海运的博客

Centos服务器安全配置SSH使用Google Authenticator二次验证

发布时间:August 30, 2012 // 分类:网络安全 // 2 Comments

CentOS安装所需组件:

yum -y install mercurial pam-devel

安装Google Authenticator:

#http://www.haiyun.me
wget --no-check-certificate https://google-authenticator.googlecode.com/files/libpam-google-authenticator-1.0-source.tar.bz2
tar jxvf libpam-google-authenticator-1.0-source.tar.bz2 
cd libpam-google-authenticator-1.0
make
make install

SSH登录时调用google-authenticator模块,编辑:

/etc/pam.d/sshd

第一行添加:

auth       required     pam_google_authenticator.so

修改SSH配置文件:

vim /etc/ssh/sshd_config

添加或修改以下内容:

ChallengeResponseAuthentication yes
UsePAM yes

重启SSH:

/etc/init.d/sshd restart

生成google-authenticator配置,运行:

google-authenticator 
Do you want authentication tokens to be time-based (y/n) y
https://www.google.com/chart?chs=200x200&chld=M|0&cht=qr&chl=otpauth://totp/root@node1.www.haiyun.me%3Fsecret%3DABEXG5K6CVB56BXY
#此网址为生成的二维码,客户端扫描
Your new secret key is: www.haiyun.me
Your verification code is 582849
Your emergency scratch codes are:
  30776626
  14200155
  80795568
  23936997
  21919909
#上面几行数字为应急码
Do you want me to update your "/root/.google_authenticator" file (y/n) y
#更新配置文件
Do you want to disallow multiple uses of the same authentication
token? This restricts you to one login about every 30s, but it increases
your chances to notice or even prevent man-in-the-middle attacks (y/n) y
#禁止一个口令多用
By default, tokens are good for 30 seconds and in order to compensate for
possible time-skew between the client and the server, we allow an extra
token before and after the current time. If you experience problems with poor
time synchronization, you can increase the window from its default
size of 1:30min to about 4min. Do you want to do so (y/n) n
#客户端与服务器时间误差
If the computer that you are logging into isn't hardened against brute-force
login attempts, you can enable rate-limiting for the authentication module.
By default, this limits attackers to no more than 3 login attempts every 30s.
Do you want to enable rate-limiting (y/n) y
#次数限制

Android安装google-authenticator客户端,扫描添加上方网址的二维码,以后在登录服务器时输入账号密码的同时还需输入google-authenticator即时生成的验证码才能登录。

ssh www.haiyun.me
Verification code: 
Password: 

标签:centos, ssh, 网络安全, ssh安全设置, 服务器安装, 使用Google Authenticator为ssh验证, Google Authenticator, ssh二次验证

有 2 条 关于" Centos服务器安全配置SSH使用Google Authenticator二次验证 "的评论

  1. 独自等待 独自等待

    google在国内老被封,这样不会有影响?

    1. 海运 海运

      客户端即时生成验证码无需连接google服务器。

发表评论

分类
最新文章
最近回复
  • track: NAT 部分没处理,这块感觉有问题。
  • yu: 查到有用的资料很幸福!
  • boscotsang: 请问下服务器端如何控制权限让通过权限认证的客户端才能连接?现在这样只要有自编译的客户端程序都可...
  • yck932: 大侠,请问哪里有 tunnels 详细参考资料,谢谢
  • bubble: 现在linux 4.9以上的内核有个bbr的参数,用这个bbr比用锐速效果更好,可参考我的博文...
  • wang: openwrt 只有 tmp/etc/miniupnpd.conf 修改后又重置了,其他路径找...
  • wbq: 可以了 只是https透明代理如何做呢?
  • wbq: 你的这个配置需要浏览器设置代理ip+port, 现在假设不设置,只配置客户端网关为Nginx那...
  • wbq: 您好,想用Nginx做个透明代理,客户端机器配置下网关(即Nginx那台机器),客户端dns配...
  • ccc: 可以提供易调用openssl常用函数吗?