允许无需身份验证即可访问 openssh 服务器

Question

首先，这不是我所经历过的所有线程的重复，并且解决方案对 OP 不起作用，或者对我没有用。

我想允许特定用户无需经过身份验证即可使用运行 openssh 的 ssh 服务器。无需密码，也无需密钥。

用户无权访问系统 shell。用户将使用服务器作为 socks 代理。

我已经尝试了相关线程中描述的所有方法，ssh 服务器要么需要公钥，要么要求用户输入从出生起就没有的密码。

此时我的 sshd_config 中已删除所有用户的匹配项。使用此设置，只有拥有密钥且密钥已添加到 authorized_keys 列表中的用户才能访问服务器。

Include /etc/ssh/sshd_config.d/*.conf

# Port and ListenAddress options are not used when sshd is socket-activated,
# which is now the default in Ubuntu.  See sshd_config(5) and
# /usr/share/doc/openssh-server/README.Debian.gz for details.
Port 22000
Protocol 2
AddressFamily inet
ListenAddress 0.0.0.0

#ListenAddress ::

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

LoginGraceTime 30
PermitRootLogin no
StrictModes yes
MaxAuthTries 300
MaxSessions 100

PubkeyAuthentication yes

# Expect .ssh/authorized_keys2 to be disregarded by default in future.
AuthorizedKeysFile      .ssh/authorized_keys .ssh/authorized_keys2

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
PermitEmptyPasswords no

# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
KbdInteractiveAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the KbdInteractiveAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via KbdInteractiveAuthentication may bypass
# the setting of "PermitRootLogin prohibit-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and KbdInteractiveAuthentication to 'no'.
UsePAM no

AllowAgentForwarding yes
AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
PrintMotd no
PrintLastLog no
#TCPKeepAlive yes
PermitUserEnvironment yes
Compression yes
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /run/sshd.pid
#MaxStartups 10:30:100
PermitTunnel yes
#ChrootDirectory none
#VersionAddendum none

# no default banner path
Banner /home/plutus/Documents/banner.txt

# Allow client to pass locale environment variables
AcceptEnv LANG LC_*

# override default of no subsystems
Subsystem       sftp    /usr/lib/openssh/sftp-server