vi /etc/firewalld/zones/public.xml #添加防火墙端口 <port protocol="tcp" port="23"/> yum -y install telnet-server systemctl start telnet.socket #root登录telnet mv /etc/securetty{,.bak} #测试telnet是否成功telnet ip yum install gcc gcc-c++ tar -xzvf openssl-1.1.1l.tar.gz tar -xzvf openssh-8.3p1.tar.gz #升级openssl cd openssl-1.1.1l/ yum install gcc gcc-c++ ./config --prefix=/usr/ --openssldir=/usr/ shared rpm -e openssh --nodeps && rpm -e openssh-clients --nodeps && rpm -e openssh-server --nodeps make && make install mv /etc/ssh /etc/ssh_bak yum install -y pam* zlib* openssl version cd .. #升级openssh cd openssh-8.3p1/ ./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 vi /etc/ssh/sshd_config #添加到最后使root密码登录ssh Protocol 2 SyslogFacility AUTHPRIV PermitRootLogin yes PasswordAuthentication yes ChallengeResponseAuthentication no X11Forwarding yes #解开注释Port 22 service sshd restart #测试是否成功 rpm -e telnet-server

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