• centos7 升级openssh到openssh-8.0p1版本


    centos7 升级openssh到openssh-8.0p1版本

    环境介绍


    centos7.6升级完毕测试登录ssh以及重启后登录ssh均无问题。

    前期请自行配置好yum源(如果不会请百度)

    整个过程不需要卸载原先的openssl包和openssh的rpm包。不影响我们的操作

    本文的环境都是系统自带的openssh,没有经历过手动编译安装方式。如果之前有手动编译安装过openssh,请参照本文自行测试是否能成功。

    如果严格参照本文操作,我保证你升级没问题

    centos7.6升级后的效果

    [root@testssh ~]# ssh -V
    OpenSSH_8.0p1, OpenSSL 1.0.2r  26 Feb 2019
    [root@testssh ~]# openssl version
    OpenSSL 1.0.2r  26 Feb 2019
     
    [root@testssh ~]# cat /etc/redhat-release
    CentOS Linux release 7.6.1810 (Core)
    [root@testssh ~]#
    

      

    如果ssh版本过低,最好先yum update openssh升级下到目前yum仓库默认的openssh7.4p1版本

    执行yum update  openssh先升级下(反正官方提供的这种升级是没问题的。如果之前手动编译操作过openssh的升级,变更了默认配置文件路径什么的请自行测试。)

    (这里准备统一openssh版本为7.4p1之后再统一编译安装升级到openssh8.0p1)

    [root@linux-node3 ~]# yum update openssh -y
     
    [root@linux-node3 ~]# ssh -V
    OpenSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017
    [root@linux-node3 ~]#
    

      

    安装telnet-server以及xinetd

    [root@linux-node3 ~]# yum install xinetd telnet-server -y
    Loaded plugins: fastestmirror
    Loading mirror speeds from cached hostfile
     * base: mirrors.163.com
     * epel: mirrors.aliyun.com
     * extras: mirrors.cn99.com
     * updates: mirrors.cn99.com
    Package 2:xinetd-2.3.15-13.el7.x86_64 already installed and latest version
    Package 1:telnet-server-0.17-64.el7.x86_64 already installed and latest version
    Nothing to do
    

      

    配置telnet


    配置telnet登录的终端类型,在/etc/securetty文件末尾增加一些pts终端,如下

    pts/0
    pts/1
    pts/2
    pts/3

    配置之后的显示

    [root@linux-node3 ~]# vim /etc/securetty
    [root@linux-node3 ~]# tail -5 /etc/securetty
    xvc0
    pts/0
    pts/1
    pts/2
    pts/3
    [root@linux-node3 ~]#
    

      

    启动telnet服务,并设置开机自动启动

    [root@linux-node3 ~]# systemctl enable xinetd
      
    [root@linux-node3 ~]# systemctl enable telnet.socket
    Created symlink from /etc/systemd/system/sockets.target.wants/telnet.socket to /usr/lib/systemd/system/telnet.socket.
    [root@linux-node3 ~]#
     
    [root@linux-node3 ~]# systemctl start telnet.socket
    [root@linux-node3 ~]# systemctl start xinetd
    [root@linux-node3 ~]# netstat -lntp|grep 23
    tcp6       0      0 :::23                   :::*                    LISTEN      1/systemd          
    [root@linux-node3 ~]#
    

      

