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在 sshd 服务器上禁用 rsh 登录

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在 sshd 服务器上禁用 rsh 登录

我有一台机器 192.168.110.170，我可以用 rsh 登录[电子邮件保护]在另一台机器 192.168.110.169 上。登录时，命令netstat | grep 169给出

tcp 0 0 主机名:ssh 192.168.110.169:33551 已建立

上面的主机名是 192.168.110.170 的主机名

看来 rsh 连接到了 ssh 服务器，我的问题是如何禁用它？我在 sshd_config 文件中没有找到任何配置，sshd_config 如下

# 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
#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 yes
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

当我使用 ,rsh 停止 192.168.10.170 上的 ssh 时service ssh stop出现错误

ssh：连接到主机 192.168.110.170 端口 22：连接被拒绝

如何在不停止服务器上的 ssh 的情况下禁用 rsh 连接到 ssh？

答案1

您在 sshd 配置中找不到任何内容，因为 OpenSSHd 不执行 rsh。

您的客户端上很可能rsh有一个指向二进制文件的符号链接ssh。

pi@esszimmer:~ $ ls -l `which rsh`
lrwxrwxrwx 1 root root 21 May 27  2016 /usr/bin/rsh -> /etc/alternatives/rsh
pi@esszimmer:~ $ ls -l /etc/alternatives/rsh
lrwxrwxrwx 1 root root 12 May 27  2016 /etc/alternatives/rsh -> /usr/bin/ssh

运行时rsh您实际上正在进行 SSH 连接。

另一个指示是命令的输出netcat，它显示您已连接到 SSH 端口。如果您通过 rsh 连接，它会显示为rsh而不是ssh。

你没什么可担心的。

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