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Fedora23的SSH服务

发布时间:2015-12-18 10:42:43来源:linux网站作者:如果云知道

Fedora23的SSH服务是默认关闭的。

编辑/etc/ssh/sshd_config​

#       $OpenBSD: sshd_config,v 1.89 2013/02/06 00:20:42 dtucker Exp $

# This is the sshd server system-wide configuration file.  See

# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/local/bin:/usr/bin

# The strategy used for options in the default sshd_config shipped with

# OpenSSH is to specify options with their default value where

# possible, but leave them commented.  Uncommented options override the

# default value.

# If you want to change the port on a SELinux system, you have to tell

# SELinux about this change.

# semanage port -a -t ssh_port_t -p tcp #PORTNUMBER

#

Port 22

AddressFamily any

#ListenAddress 0.0.0.0

#ListenAddress ::

# The default requires explicit activation of protocol 1

#Protocol 2

# HostKey for protocol version 1

#HostKey /etc/ssh/ssh_host_key

# 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

# Lifetime and size of ephemeral version 1 server key

#KeyRegenerationInterval 1h

#ServerKeyBits 1024

# Logging

# obsoletes QuietMode and FascistLogging

#SyslogFacility AUTH

SyslogFacility AUTHPRIV

#LogLevel INFO

# Authentication:

#LoginGraceTime 2m

PermitRootLogin yes

#StrictModes yes

#MaxAuthTries 6

#MaxSessions 10

#RSAAuthentication yes

#PubkeyAuthentication yes

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2

# but this is overridden so installations will only check .ssh/authorized_keys

AuthorizedKeysFile      .ssh/authorized_keys

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none

#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts

#RhostsRSAAuthentication no

# similar for protocol version 2

#HostbasedAuthentication no

# Change to yes if you don't trust ~/.ssh/known_hosts for

# RhostsRSAAuthentication and 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 yes

PermitEmptyPasswords no

PasswordAuthentication yes

# Change to no to disable s/key passwords

#ChallengeResponseAuthentication yes

ChallengeResponseAuthentication no

# Kerberos options

#KerberosAuthentication no

#KerberosOrLocalPasswd yes

#KerberosTicketCleanup yes

#KerberosGetAFSToken no

#KerberosUseKuserok yes

# GSSAPI options

#GSSAPIAuthentication no

GSSAPIAuthentication yes

#GSSAPICleanupCredentials yes

GSSAPICleanupCredentials no

#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 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'.

# WARNING: 'UsePAM no' is not supported in Fedora and may cause several

# problems.

#UsePAM no

UsePAM yes

#AllowAgentForwarding yes

#AllowTcpForwarding yes

#GatewayPorts no

#X11Forwarding no

X11Forwarding yes

#X11DisplayOffset 10

#X11UseLocalhost yes

#PrintMotd yes

#PrintLastLog yes

#TCPKeepAlive yes

#UseLogin no

UsePrivilegeSeparation sandbox          # Default for new installations.

#PermitUserEnvironment no

#Compression delayed

#ClientAliveInterval 0

#ClientAliveCountMax 3

#ShowPatchLevel no

#UseDNS yes

#PidFile /var/run/sshd.pid

#MaxStartups 10:30:100

#PermitTunnel no

#ChrootDirectory none

#VersionAddendum none

# no default banner path

#Banner none

# Accept locale-related environment variables

AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES

AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT

AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE

AcceptEnv XMODIFIERS

# override default of no subsystems

Subsystem       sftp    /usr/libexec/openssh/sftp-server

# Uncomment this if you want to use .local domain

#Host *.local

#       CheckHostIP no

# Example of overriding settings on a per-user basis

#Match User anoncvs

#       X11Forwarding no

#       AllowTcpForwarding no

#       ForceCommand cvs server


然后,保存退出。再使用命令

#service sshd start打开服务。

在使用以下命令让SSHD开机启动。

# chkconfig sshd --level 35 on

Note: Forwarding request to 'systemctl enable sshd.service'.

以后Linux服务器开机后,就可以用PUTY,SecureCRT等直接连通了。


SSH默认不在采用原来一些加密算法,从而造成一些以前的client无法连接,解决方法如下:


修改ssh的配置文件 /etc/ssh/sshd_config

在配置文件中添加:​

Ciphers aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr,3des-cbc,arcfour128,arcfour256,arcfour,blowfish-cbc,cast128-cbc

MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-sha1-96,hmac-md5-96

KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,curve25519-sha256@libssh.org


重启sshd服务后,即可正常连接。


通过HTTP代理访问SSH服务:http://www.linuxdiyf.com/linux/15595.html

在Ubuntu 12.04安装和设置SSH服务:http://www.linuxdiyf.com/linux/14551.html

mosh:一个基于SSH用于连接远程Unix/Linux系统的工具:http://www.linuxdiyf.com/linux/14333.html

如何通过反向SSH隧道访问NAT后面的Linux服务器:http://www.linuxdiyf.com/linux/13187.html

如何在Linux上用一次性密码确保SSH登录安全?:http://www.linuxdiyf.com/linux/10991.html