# 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
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 768
# Logging
SyslogFacility AUTH
LogLevel INFO
# Authentication:
LoginGraceTime 120
PermitRootLogin without-password
StrictModes yes
AllowGroups admins clients
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
Subsystem sftp internal-sftp
Match group clients
ChrootDirectory /var/chroot-home
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp
一个虚拟用户
root:~# tail -n1 /etc/passwd david:x:1000:1001::/david:/bin/sh
现在在这种情况下david可以使用say filezilla客户端sftp,并且他被chroot到/ var / chroot-home / david /.但是,如果我要设置无密码身份验证呢？我已经尝试将他的密钥粘贴在/var/chroot-home/david/.ssh/authorized_keys中但没有用,尝试ssh’ing作为大卫到框中它只是停在“debug1：发送env LC_CTYPE = C”后我供应它的密码并没有在auth.log中显示,可能是因为它无法找到homedir.如果我以root身份“su – david”,我会看到“没有目录,使用HOME = /登录”这是有道理的. Symlink也没有帮助.
我也尝试过：
Match group clients
ChrootDirectory /var/chroot-home/%u
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp
一个虚拟用户
root:~# tail -n1 /etc/passwd david:x:1000:1001::/var/chroot-home/david:/bin/sh
这样,如果我不将/ var / chroot-home / david更改为root：root sshd抱怨错误的所有权或权限模式,如果我这样做,david不能再直接在他的家中上传/删除任何东西,同时使用sftp FileZilla的.
解决方法
第二点需要注意的是：在你的第一个设置中,当david登录时,他在/ var / chroot-home / david中启动,但他实际上是chroot到/ var / chroot-home,这意味着如果他输入cd ..他可以看到所有其他家庭目的(虽然不是他们的内容,如果权限是正确的).这对你来说可能是也可能不是问题,但要注意这是一件好事.
如果以上情况适合你,你可以使用你的第一个sshd_config,在passwd文件中将david的home目录设置为/ var / chroot-home / david,并添加以下符号链接,以便david仍然在他的主目录中启动：
cd /var/chroot-home mkdir var ln -s .. var/chroot-home
该符号链接将确保您可以使用相同的路径到达主目录,无论您是否在chroot中.
但是,如果您不希望客户端看到彼此主目录的名称,则需要chroot到主目录本身,就像在第二个解决方案中一样.但正如您所见,sshd并不喜欢(因为出于各种微妙的原因,给用户写入文件系统根目录的访问权限是危险的).可悲的是,你在这里几乎没有运气.一个(kludgy)解决方案是在每个主目录中创建一个文件/子目录,并为客户端提供对该目录的写访问权.
另一种选择可能是chroot到/ var / chroot-home,并且不同地命名主目录,例如使用用户ID号而不是名称.
