1、先查看当前openssl和openssh版本

[root@VMServer ~]# cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)

[root@VMServer ~]# openssl version
OpenSSL 1.0.2k-fips  26 Jan 2017

[root@VMServer ~]# ssh -V
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017

[root@VMServer ~]# rpm -qa | grep openss
openssl098e-0.9.8e-29.el7.centos.3.x86_64
openssh-7.4p1-21.el7.x86_64
openssl-1.0.2k-19.el7.x86_64
openssh-server-7.4p1-21.el7.x86_64
openssh-clients-7.4p1-21.el7.x86_64
openssl-libs-1.0.2k-19.el7.x86_64
xmlsec1-openssl-1.2.20-7.el7_4.x86_64

2、先升级openssl

mv openssl-1.1.1g.tar.gz /opt
cd /opt
#解压openssl-1.1.1g源码包
tar -zxvf openssl-1.1.1g.tar.gz
cd openssl-1.1.1g/
#编译前环境配置
./config --prefix=/usr/local/openssl
./config -t
#make编译
make
#make install编译安装
make install
#检查函数库
ldd /usr/local/openssl/bin/openssl
#添加所缺函数库
echo "/usr/local/openssl/lib" >>/etc/ld.so.conf
#更新函数库
ldconfig -v
#将旧版本openssl移除
mv /usr/bin/openssl /usr/bin/openssl_old_bak
#将新版本openssl软链接到/usr/bin/目录下
ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl
#检查版本
which openssl
openssl version -a
#升级openssl后查看版本信息

3、再升级openssh

#拷贝openssh-8.2p1.tar.gz的源码包到/opt目录下
cp /root/openssh-8.2p1.tar.gz /opt
cd /opt
#若可以访问外网，可以直接yum install zlib-devel pam-devel
#yum -y install zlib-devel
#yum -y install pam-devel
#若不可以访问外网，提前下载好zlib-devel和pam-devel所需的rpm包，本地rpm -ivh --force 的方式安装
rpm -ivh --force zlib*.rpm
rpm -ivh --force pam*.rpm

#解压openssh-8.2p1.tar.gz源码包
tar -zxvf openssh-8.2p1.tar.gz
cd openssh-8.2p1/
#备份旧版本
mv /etc/ssh /etc/ssh_bak
sleep 1
#编译前环境配置
./configure --prefix=/usr/local/openssh --sysconfdir=/etc/ssh --with-pam --with-ssl-dir=/usr/local/openssl --with-md5-passwords --mandir=/usr/share/man --with-zlib=/usr/local/zlib --without-hardening
#make编译
make
#make install编译安装
make install

#修改/etc/ssh/sshd_config配置，允许root用户SSH登录，因为openssh-8.2p1配置中无此选项
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
#备份旧版本sshd
mv /usr/sbin/sshd /usr/sbin/sshd_bak
mv /etc/sysconfig/sshd /opt
mv  /usr/lib/systemd/system/sshd.service  /opt

#拷贝新版本sshd到/usr/sbin/
cp -arf /usr/local/openssh/sbin/sshd /usr/sbin/sshd
#卸载原有openssh
for i in $(rpm -qa |grep openssh);do rpm -e $i --nodeps ;done

#卸载后openssh配置文件会变成rpmsave后缀，还原到原来目录下
mv /etc/ssh/sshd_config.rpmsave /etc/ssh/sshd_config
mv /etc/ssh/ssh_config.rpmsave /etc/ssh/ssh_config
mv /etc/ssh/moduli.rpmsave /etc/ssh/moduli
#替换新版本openssh相关命令
cp -arf /usr/local/openssh/bin/* /usr/bin/
cp -arf /usr/local/openssh/sbin/sshd /usr/sbin/sshd

#拷贝启动脚本
cp /opt/openssh-8.2p1/contrib/redhat/sshd.init /etc/init.d/sshd
#给启动脚本添加执行权限
chmod +x /etc/init.d/sshd
#拷贝sshd.pam
cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam

#重启sshd服务并设为开机自启动
systemctl daemon-reload
service sshd restart
chkconfig --add sshd
chkconfig --level 2345 sshd on
chkconfig --list