial=0 next methods="publickey,gssapi-keyex,gssapi-with-mic,password" [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: monitor_read: checking request 100 
Aug 30 12:55:04 localhost sshd[44752]: debug1: PAM: initializing for "root" 
Aug 30 12:55:04 localhost sshd[44752]: debug1: PAM: setting PAM_RHOST to "p5b0fa4ee.dip0.t-ipconnect.de" 
Aug 30 12:55:04 localhost sshd[44752]: debug1: PAM: setting PAM_TTY to "ssh" 
Aug 30 12:55:04 localhost sshd[44752]: debug2: monitor_read: 100 used once, disabling now 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: monitor_read: checking request 4 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_authserv: service=ssh-connection, style= 
Aug 30 12:55:04 localhost sshd[44752]: debug2: monitor_read: 4 used once, disabling now 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: monitor_read: checking request 80 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_authrole: role= 
Aug 30 12:55:04 localhost sshd[44752]: debug2: monitor_read: 80 used once, disabling now 
Aug 30 12:55:04 localhost sshd[44752]: debug1: userauth-request for user root service ssh-connection method publickey [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug1: attempt 1 failures 0 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug2: input_userauth_request: try method publickey [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug1: test whether pkalg/pkblob are acceptable [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_key_allowed entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 22 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive_expect entering: type 23 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: monitor_read: checking request 22 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_keyallowed entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_keyallowed: key_from_blob: 0x7f0b70e1ca10 
Aug 30 12:55:04 localhost sshd[44752]: debug1: temporarily_use_uid: 0/0 (e=0/0) 
Aug 30 12:55:04 localhost sshd[44752]: debug1: trying public key file /root/.ssh/authorized_keys 
Aug 30 12:55:04 localhost sshd[44752]: debug1: fd 4 clearing O_NONBLOCK 
Aug 30 12:55:04 localhost sshd[44752]: debug2: key_type_from_name: unknown key type '----' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing keytype 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: '---- BEGIN SSH2 PUBLIC KEY ----\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug2: key_type_from_name: unknown key type 'BEGIN' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing keytype 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: 'BEGIN SSH2 PUBLIC KEY ----\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug2: key_type_from_name: unknown key type 'Comment:' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing keytype 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: 'Comment: "rsa-key-20170830"\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '"rsa-key-20170830"\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: 'AAAAB3NzaC1yc2EAAAABJQAAAQEAkO9lXNIVuohGAOsCQy+NDIJv7a+a6z6ekmSp\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: 'HfFduHAvOadeX/HDidL1696CVOHjX8fJ7ITTCaFl2ljI06lobZ2baDAsezpMhut9\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: 'xmovTOmTJK3pOAI9E1S3Hmhum0QViFsE5oCiMHwZixLmWoeZt09ZwSZyQZAvtHTU\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: '73bviqiky/j2xYpG+5QKyViyCEAa6KbJKnGpLw8UTf0rEBhUES9wLBt4vU3AZuQd\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: 'evfZSr3lDBlCCdX3vyJJP8m4x3+8YMSvJSfKa9MErWpxjNE+4GMhyexNILSP+lgy\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: '5tqWIehpSekThkJLpi0KPvGiK/bm7oXMVNLN0KdLAf/MKUzB9w==\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing whitespace 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: '' 
Aug 30 12:55:04 localhost sshd[44752]: debug2: key_type_from_name: unknown key type '----' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing keytype 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: check options: '---- END SSH2 PUBLIC KEY ----\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug2: key_type_from_name: unknown key type 'END' 
Aug 30 12:55:04 localhost sshd[44752]: debug3: key_read: missing keytype 
Aug 30 12:55:04 localhost sshd[44752]: debug2: user_key_allowed: advance: 'END SSH2 PUBLIC KEY ----\r\n' 
Aug 30 12:55:04 localhost sshd[44752]: debug2: key not found 
Aug 30 12:55:04 localhost sshd[44752]: debug1: restore_uid: 0/0 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_answer_keyallowed: key 0x7f0b70e1ca10 is not allowed 
Aug 30 12:55:04 localhost sshd[44752]: Failed publickey for root from 91.15.164.238 port 58557 ssh2: RSA 4c:13:08:b4:06:eb:ea:98:54:69:50:3e:cf:22:9e:da 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 23 
Aug 30 12:55:04 localhost sshd[44752]: debug2: userauth_pubkey: authenticated 0 pkalg ssh-rsa [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: userauth_finish: failure partial=0 next methods="publickey,gssapi-keyex,gssapi-with-mic,password" [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug1: userauth-request for user root service ssh-connection method gssapi-with-mic [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug1: attempt 2 failures 1 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug2: input_userauth_request: try method gssapi-with-mic [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 42 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive_expect entering: type 43 [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering [preauth] 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_receive entering 
Aug 30 12:55:04 localhost sshd[44752]: debug3: monitor_read: checking request 42 
Aug 30 12:55:04 localhost sshd[44752]: debug1: Unspecified GSS failure. Minor code may provide more information\nKey table file '/etc/krb5.keytab' not found\n 
Aug 30 12:55:04 localhost sshd[44752]: debug3: mm_request_send entering: type 43 
Aug 30 12:55:04 localhost sshd[44752]: debug3: userauth_finish: failure partial=0 next methods="publickey,gssapi-keyex,gssapi-with-mic,password" [preauth] 

Answer 1

这是为什么它不工作的原因。随着大量的一步一步的教程建议，应该生成公钥文件，将其复制到服务器，然后再追加公共密钥到authorized_keys文件cat命令这样的文件：

cat id_rsa.mypublickey.pub >> ~/.ssh/authorized_keys

林我的情况我使用PuTTYgen来生成密钥。但生成的公钥文件（使用保存按钮时保存的文件）在语法上不适用于追加到authorized_keys。

为了得到一个正确格式化公钥串，复制&从的puttygen窗口中产生的片段并将其粘贴在的〜/ .ssh/authorized_keys文件一个新行。正确的格式设置的线条看起来是这样的，但是，语法允许的意见多，太：

ssh-rsa AAAAB3NzaEAAAAB/*...more letters...*/cPogeHB2XQBQ== rsa-key-20170831 

要获得，你可以与其他的ssh代理比腻子，可以使用的格式私钥使用PuTTYgen的转换选项并将密钥保存为OpenSSH格式。

随着用户ilansch建议，更全面的信息请访问：How to convert SSH keypairs generated using PuttyGen(Windows) into key-pairs used by ssh-agent and KeyChain(Linux)