我试图从Debian服务器连接到Ubuntu服务器。 两者都是Azure上的虚拟机。
我可以连接到Ubuntu服务器，没有来自我的本地计算机（Mac）的问题。
我已经在Ubuntu VM的Azure设置中设置了Debian服务器的公钥。 我已经检查了Ubunty服务器上的authorized_keys文件，Debian公钥在那里。
当我尝试连接时，我得到相对普通的Permission denied (publickey)错误。 我已经阅读了很多关于serverfault，stackexchange和其他众多支持论坛的文章。 大多数提出与SSH相关的文件和文件夹权限相关的build议，以及所有权。 就我所知，我已经完成了所有的工作，但问题仍然存在。
以下是设置的一些信息:( IP地址和用户名已被遮盖）
ssh命令的结果：
OpenSSH_6.7p1 Debian-5+deb8u3, OpenSSL 1.0.1t 3 May 2016 debug1: Reading configuration data /home/jonathan/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to 52.XXX.XXX.144 [52.XXX.XXX.144] port 22. debug1: Connection established. debug1: identity file /home/jonathan/.ssh/id_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/jonathan/.ssh/id_rsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.7p1 Debian-5+deb8u3 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 pat OpenSSH* compat 0x04000000 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr [email protected] none debug1: kex: client->server aes128-ctr [email protected] none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 2f:e1:fa:17:6d:90:c3:d2:f6:09:28:99:7d:49:3e:8a debug1: Host '52.XXX.XXX.144' is known and matches the ECDSA host key. debug1: Found key in /home/jonathan/.ssh/known_hosts:2 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 debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/jonathan/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey). jonathan@workstation1:~/.ssh$ chmod 644 authorized_keys jonathan@workstation1:~/.ssh$ ssh -v -i ~/.ssh/id_rsa [email protected] OpenSSH_6.7p1 Debian-5+deb8u3, OpenSSL 1.0.1t 3 May 2016 debug1: Reading configuration data /home/jonathan/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to 52.XXX.XXX.144 [52.XXX.XXX.144] port 22. debug1: Connection established. debug1: identity file /home/jonathan/.ssh/id_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/jonathan/.ssh/id_rsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.7p1 Debian-5+deb8u3 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 pat OpenSSH* compat 0x04000000 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr [email protected] none debug1: kex: client->server aes128-ctr [email protected] none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 2f:e1:fa:17:6d:90:c3:d2:f6:09:28:99:7d:49:3e:8a debug1: Host '52.XXX.XXX.144' is known and matches the ECDSA host key. debug1: Found key in /home/jonathan/.ssh/known_hosts:2 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 debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/jonathan/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey).
Debian（local） ~/.ssh/ files的权限和所有权：
drwx------ 2 jonathan jonathan 4.0K Jul 11 12:57 . drwxr-xr-x 10 jonathan jonathan 4.0K Jul 11 11:38 .. -rw-r--r-- 1 jonathan jonathan 1.4K Jul 11 01:49 authorized_keys -rw-r--r-- 1 jonathan jonathan 131 Jul 11 13:01 config -rw------- 1 jonathan jonathan 3.3K Jul 11 12:25 id_rsa -rw-r--r-- 1 jonathan jonathan 751 Jul 11 12:25 id_rsa.pub -rwx------ 1 jonathan jonathan 223 Jul 11 13:24 known_hosts
我~/.ssh/config文件的内容：
Host azure-ubuntu-ksf Hostname 52.XXX.XXX.144 User USERNAME PubKeyAuthentication yes IdentityFile ~/.ssh/id_rsa
~/.ssh文件夹本身的权限：
drwx------ 2 jonathan jonathan 4.0K Jul 11 12:57 .ssh
我添加了我的id_rsa密钥到ssh-agent
jonathan@workstation1:~$ eval `ssh-agent` Agent pid 53351 jonathan@workstation1:~$ ssh-add ~/.ssh/id_rsa Enter passphrase for /home/jonathan/.ssh/id_rsa: Identity added: /home/jonathan/.ssh/id_rsa (/home/jonathan/.ssh/id_rsa)
这里是sshd_config的内容：
# Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key HostKey /etc/ssh/ssh_host_ed25519_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 1024 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin without-password StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes ClientAliveInterval 180 PasswordAuthentication no
服务器上auth.log的尾部