    切换到telnet方式登录,以后的操作都在telnet终端下操作,防止ssh连接意外中断造成升级失败

    telnet方式登录 

     安装依赖包


     升级需要几个组件,有些是和编译相关的等

    [root@linux-node3 ~]# yum install  -y gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel  pam-devel
    Loaded plugins: fastestmirror
    Loading mirror speeds from cached hostfile
     * base: mirrors.163.com
     * epel: mirrors.aliyun.com
     * extras: mirrors.cn99.com
     * updates: mirrors.cn99.com
    Package gcc-4.8.5-36.el7_6.1.x86_64 already installed and latest version
    Package gcc-c++-4.8.5-36.el7_6.1.x86_64 already installed and latest version
    Package glibc-2.17-260.el7_6.4.x86_64 already installed and latest version
    Package 1:make-3.82-23.el7.x86_64 already installed and latest version
    Package autoconf-2.69-11.el7.noarch already installed and latest version
    Package 1:openssl-1.0.2k-16.el7_6.1.x86_64 already installed and latest version
    Package 1:openssl-devel-1.0.2k-16.el7_6.1.x86_64 already installed and latest version
    Package pcre-devel-8.32-17.el7.x86_64 already installed and latest version
    Package pam-devel-1.1.8-22.el7.x86_64 already installed and latest version
    Nothing to do
    [root@linux-node3 ~]#
    

      

     安装pam和zlib等(后面的升级操作可能没用到pam,安装上也没啥影响,如果不想安装pam请自行测试)

    [root@linux-node3 ~]# yum install  -y pam* zlib*
    Loaded plugins: fastestmirror
    Loading mirror speeds from cached hostfile
     * base: mirrors.163.com
     * epel: mirrors.aliyun.com
     * extras: mirrors.cn99.com
     * updates: mirrors.cn99.com
    Package pam_yubico-2.26-1.el7.x86_64 already installed and latest version
    Package pam_script-1.1.8-1.el7.x86_64 already installed and latest version
    Package pam_oath-2.4.1-9.el7.x86_64 already installed and latest version
    

      

    下载openssh包和openssl的包


     我们都下载最新版本,下载箭头指的包

    https://openbsd.hk/pub/OpenBSD/OpenSSH/portable/

    https://ftp.openssl.org/source/

     开始安装openssl


    个人习惯把安装包或者工具之类的放下面目录。根据个人喜好随便放,不影响安装

    [root@linux-node3 ~]# mkdir /data/tools -p
    [root@linux-node3 ~]# cd /data/tools/
    [root@linux-node3 /data/tools]# rz -E
    rz waiting to receive.
    [root@linux-node3 /data/tools]# ll
    total 5224
    -rw-r--r-- 1 root root 5348369 Apr 27 12:19 openssl-1.0.2r.tar.gz
    
    解压文件
    [root@linux-node3 /data/tools]# tar xfz openssl-1.0.2r.tar.gz
    [root@linux-node3 /data/tools]# ll
    total 5228
    drwxr-xr-x 20 root root    4096 Apr 27 12:20 openssl-1.0.2r
    -rw-r--r--  1 root root 5348369 Apr 27 12:19 openssl-1.0.2r.tar.gz
    [root@linux-node3 /data/tools]# cd
    [root@linux-node3 ~]#
     
     
    现在是系统默认的版本,等会升级完毕对比下
    [root@linux-node3 ~]# openssl version
    OpenSSL 1.0.2k-fips  26 Jan 2017
    [root@linux-node3 ~]#

     备份下面2个文件或目录(如果存在的话就执行)

    [root@linux-node3 ~]# ll /usr/bin/openssl
    -rwxr-xr-x 1 root root 555248 Mar 12 18:12 /usr/bin/openssl
    [root@linux-node3 ~]# mv /usr/bin/openssl /usr/bin/openssl_bak
     
    [root@linux-node3 ~]# ll /usr/include/openssl
    total 1864
    -rw-r--r-- 1 root root   6146 Mar 12 18:12 aes.h
    -rw-r--r-- 1 root root  63204 Mar 12 18:12 asn1.h
    -rw-r--r-- 1 root root  24435 Mar 12 18:12 asn1_mac.h
    -rw-r--r-- 1 root root  34475 Mar 12 18:12 asn1t.h
    -rw-r--r-- 1 root root  38742 Mar 12 18:12 bio.h
    -rw-r--r-- 1 root root   5351 Mar 12 18:12 blowfish.h
    ......
     
