CentOS7 升级 openssh 到 openssh-8.0p1版本

centos7.3和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

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[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 ~]#

　　

centos7.3升级后的效果

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[root@linux-node3 ~]# openssl version OpenSSL 1.0.2r  26 Feb 2019 [root@linux-node3 ~]# ssh -V OpenSSH_8.0p1, OpenSSL 1.0.2r  26 Feb 2019 [root@linux-node3 ~]# cat /etc/redhat-release CentOS Linux release 7.3.1611 (Core) [root@linux-node3 ~]#

　　

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

默认centos7.3的ssh是如下版本

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[root@linux-node3 ~]# cat /etc/redhat-release CentOS Linux release 7.3.1611 (Core) [root@linux-node3 ~]# ssh -V OpenSSH_6.6.1p1, OpenSSL 1.0.1e-fips 11 Feb 2013 [root@linux-node3 ~]#

　　

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）

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[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

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[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 [root@linux-node3 ~]#

　　

 

配置telnet

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现在很多centos7版本安装telnet-server以及xinetd之后没有一个叫telnet的配置文件了。

如果下面telnet文件不存在的话，可以跳过这部分的更改

1 2	[root@linux-node3 ~]# ll /etc/xinetd.d/telnet ls: cannot access /etc/xinetd.d/telnet: No such file or directory

　　

如果下面文件存在，请更改配置telnet可以root登录，把disable = yes改成disable = no

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[root@rhel yum.repos.d]# cat /etc/xinetd.d/telnet # default: on # description: The telnet server serves telnet sessions; it uses \ #   unencrypted username/password pairs for authentication. service telnet {     disable = no     flags       = REUSE     socket_type = stream            wait        = no     user        = root     server      = /usr/sbin/in.telnetd     log_on_failure  += USERID }   [root@rhel yum.repos.d]# vim /etc/xinetd.d/telnet [root@rhel yum.repos.d]# cat /etc/xinetd.d/telnet # default: on # description: The telnet server serves telnet sessions; it uses \ #   unencrypted username/password pairs for authentication. service telnet {     disable = yes     flags       = REUSE     socket_type = stream            wait        = no     user        = root     server      = /usr/sbin/in.telnetd     log_on_failure  += USERID }

　　

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

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

 

配置之后的显示

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[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

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[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

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 升级需要几个组件，有些是和编译相关的等

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[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）

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[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 Package pam_snapper-0.2.8-4.el7.x86_64 already installed and latest version Package pam_ssh_agent_auth-0.10.3-2.16.el7.x86_64 already installed and latest version Package pam_2fa-1.0-1.el7.x86_64 already installed and latest version Package pam_mapi-0.3.4-1.el7.x86_64 already installed and latest version Package pam_ssh_user_auth-1.0-1.el7.x86_64 already installed and latest version Package pam_mount-2.16-5.el7.x86_64 already installed and latest version Package pam_radius-1.4.0-3.el7.x86_64 already installed and latest version Package pamtester-0.1.2-4.el7.x86_64 already installed and latest version Package pam_afs_session-2.6-5.el7.x86_64 already installed and latest version Package pam_pkcs11-0.6.2-30.el7.x86_64 already installed and latest version Package pam-1.1.8-22.el7.x86_64 already installed and latest version Package pam_ssh-2.3-1.el7.x86_64 already installed and latest version Package 1:pam_url-0.3.3-4.el7.x86_64 already installed and latest version Package pam_wrapper-1.0.7-2.el7.x86_64 already installed and latest version Package pam-kwallet-5.5.2-1.el7.x86_64 already installed and latest version Package pam-devel-1.1.8-22.el7.x86_64 already installed and latest version Package pam_krb5-2.4.8-6.el7.x86_64 already installed and latest version Package zlib-devel-1.2.7-18.el7.x86_64 already installed and latest version Package zlib-static-1.2.7-18.el7.x86_64 already installed and latest version Package zlib-1.2.7-18.el7.x86_64 already installed and latest version Package zlib-ada-1.4-0.5.20120830CVS.el7.x86_64 already installed and latest version Package zlib-ada-devel-1.4-0.5.20120830CVS.el7.x86_64 already installed and latest version Nothing to do [root@linux-node3 ~]#

　　

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

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[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）

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[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

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[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）

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[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

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

　　

 查看确认版本。没问题

1 2	[root@testssh ~]# openssl version OpenSSL 1.0.2r  26 Feb 2019

　　

 

 安装openssh 

---

 

上传openssh的tar包并解压

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[root@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

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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

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[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)

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[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

 

1 2	[root@linux-node3 ~]# mv  /usr/lib/systemd/system/sshd.service  /data1 [root@linux-node3 ~]# mv  /usr/lib/systemd/system/sshd.socket  /data2

　　

设置sshd服务开机启动

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[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

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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

 

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[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

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[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

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[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

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