旅游网站模板库,西安旅游攻略ppt,淘宝客自建手机网站,网站开发技术教学Unit9.openssh-server1.openssh-server功能#xff1a;让远程主机可以通过网络访问sshd服务#xff0c;开始一个安全shell2.客户端连接方式ssh远程主机用户远程主机ip[rootdesktop0 ~]# ssh root172.25.0.11The authenticity of host 172.25.0.11 (172.25.0.11) cant be esta… Unit9.openssh-server1.openssh-server 功能让远程主机可以通过网络访问sshd服务开始一个安全shell 2.客户端连接方式ssh远程主机用户远程主机ip[rootdesktop0 ~]# ssh root172.25.0.11The authenticity of host 172.25.0.11 (172.25.0.11) cant be established.ECDSA key fingerprint is eb:24:0e:07:96:26:b1:04:c2:37:0c:78:2d:bc:b0:08.Are you sure you want to continue connecting (yes/no)? yes ##连接陌生主机时需要建立认证关系Warning: Permanently added 172.25.0.11 (ECDSA) to the list of known hosts.root172.25.0.11s password: ##远程用户密码Last login: Mon Oct 3 03:13:47 2016[rootserver0 ~] ###登陆成功 ssh 远程主机用户远程主机ip -X ##调用远程主机图形工具ssh 远程主机用户远程主机ipcommand ##直接在远程主机运行某条命令·设置虚拟机·连接远程主机·在远程主机上建立文件 3.sshkey加密1.生成公钥私钥[rootserver0 ~]# ssh-keygen ##生成公钥私钥工具Generating public/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa):[enter] ##加密字符保存文件建议用默认Created directory /root/.ssh.Enter passphrase (empty for no passphrase): [enter] ##密钥密码必须4个字符Enter same passphrase again: [enter] ##确认密码Your identification has been saved in /root/.ssh/id_rsa.Your public key has been saved in /root/.ssh/id_rsa.pub.The key fingerprint is:ab:3c:73:2e:c8:0b:75:c8:39:3a:46:a2:22:34:84:81 rootserver0.example.comThe keys randomart p_w_picpath is:--[ RSA 2048]----|o ||E. ||.. ||. . o ||.o. * . S ||oo.o o . || . . . ||o. oo... || ..o*. |-----------------[rootserver0 ~]# ls /root/.ssh/id_rsa id_rsa.pubid_rsa ##私钥就是钥匙id_rsa.pub ##公钥就是锁 2.添加key认证方式[rootserver0 ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub root172.25.0.11ssh-copy-id ##添加key认证方式的工具-i ##指定加密key文件/root/.ssh/id_rsa.pub ##加密keyroot ##加密用户为root172.25.0.11 ##被加密主机ip 3.分发钥匙给client主机[rootserver0 ~]# scp /root/.ssh/id_rsa root172.25.0.10:/root/.ssh/4.测试[rootdesktop0 ~]# ssh root172.25.0.11 ##通过id_rsa直接连接不需要输入用户密码Last login: Mon Oct 3 03:58:10 2016 from 172.25.0.250[rootserver0 ~]# 4.提升openssh的安全级别1.openssh-server配置文件/etc/ssh/sshd_config78 PasswordAuthentication yes|no ##是否开启用户密码认证yes为支持no为关闭48 PermitRootLogin yes|no ##是否允许超级用户登陆49 AllowUsers student westos ##用户白名单只有在名单中出现的用户可以使用sshd建立shell50 DenyUsers westos ##用户黑名单 转载于:https://blog.51cto.com/12774035/1914976
