Centos8升级OpenSSH服务

1、安装依赖包
yum -y install wget tar gcc make
yum -y install perl-IPC-Cmd
yum install *Pod-Html -y
yum -y install pam-devel
yum install zlib-devel

2、备份ssh配置
mv /etc/ssh /etc/ssh_bak

3、删除现有ssh版本
systemctl stop sshd
rpm -qa | grep openssh
yum remove openssh* -y

4、解压上传openssh压缩包
tar xzvf openssl-3.0.11.tar.gz
tar xzvf openssh-9.5p1.tar.gz
tar xzvf zlib-1.3.tar.gz

5、进入zlib目录进行配置与编译
cd zlib-1.3
./configure --prefix=/usr/local/zlib
make && make install

6、进入openssl目录进行配置与编译
cd openssl-3.0.11
./config --prefix=/usr/ --openssldir=/usr/shared
make && make install
openssl version

7、进入openssh目录进行配置与编译
cd openssh-9.5p1
./configure --with-zlib --with-ssl-dir --with-pam --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc/ssh
make && make install
cp contrib/redhat/sshd.init /etc/init.d/sshd
ssh -V

8、写入配置至/etc/ssh/sshd_config目录中
echo ‘PermitRootLogin yes’ >>/etc/ssh/sshd_config
echo ‘PubkeyAuthentication yes’ >>/etc/ssh/sshd_config
echo ‘PasswordAuthentication yes’ >>/etc/ssh/sshd_config

9、关闭防火墙与selinux
systemctl stop firewalld
setenforce 0

10、启动ssh服务
systemctl restart sshd.service
systemctl enable sshd.service