ssh服务器:只允许使用密钥登录

Question

我知道，这个问题已经问过好几次了。但是我试图设置一个ssh服务器。

我认为关键的设置是我必须设置PasswordAuthentication no。但我已经这么做了，重新启动了机器。但是我仍然可以用我的本地用户名和密码登录。

请找到我的sshd_config文件附件

# 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 no

# 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

Answer 1

看看这个答案，我认为这对你来说是最好的：禁用Ubuntu的SSH密码登录

我从这个答案中通过以下配置禁用密码登录

# Edit the following configs of the file: /etc/ssh/sshd_config
PermitRootLogin no # Disable root login,
                   # If I want to use root,
                   # I must login as user, then sudo su
ChallengeResponseAuthentication no # Default is no
PasswordAuthentication no          # Disable password login
AllowUsers user                    # Only allow the user account login
PubkeyAuthentication yes           # Only allow the public key login

Answer 2

只需将PasswordAuthentication设置为"no"，将"UsePAM“设置为"no”即可。然后确保重新加载sshd。

Answer 3

您将希望编辑sshd_config文件并重新启动ssh服务器。

• sudo vim /etc/ssh/sshd_config或gksudo gedit /etc/ssh/sshd_config
• 设置PasswordAuthentication no
• (建议使用PermitRootLogin no )
• sudo service ssh restart