Ubuntu11.04安装配置openssh-server

Ubuntu11环境oepnssh-server安装配置

1、环境：

Ubuntu11.04

 

2、安装

Ubuntu提供了便利的apt工具，采用在线安装依赖包将会自动下载并安装。

 

sudo apt-get install openssh-server

 

 

 

3、安装过程

    下载过程视网速而定，很小的317K，如果不拨号很速度。

 

4、启动、停止ssh服务

 

 

cd /etc/init.d
//启动ssh服务
service ssh start
//停止ssh服务
service ssh stop
//重启ssh服务
service ssh restart

 

 

5、查看是否启动

     如果有sshd服务说明ssh server已经启动，也可以直接start（别restart，这是重启），如果已经启动会提示。

 

 

ps -d|grep ssh

  或者

 

pidof sshd

 

 

6、高级技巧

     openssh-server安装后剩下的工作就是配置，配置信息位于sshd_config文件，一行一个配置，#开头的行表示注释。配置内容 key=value形式出现。

# Package generated configuration file
# See the sshd_config(5) manpage for details

# What ports, IPs and protocols we listen for
#监听端口，可以修改为其他端口默认22
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#监听IP，去掉注释标示监听所有ip地址
#ListenAddress 0.0.0.0
#协议版本号
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
#ssh登陆日志写入AUTH系统日志设备，建议级别：VERBOSE
LogLevel INFO

# Authentication:
#连接ubuntu120秒内登陆ssh，否则断开。
LoginGraceTime 120
#是否允许root登陆ssh，如果设置可能su root失败
PermitRootLogin yes
#设置SSH在接收登录请求之前是否检查用户家目录和rhosts文件的权限和所有权。防止目录和文件设置成任何人都有写权限
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
#设置是否打印最用户最后一次登陆时间。例如：Last login: Tue May 17 13:58:15 2011 from localhost
PrintLastLog yes
#是否发送心跳包
TCPKeepAlive yes
#UseLogin no

#MaxStartups 10:30:60
#激活警示条，警示未经许可用户登陆
#Banner /etc/issue.net

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

#配置外部子系统，参数为子系统名字、执行命令
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

  

 

 

参考：http://www.openbsd.org/cgi-bin/man.cgi?query=sshd_config&sektion=5