升级openssh

•  自行配置系统网络yum源。

RedHat_6.5                OpenSSH_5.3p1
RedHat_6.8                OpenSSH_5.3p1
RedHat_6.9                OpenSSH_5.3
RedHat_7.4                OpenSSH_7.4p1
RedHat_7.5                OpenSSH_7.4p1
CentOS_7.4.1708                                OpenSSH_7.4p1
Ubuntu_16.04.1                   OpenSSH_7.2p2 

[root@centos7 ~]# cat /etc/motd

Welcome to **** Financial Cloud Elastic Compute Service !

This ECS instance is based on image CentOS_7.4_baseline_20190702

sed -i ‘$a\172.190.10.204 mirrors.htsec.com‘ /etc/hosts

yum update -y openssh openssl 
yum install -y gcc gcc-c++ glibc make autoconf  openssl-devel pcre-devel  pam-devel

mv /etc/ssh /etc/ssh.old
#或者直接删除
rm -rf /etc/ssh/*

 

rpm -qa | grep openssh |xargs -n1  rpm -e --nodeps

#卸载前后查询rpm包。
[root@localhost src]# rpm -qa | grep openssh
openssh-clients-6.4p1-8.el7.x86_64
openssh-server-6.4p1-8.el7.x86_64
openssh-6.4p1-8.el7.x86_64

 

cd /home/openssh-*p1/
./configure --prefix=/usr  --sysconfdir=/etc/ssh  --with-md5-passwords  --with-pam  --with-zlib --with-ssh1

make && make install

cd /home/openssh-*p1/
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
systemctl enable sshd #此命令只适用于centos7以上操作系统。 

mv  /usr/lib/systemd/system/sshd.service  /home
rm -rf /usr/lib/systemd/system/sshd.service

[root@linux-node3 ~]# chkconfig sshd on
Note: Forwarding request to ‘systemctl enable sshd.socket‘.
Created symlink from /etc/systemd/system/sockets.target.wants/sshd.socket to /usr/lib/systemd/system/sshd.socket.

centos 7版本以上

systemctl stop firewalld      #关闭防火墙。
setenforce 0                  #临时关闭SELinux，不需重启。
sed -i ‘s/^SELINUX=enforcing/SELINUX=disabled/g‘ /etc/selinux/config  #永久关闭selinux，需重启生效。

centos 6版本以下

service iptables status
service iptables stop
setenforce 0                  #临时关闭SELinux，不需重启。
sed -i ‘s/^SELINUX=enforcing/SELINUX=disabled/g‘ /etc/selinux/config  #永久关闭selinux，需重启生效。

 

sed -i ‘s/^#PermitRootLogin prohibit-password/PermitRootLogin yes/g‘ /etc/ssh/sshd_config

sed -i ‘s/^#UseDNS no/UseDNS no/g‘ /etc/ssh/sshd_config

sed -i ‘s/^#PasswordAuthentication yes/PasswordAuthentication yes/g‘ /etc/ssh/sshd_config

service sshd restart #重新启动服务

 

[root@linux-node3 ~]# /etc/init.d/sshd restart
Restarting sshd (via systemctl):                          [  OK  ]
[root@linux-node3 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        State      PID/Program name 
tcp        0      0 0.0.0.0:22              0.0.0.0:*              LISTEN      31800/sshd       
tcp6      0      0 :::22                  :::*                    LISTEN      31800/sshd       
tcp6      0      0 :::23                  :::*                    LISTEN      1/systemd         

[root@linux-node3 ~]# /etc/init.d/sshd stop
Stopping sshd (via systemctl):                            [  OK  ]
[root@linux-node3 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        State      PID/Program name 
tcp6      0      0 :::23                  :::*                    LISTEN      1/systemd         
[root@linux-node3 ~]# /etc/init.d/sshd start
Starting sshd (via systemctl):                            [  OK  ]

使用systemd方式启停也可以。此命令只适用于centos7以上操作系统

[root@linux-node3 ~]# systemctl stop sshd
[root@linux-node3 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        State      PID/Program name 
tcp6      0      0 :::23                  :::*                    LISTEN      1/systemd         
[root@linux-node3 ~]# systemctl start sshd
[root@linux-node3 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        State      PID/Program name 
tcp        0      0 0.0.0.0:22              0.0.0.0:*              LISTEN      31958/sshd       
tcp6      0      0 :::22                  :::*                    LISTEN      31958/sshd       
tcp6      0      0 :::23                  :::*                    LISTEN      1/systemd         
[root@linux-node3 ~]# systemctl restart sshd
[root@linux-node3 ~]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        State      PID/Program name 
tcp        0      0 0.0.0.0:22              0.0.0.0:*              LISTEN      31999/sshd       
tcp6      0      0 :::22                  :::*                    LISTEN      31999/sshd       
tcp6      0      0 :::23                  :::*                    LISTEN      1/systemd        

 

15.验证是否升级成功 

[root@linux-node3 ~]# 
ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2k-fips  26 Jan 2017

升级openssh

原文：https://www.cnblogs.com/shanghai1918/p/13051126.html