[转帖]centos7 升级openssh到openssh-8.0p1版本

centos7 升级openssh到openssh-8.0p1版本

环境介绍

https://www.cnblogs.com/nmap/p/10779658.html

找时间升级一下自己的服务器. 

 

---

 

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

[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

[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

[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）

[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
[root@linux-node3 ~] #

　　

 

配置telnet

---

 

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

[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 = no改成disable = yes

[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

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
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

---

 

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

[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

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

[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

 

[root@linux-node3 ~] # 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