文章目錄

• • • • • • 1. 安裝telnet
          • 2. 上傳openssh安裝包
          • 3. 安裝依賴包
          • 4. 卸載現在的openssh
          • 5. 解壓賦予權限
          • 6. 開始安裝

1. 安裝telnet

rpm -qa | grep telnet rpm -qa | grep xinetd yum -y install telnet telnet-server yum -y install xinetd

驗證

rpm -qa | grep telnet rpm -qa | grep xinetd

記錄：

rpm -qa | grep telnettelnet-0.17-64.el7.x86_64telnet-server-0.17-64.el7.x86_64 rpm -qa | grep xinetdxinetd-2.3.15-13.el7.x86_64 rpm -qa | grep xinetd

關閉防火墻

systemctl status firewalld.service systemctl stop firewalld.service systemctl disable firewalld

調整安全策略

setenforce 0 getenforce

記錄：

getenforcedisabled

啟動telnet服務和xinetd服務

systemctl enable xinetd.service systemctl enable telnet.socket systemctl start telnet.socket systemctl start xinetd mv /etc/securetty /etc/securetty.old systemctl restart xinetd.service

2. 上傳openssh安裝包

將安裝包openssh-8.7p1.tar上傳至/tmp，升級完成后，可刪除tar包

3. 安裝依賴包

依賴包必須都安裝，無法安裝的包需聯系廠商要

yum -y install lrzsz* yum install -y gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel pam-devel zlib-devel yum install -y pam* zlib* ssh -V

4. 卸載現在的openssh

查詢是否有rpm，若有執行下一步
卸載現有的openssh版本

rpm -qa | grep openssh rpm -e $(rpm -qa | grep openssh) --nodeps

5. 解壓賦予權限

解壓新的安裝包

cd /tmp tar xf openssh-8.7p1.tar.gz

賦予權限

cd /tmp/openssh-8.7p1 chown -R root.root /tmp/openssh-8.7p1

6. 開始安裝

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-openssl-includes=/usr/local/ssl/include --with-ssl-dir=/usr/local/ssl && make && make install echo $?

配置文件

sed -i.bak '/Subsystem/s/Subsystem/#Subsystem/' /etc/ssh/sshd_config sed -i.bakUseDNS '/#UseDNS/s/#UseDNS/UseDNS/' /etc/ssh/sshd_config sed -i.bak '/^#PermitRootLogin/cPermitRootLogin yes' /etc/ssh/sshd_config cat<<EOF>>/etc/ssh/sshd_config Subsystem sftp /usr/libexec/openssh/sftp-server Ciphers +aes128-cbc,aes192-cbc,aes256-cbc KexAlgorithms +diffie-hellman-group1-sha1 EOF cp -a contrib/redhat/sshd.init /etc/init.d/sshd cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam chmod +x /etc/init.d/sshd chkconfig --add sshd chkconfig sshd on /etc/init.d/sshd start ssh -V systemctl stop xinetd.service systemctl stop telnet.socket systemctl disable xinetd.service systemctl disable telnet.socket mv /etc/securetty.old /etc/securetty

總結

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