RHEL6_CentOS6_Openssh8.0p1升級

建立軟體存放目錄：

--建立軟體存放目錄，並上傳OS映象、Openssh相關安裝包到soft目錄

[root@sshupdate ~]# 

mkdir -p /soft    

ll /soft/

mount OS系統映象

mount -o loop /soft/rhel-server-6.9-x86_64-dvd.iso /mnt/

df -h

結果如下：

/soft/rhel-server-6.9-x86_64-dvd.iso

                      3.7G  3.7G     0 100% /mnt

配置本地YUM源

[root@sshupdate ~]# 

mkdir -p /etc/yum.repos.d/yumbak

mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/yumbak/

ll /etc/yum.repos.d/

[root@sshupdate ~]# 

[root@sshupdate ~]# vi /etc/yum.conf 

[rheldvd]

name=rheldvd

baseurl=file:///mnt

enabled=1

gpgcheck=0

[main]

[root@sshupdate ~]# yum list

Loaded plugins: product-id, refresh-packagekit, search-disabled-repos,

              : subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

Installed Packages

ConsoleKit.x86_64                      0.4.1-6.el6                       @anaconda-RedHatEnterpriseLinux-201703082046.x86_64/6.9

ConsoleKit-libs.x86_64                 0.4.1-6.el6                       @anaconda-RedHatEnterpriseLinux-201703082046.x86_64/6.9

[root@sshupdate ~]# ssh -V

OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013

[root@sshupdate ~]# 

關閉防火牆

[root@sshupdate ]# 

service iptables stop

chkconfig iptables off

chkconfig iptables --list

結果如下：

iptables        0:off   1:off   2:off   3:off   4:off   5:off   6:off

安裝及配置telnet

[root@sshupdate ]# yum install telnet* -y

[root@sshupdate ]# vi /etc/xinetd.d/telnet 

# default: on

# description: The telnet server serves telnet sessions; it uses \

#       unencrypted username/password pairs for authentication.

service telnet

        disable         = yes   --將yes修改為：no

}

[root@sshupdate ]# mv /etc/securetty /etc/securetty.old

[root@sshupdate ]# 

service xinetd start

service xinetd restart

chkconfig xinetd on

chkconfig xinetd --list

結果如下：

xinetd          0:off   1:off   2:on    3:on    4:on    5:on    6:off

[root@sshupdate ]# 

測試telnet

[root@sshupdate zlib-1.2.11]# telnet 192.168.147.129  或 telnet 192.168.147.129 22

Trying 192.168.147.129...

Connected to 192.168.147.129.

Escape character is '^]'.

Red Hat Enterprise Linux Server release 6.9 (Santiago)