Jul 11 13:27:16 www sshd[52373]: User MYUSERNAME from 52.XXX.XXX.216 not allowed because none of user's groups are listed in AllowGroups Jul 11 13:27:16 www sshd[52373]: input_userauth_request: invalid user MYUSERNAME [preauth] Jul 11 13:27:16 www sshd[52373]: Connection closed by 52.XXX.XXX.216 port 49249 [preauth] Jul 11 13:29:45 www sshd[52381]: User MYUSERNAME from 52.XXX.XXX.216 not allowed because none of user's groups are listed in AllowGroups Jul 11 13:29:45 www sshd[52381]: input_userauth_request: invalid user MYUSERNAME [preauth] Jul 11 13:29:45 www sshd[52381]: Connection closed by 52.XXX.XXX.216 port 49382 [preauth] Jul 11 13:30:11 www sshd[52384]: Accepted publickey for jonathan from 218.185.229.5 port 50631 ssh2: RSA SHA256:MZ0VmU5IYI0nRz75N1qZ1i7vxsm5P0UuTdgnaPri8mQ Jul 11 13:30:11 www sshd[52384]: pam_unix(sshd:session): session opened for user jonathan by (uid=0) Jul 11 13:30:11 www systemd-logind[1359]: New session c10 of user jonathan. Jul 11 13:30:11 www systemd: pam_unix(systemd-user:session): session opened for user jonathan by (uid=0) Jul 11 13:32:16 www sudo: jonathan : TTY=pts/0 ; PWD=/home/MYUSERNAME ; USER=root ; COMMAND=/bin/ls .ssh Jul 11 13:32:16 www sudo: pam_unix(sudo:session): session opened for user root by jonathan(uid=0) Jul 11 13:32:16 www sudo: pam_unix(sudo:session): session closed for user root Jul 11 13:32:35 www sudo: jonathan : TTY=pts/0 ; PWD=/home/MYUSERNAME ; USER=root ; COMMAND=/bin/ls -lah .ssh Jul 11 13:32:35 www sudo: pam_unix(sudo:session): session opened for user root by jonathan(uid=0) Jul 11 13:32:35 www sudo: pam_unix(sudo:session): session closed for user root Jul 11 13:32:54 www sudo: jonathan : TTY=pts/0 ; PWD=/home/MYUSERNAME ; USER=root ; COMMAND=/bin/cat .ssh/authorized_keys Jul 11 13:32:54 www sudo: pam_unix(sudo:session): session opened for user root by jonathan(uid=0) Jul 11 13:32:54 www sudo: pam_unix(sudo:session): session closed for user root Jul 11 13:33:31 www sshd[52484]: fatal: Unable to negotiate with 41.238.56.8 port 56263: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth] Jul 11 13:33:32 www sshd[52486]: fatal: Unable to negotiate with 41.238.56.8 port 56267: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth] Jul 11 13:33:34 www sshd[52488]: fatal: Unable to negotiate with 41.238.56.8 port 56274: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth] Jul 11 13:33:38 www sshd[52490]: fatal: Unable to negotiate with 41.238.56.8 port 56283: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth] Jul 11 13:33:46 www sshd[52492]: fatal: Unable to negotiate with 41.238.56.8 port 56301: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth] Jul 11 13:34:45 www sshd[52496]: fatal: Unable to negotiate with 1.162.49.50 port 38855: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth] Jul 11 13:35:38 www sshd[52500]: fatal: Unable to negotiate with 220.170.196.198 port 47162: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth] Jul 11 13:44:34 www sshd[52523]: fatal: Unable to negotiate with 119.48.16.182 port 36725: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth] Jul 11 13:52:06 www sshd[52539]: User MYUSERNAME from 52.XXX.XXX.216 not allowed because none of user's groups are listed in AllowGroups Jul 11 13:52:06 www sshd[52539]: input_userauth_request: invalid user MYUSERNAME [preauth] Jul 11 13:52:06 www sshd[52539]: Connection closed by 52.XXX.XXX.216 port 50568 [preauth] Jul 11 13:55:32 www sshd[52551]: fatal: Unable to negotiate with 177.135.98.161 port 43336: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth]
本地虚拟机IP为52.XXX.XXX.216
服务器的IP是52.XXX.XXX.144
还有什么可以帮助看到的吗？
我一直试图解决这个2小时的最佳部分。 如果有人有任何有用的build议，我将不胜感激。
该线
不允许来自52.183.126.216的用户MYUSERNAME，因为没有用户的组在AllowGroups中列出
从你的sshd日志是进一步调查的东西。
如果你的sshd_config有这一行：
AllowGroups root admins sshusers sftponly
解决方法是将您的用户添加到服务器上的这些组中的一个。 sshusers将是我的合理select。 之后，login应该工作。