    [root@linux-node3 ~]# mv /usr/include/openssl /usr/include/openssl_bak
    [root@linux-node3 ~]#
    

      

    编译安装新版本的openssl

    配置、编译、安装3个命令一起执行

    &&符号表示前面的执行成功才会执行后面的

    [root@linux-node3 ~]# cd /data/tools/openssl-1.0.2r/
     
    [root@linux-node3 /data/tools/openssl-1.0.2r]# ./config shared && make && make install

    以上命令执行完毕,echo $?查看下最后的make install是否有报错,0表示没有问题

     下面2个文件或者目录做软链接 (刚才前面的步骤mv备份过原来的)

    [root@linux-node3 ~]# ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
    [root@linux-node3 ~]# ln -s /usr/local/ssl/include/openssl /usr/include/openssl
    [root@linux-node3 ~]# ll /usr/bin/openssl
    lrwxrwxrwx 1 root root 26 Apr 27 12:31 /usr/bin/openssl -> /usr/local/ssl/bin/openssl
    [root@linux-node3 ~]# ll /usr/include/openssl -ld
    lrwxrwxrwx 1 root root 30 Apr 27 12:31 /usr/include/openssl -> /usr/local/ssl/include/openssl
    [root@linux-node3 ~]#
    

      

    命令行执行下面2个命令加载新配置

    echo "/usr/local/ssl/lib" >> /etc/ld.so.conf
     
    /sbin/ldconfig
    

      

     查看确认版本。没问题

    [root@testssh ~]# openssl version
    OpenSSL 1.0.2r  26 Feb 2019
    

      

     安装openssh 


    上传openssh的tar包并解压

    ot@testssh ~]# cd /data/tools/
    [root@testssh tools]# ll
    total 7628
    -rw-r--r--  1 root root 1597697 Apr 18 07:02 openssh-8.0p1.tar.gz
    drwxr-xr-x 20 root root    4096 Apr 23 23:12 openssl-1.0.2r
    -rw-r--r--  1 root root 5348369 Feb 26 22:34 openssl-1.0.2r.tar.gz
    -rwxr-xr-x  1 root root  853040 Apr 11  2018 sshd
    [root@testssh tools]# tar xfz openssh-8.0p1.tar.gz
    [root@testssh tools]# cd openssh-8.0p1
     
     
    可能文件默认显示uid和gid数组都是1000,这里重新授权下。不授权可能也不影响安装(请自行测试)
    [root@testssh tools]# chown -R root.root /data/tools/openssh-8.0p1

     命令行删除原先ssh的配置文件和目录

    然后配置、编译、安装

    注意下面编译安装的命令是一行,请把第一行末尾的 去掉,然后在文本里弄成一行之后放命令行执行

    rm -rf /etc/ssh/*
     
    ./configure --prefix=/usr/ --sysconfdir=/etc/ssh  --with-openssl-includes=/usr/local/ssl/include 
     --with-ssl-dir=/usr/local/ssl   --with-zlib   --with-md5-passwords   --with-pam  && make && make install

     参考下我的截图

     安装完毕 检查下结果

     修改配置文件最终为如下内容,其他的不要动(注意selinux开启状态的话请先执行setenfoce 0)

    [root@linux-node3 ~]# grep "^PermitRootLogin"  /etc/ssh/sshd_config
    PermitRootLogin yes
    [root@linux-node3 ~]# grep  "UseDNS"  /etc/ssh/sshd_config
    UseDNS no
    [root@linux-node3 ~]#
    

      

     从原先的解压的包中拷贝一些文件到目标位置(如果目标目录存在就覆盖)

    (可能下面的ssh.pam文件都没用到,因为sshd_config配置文件貌似没使用它,请自行测试。我这边是拷贝了)

    [root@linux-node3 /data/tools/openssh-8.0p1]# cp -a contrib/redhat/sshd.init /etc/init.d/sshd
    [root@linux-node3 /data/tools/openssh-8.0p1]# cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam
    [root@linux-node3 /data/tools/openssh-8.0p1]# chmod +x /etc/init.d/sshd
     
