为什么不允许密码验证？

Question

我的ssh似乎现在只接受公钥认证.即使我确定/ etc/ssh/ssh_config中的"PasswordAuthentication"是肯定的.这是我的ssh日志.我想知道为什么在我的ssh中不允许密码验证？PS:我可以通过在命令行中添加"-o PubkeyAuthentication = no"来强制ssh使用密码验证.

markz@markz-hp6200:~$ ssh -l lab 10.19.170.114 -v
OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /home/markz/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 10.19.170.114 [10.19.170.114] port 22.
debug1: Connection established.
debug1: identity file /home/markz/.ssh/id_rsa type -1
debug1: identity file /home/markz/.ssh/id_rsa-cert type -1
debug1: identity file /home/markz/.ssh/id_dsa type -1
debug1: identity file /home/markz/.ssh/id_dsa-cert type -1
debug1: identity file /home/markz/.ssh/id_ecdsa type -1
debug1: identity file /home/markz/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1
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: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA d5:c0:00:1b:bf:54:56:a0:c6:68:6f:62:a4:1a:e3:e1
debug1: Host '10.19.170.114' is known and matches the ECDSA host key.
debug1: Found key in /home/markz/.ssh/known_hosts:10
debug1: ssh_ecdsa_verify: signature correct
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: Offering RSA public key: markz@markz-hp6200
debug1: Authentications that can continue: publickey,password
debug1: Offering RSA public key: markz@markz-hp6200
debug1: Authentications that can continue: publickey,password
debug1: Offering RSA public key: markz@markz-hp6200
debug1: Authentications that can continue: publickey,password
debug1: Offering RSA public key: markz@markz-hp6200
debug1: Authentications that can continue: publickey,password
debug1: Offering RSA public key: markz@markz-desktop
debug1: Authentications that can continue: publickey,password
debug1: Offering RSA public key: markz@markz-desktop
Received disconnect from 10.19.170.114: 2: Too many authentication failures for lab

Answer 1

SSH 客户端甚至不需要进行任何更改来尝试密码身份验证，因为所有身份验证尝试都用于您的公钥。

删除未使用的公钥，添加类似的内容

主机 * PubkeyAuthentication=no

通过在服务器端~/.ssh/config添加公钥来或实际上使用公钥身份验证。~/.ssh/authorized_keys

Answer 2

恐怕您的~/.ssh.

ssh似乎尝试首先使用每个可用的密钥，但目标机器只会接受 5 个身份验证请求，因此没有机会尝试密码身份验证。

移动或删除一些未使用的键，使“ ssh-add -l”中的键少于 5 个。