我无法使用公私钥对登录。我可以使用密码访问。以下是服务器端和客户端的日志。为什么我无法登录？
type=CRYPTO_KEY_USER msg=audit(1481731455.027:102046): user pid=8859 uid=0 auid=0 ses=6158 msg='op=destroy kind=session fp=? direction=both spid=8860 suid=74 rport=59031 laddr=XX.XXX.XX.XXX lport=22 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=USER_ERR msg=audit(1481731455.028:102047): user pid=8859 uid=0 auid=0 ses=6158 msg='op=PAM:bad_ident acct="?" exe="/usr/sbin/sshd" hostname=YY.YYY.YY.YYY addr=YY.YYY.YY.YYY terminal=ssh res=failed'
type=CRYPTO_KEY_USER msg=audit(1481731455.028:102048): user pid=8859 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=6f:21:ce:5c:81:10:5e:63:db:32:54:71:80:bf:99:97 direction=? spid=8859 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=CRYPTO_KEY_USER msg=audit(1481731455.028:102049): user pid=8859 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=d7:a6:59:60:99:86:45:95:69:79:bf:ea:8a:fa:0a:46 direction=? spid=8859 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=USER_LOGIN msg=audit(1481731455.028:102050): user pid=8859 uid=0 auid=0 ses=6158 msg='op=login acct="user" exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=ssh res=failed'
type=CRYPTO_KEY_USER msg=audit(1481731455.707:102051): user pid=8862 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=6f:21:ce:5c:81:10:5e:63:db:32:54:71:80:bf:99:97 direction=? spid=8862 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=CRYPTO_KEY_USER msg=audit(1481731455.707:102052): user pid=8862 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=d7:a6:59:60:99:86:45:95:69:79:bf:ea:8a:fa:0a:46 direction=? spid=8862 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=CRYPTO_SESSION msg=audit(1481731455.708:102053): user pid=8861 uid=0 auid=0 ses=6158 msg='op=start direction=from-client cipher=aes128-ctr ksize=128 spid=8862 suid=74 rport=59032 laddr=XX.XXX.XX.XXX lport=22 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=CRYPTO_SESSION msg=audit(1481731455.708:102054): user pid=8861 uid=0 auid=0 ses=6158 msg='op=start direction=from-server cipher=aes128-ctr ksize=128 spid=8862 suid=74 rport=59032 laddr=XX.XXX.XX.XXX lport=22 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success'
type=USER_AUTH msg=audit(1481731455.764:102055): user pid=8861 uid=0 auid=0 ses=6158 msg='op=pubkey acct="user" exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=ssh res=failed'
以下是客户端的日志
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /home/user/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to XX.XXX.XX.XXX [XX.XXX.XX.XXX] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/identity type -1
debug1: identity file /home/user/.ssh/identity-cert type -1
debug1: identity file /home/user/.ssh/id_rsa type 1
debug1: identity file /home/user/.ssh/id_rsa-cert type -1
debug1: identity file /home/user/.ssh/id_dsa type -1
debug1: identity file /home/user/.ssh/id_dsa-cert type -1
debug1: identity file /home/user/.ssh/id_ecdsa type -1
debug1: identity file /home/user/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'XX.XXX.XX.XXX' is known and matches the RSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:6
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ ===================== +
+ !!! C A U T I O N !!! +
+ ===================== +
+ +
+ This system is for the use of authorized users only. +
+ Individuals using this computer system without authority, or in +
+ excess of their authority, are subject to having all of their +
+ activities on this system monitored and recorded by system +
+ personnel. +
+ In the course of monitoring individuals improperly using this +
+ system, or in the course of system maintenance, the activitie +
+ of authorized users may also be monitored. +
+ Anyone using this system expressly consents to such monitoring +
+ and is advised that if such monitoring reveals possible +
+ evidence of criminal activity, system personnel may provide the +
+ evidence of such monitoring to law enforcement officials. +
+ +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/identity
debug1: Offering public key: /home/user/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/user/.ssh/id_dsa
debug1: Trying private key: /home/user/.ssh/id_ecdsa
debug1: Next authentication method: password
[email protected]'s password:
可能是什么原因？但我无法从服务器日志中找出太多信息。
答案1
在读取目标主机上的公钥时，ssh 对目录和文件的权限非常挑剔。检查您尝试登录的机器上的以下权限：
- 您的主目录
~/应具有 755 (rwxr-xr-x) 或更低的权限 - 您的
~/.ssh目录还应具有 755 (rwxr-xr-x) 或更低的权限 - 您的
~/.ssh/authorized_keys或~/.ssh/authorized_keys2文件的权限应为 644 (rw-r--r--) 或更低。
当然，您也可能没有在目标的 authorized_keys 文件中保存正确的公钥。使用ssh-copy-id将密钥复制到目标，如下所示：
ssh-copy-id server.example.com
替换server.example.com为目标服务器的主机名。它会提示您输入密码，然后复制您的密钥。
答案2
需要注意的是，我遇到了 SElinux 上下文问题，我需要一个 restorecon -R .ssh ，可能有人（我 :) ）在使用 ssh-cop y-id 之前先创建了文件