    [root@linux-node3 /data/tools/openssh-8.0p1]# chkconfig --add sshd
    [root@linux-node3 /data/tools/openssh-8.0p1]# systemctl enable sshd
    [root@linux-node3 /data/tools/openssh-8.0p1]#
    

      

     把原先的systemd管理的sshd文件删除或者移走或者删除,不移走的话影响我们重启sshd服务

     mv  /usr/lib/systemd/system/sshd.service  /data/
    

      

    设置sshd服务开机启动

    [root@linux-node3 ~]# chkconfig sshd on
    Note: Forwarding request to 'systemctl enable sshd.socket'.
    Created symlink from /etc/systemd/system/sockets.target.wants/sshd.socket to /usr/lib/systemd/system/sshd.socket.
    

      

     接下来测试启停服务。都正常

    以后管理sshd通过下面方式了
    [root@linux-node3 ~]# /etc/init.d/sshd restart
    Restarting sshd (via systemctl):                           [  OK  ]
    [root@linux-node3 ~]#
    [root@linux-node3 ~]#
    [root@linux-node3 ~]# netstat -lntp
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
    tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      31800/sshd         
    tcp6       0      0 :::22                   :::*                    LISTEN      31800/sshd         
    tcp6       0      0 :::23                   :::*                    LISTEN      1/systemd          
    [root@linux-node3 ~]# /etc/init.d/sshd stop
    Stopping sshd (via systemctl):                             [  OK  ]
    [root@linux-node3 ~]# netstat -lntp
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
    tcp6       0      0 :::23                   :::*                    LISTEN      1/systemd          
    [root@linux-node3 ~]# /etc/init.d/sshd start
    Starting sshd (via systemctl):                            [  OK  ]
    [root@linux-node3 ~]#
    [root@linux-node3 ~]#
    

      

     使用systemd方式也行

    [root@linux-node3 ~]# systemctl stop sshd
    [root@linux-node3 ~]# netstat -lntp
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
    tcp6       0      0 :::23                   :::*                    LISTEN      1/systemd          
    [root@linux-node3 ~]# systemctl start sshd
    [root@linux-node3 ~]# netstat -lntp
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
    tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      31958/sshd         
    tcp6       0      0 :::22                   :::*                    LISTEN      31958/sshd         
    tcp6       0      0 :::23                   :::*                    LISTEN      1/systemd          
    [root@linux-node3 ~]# systemctl restart sshd
    [root@linux-node3 ~]# netstat -lntp
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
    tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      31999/sshd         
    tcp6       0      0 :::22                   :::*                    LISTEN      31999/sshd         
    tcp6       0      0 :::23                   :::*                    LISTEN      1/systemd          
    [root@linux-node3 ~]#
    

      

     测试版本。都正常

    [root@linux-node3 ~]# ssh -V
    OpenSSH_8.0p1, OpenSSL 1.0.2r  26 Feb 2019
    [root@linux-node3 ~]#
     
    [root@linux-node3 ~]# telnet 127.0.0.1 22
    Trying 127.0.0.1...
    Connected to 127.0.0.1.
    Escape character is '^]'.
    SSH-2.0-OpenSSH_8.0
    

      

     如果不是生产机器。可以试着重启机器测试下登录sshd是否正常。我这边测试都没问题

    测试没问题后可以把telnet服务关闭了

    [root@linux-node3 ~]# systemctl disable xinetd.service
    Removed symlink /etc/systemd/system/multi-user.target.wants/xinetd.service.
    [root@linux-node3 ~]# systemctl stop xinetd.service
    [root@linux-node3 ~]# systemctl disable telnet.socket
    [root@linux-node3 ~]# systemctl stop telnet.socket
    [root@linux-node3 ~]# netstat -lntp
    

     

    转自文档:https://www.cnblogs.com/nmap/p/10779658.html

     
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  • 原文地址:https://www.cnblogs.com/caidingyu/p/11100804.html
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