注意：?openssl版本(openssl版本要大于1.0.1，zlib版本要大于1.1.4)

一、安裝依賴包

yum -y install gcc make perl # zlib zlib-devel yum install -y gcc openssl-devel pam-devel rpm-buildyum install telnet-server telnet xinetd -y

二、安裝telnet服務(wù)非常重要

systemctl enable xinetd.service systemctl enable telnet.socketsystemctl start telnet.socket systemctl start xinetd

三、下載openssh 我是openssh-8.0p1

wget http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-8.0p1.tar.gz　　

四、關(guān)閉防火墻、selinx

#不關(guān)可能會(huì)導(dǎo)致ssh連不上 臨時(shí)關(guān)閉：setenforce 0 永久關(guān)閉：sed -i 's/enforcing/disabled/g' /etc/sysconfig/selinux

五、升級(jí)openssh

mv /etc/ssh /etc/ssh.oldtar xf openssh-8.0p1.tar.gz cd openssh-8.0p1卸載 rpm -qa |grep opensshopenssh-clients-7.4p1-16.el7.x86_64 openssh-7.4p1-16.el7.x86_64 openssh-server-7.4p1-16.el7.x86_64 cp -r /etc/ssh /etc/ssh.oldfor i in $(rpm -qa |grep openssh);do rpm -e $i --nodeps;donecd openssh-8.0p1./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords--with-pam --with-tcp-wrappers --with-ssl-dir=/usr/local/ssl --without-hardeningmake && make installcp contrib/redhat/sshd.init /etc/init.d/sshd chkconfig --add sshd chkconfig sshd on chkconfig --list|grep sshd sed -i "32a PermitRootLogin yes" /etc/ssh/sshd_config systemctl restart sshd 升級(jí)完成查看版本

轉(zhuǎn)載于:https://www.cnblogs.com/zhaojingyu/p/11399033.html

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