Kernel 2.6.32-696.el6.x86_64 on an x86_64

sshupdate login: root  ----輸入使用者名稱

Password:    ----輸入密碼

Last login: Thu Jun 20 04:25:56 from 192.168.147.1

[root@sshupdate ~]# 

[root@sshupdate ~]# exit   --可以退出telnet操作也可以不退出

安裝openssh所需要元件

[root@sshupdate ]# yum install gcc pam-devel zlib-devel -y

解壓zlib庫檔案

[root@sshupdate ~]# 

cd /soft/openssh-update-8.0p1/

tar -xvzf zlib-1.2.11.tar.gz 

cd zlib-1.2.11

配置檢查-編譯-安裝zlib

[root@sshupdate zlib-1.2.11]# 

./configure --prefix=/usr&&make&&make install

[root@sshupdate zlib-1.2.11]# 

echo '/usr/lib' >> /etc/ld.so.conf

ldconfig 

Cat /usr/lib

[root@sshupdate zlib-1.2.11]# ll /usr/lib/libz.so.1

lrwxrwxrwx. 1 root root 14 Jun 20 04:37 /usr/lib/libz.so.1 -> libz.so.1.2.11

[root@sshupdate zlib-1.2.11]# ll /usr/lib/libz.so

lrwxrwxrwx. 1 root root 14 Jun 20 04:37 /usr/lib/libz.so -> libz.so.1.2.11

檢視已安裝zlib庫

[root@sshupdate ]# rpm -qa|grep zlib

zlib-devel-1.2.3-29.el6.x86_64

zlib-1.2.3-29.el6.x86_64

刪除舊zlib庫

[root@sshupdate ]# rpm -e --nodeps zlib

[root@sshupdate ]# 

[root@sshupdate ]# rpm -qa|grep zlib

rpm: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory

[root@sshupdate ]# 

升級openssl

[root@sshupdate zlib-1.2.11]# find / -name openssl

/etc/pki/ca-trust/extracted/openssl

/usr/lib64/openssl

/usr/bin/openssl

[root@sshupdate zlib-1.2.11]# 

[root@sshupdate zlib-1.2.11]# 

mv /usr/lib64/openssl /usr/lib64/openssl.old

mv /usr/bin/openssl /usr/bin/openssl.old

mv /etc/pki/ca-trust/extracted/openssl /etc/pki/ca-trust/extracted/openssl.old

[root@sshupdate zlib-1.2.11]# 

cp /usr/lib64/libcrypto.so.10 /usr/lib64/libcrypto.so.10.old

cp /usr/lib64/libssl.so.10 /usr/lib64/libssl.so.10.old

[root@sshupdate zlib-1.2.11]# rpm -qa|grep openssl|xargs

openssl-1.0.1e-57.el6.x86_64

[root@sshupdate ~]# 

rpm -qa|grep openssl|xargs -i rpm -e --nodeps {}

rpm -qa|grep openssl |xargs

[root@sshupdate ~]# 

cd /soft/openssh-update-8.0p1/

tar -xvzf openssl-1.0.2s.tar.gz

cd openssl-1.0.2s

./config --prefix=/usr/ --openssldir=/etc/ssl --shared zlib

make

make test

make install

檢視升級後Openssl版本

[root@sshupdate openssl-1.0.2s]# openssl version

OpenSSL 1.0.2s  28 May 2019

[root@sshupdate openssl-1.0.2s]#

恢復庫檔案

[root@sshupdate openssl-1.0.2s]#

mv /usr/lib64/libcrypto.so.10.old /usr/lib64/libcrypto.so.10

mv /usr/lib64/libssl.so.10.old /usr/lib64/libssl.so.10

mv /etc/ssh /etc/ssh.old

升級Openssh

rpm -qa|grep openssh

rpm -qa|grep openssh|xargs -i rpm -e --nodeps {}

rpm -qa|grep openssh

install -v -m700 -d /var/lib/sshd

chown -v root:sys /var/lib/sshd/

groupadd -g 50 sshd

useradd -c 'sshd PrivSep' -d /var/lib/sshd -g sshd -s /bin/false -u 50 sshd 

[root@sshupdate ]#

cd /soft/openssh-update-8.0p1/

tar -xvzf openssh-8.0p1.tar.gz 

cd /soft/openssh-update-8.0p1/openssh-8.0p1

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-pam--with-zlib --with-openssl-includes=/usr --with-privsep-path=/var/lib/sshd    ---注：是一行命令；

make

make install

結果如下：

/bin/mkdir -p /etc/ssh

ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519 

/usr/sbin/sshd -t -f /etc/ssh/sshd_config

[root@sshupdate openssh-8.0p1]# 

[root@sshupdate openssh-8.0p1]#

install -v -m755 contrib/ssh-copy-id /usr/bin/

install -v -m644 contrib/ssh-copy-id.1 /usr/share/man/man1

install -v -m755 -d /usr/share/doc/openssh-8.0p1

install -v -m744 INSTALL LICENCE OVERVIEW README* /usr/share/doc/openssh-8.0p1/

[root@sshupdate openssh-8.0p1]# ssh -V

OpenSSH_8.0p1, OpenSSL 1.0.2s  28 May 2019

[root@sshupdate openssh-8.0p1]# 

[root@sshupdate openssh-8.0p1]# 

echo "X11Forwarding yes" >> /etc/ssh/sshd_config 

echo "PermitRootLogin yes" >> /etc/ssh/sshd_config 

cat /etc/ssh/sshd_config 

結果如下：

……………………省略…………………………

X11Forwarding yes

PermitRootLogin yes

[root@sshupdate openssh-8.0p1]# 

 

[root@sshupdate openssh-8.0p1]# 

cp -p contrib/redhat/sshd.init /etc/init.d/sshd

chmod +x /etc/init.d/sshd 

ll /etc/init.d/sshd 

chkconfig --add sshd

chkconfig sshd on

chkconfig sshd --list

結果如下：

sshd            0:off   1:off   2:on    3:on    4:on    5:on    6:off

[root@sshupdate openssh-8.0p1]# 

[root@sshupdate openssh-8.0p1]# vi /etc/selinux/config    

SELINUX=enforcing   ----修改enforcing為：disabled     --務必修改否則ssh無法正常登入

[root@sshupdate openssh-8.0p1]# reboot

[root@sshupdate ]#

[root@sshupdate ~]# vi /etc/xinetd.d/telnet 

# default: on

# description: The telnet server serves telnet sessions; it uses \

#       unencrypted username/password pairs for authentication.

service telnet

       disable         = no   --將no修改為：yes

}

[root@sshupdate ~]# 

[root@sshupdate ~]# mv /etc/securetty.old /etc/securetty

 

[root@sshupdate ~]#

service xinetd stop

chkconfig xinetd off

chkconfig xinetd --list

結果如下：

xinetd          0:off   1:off   2:off   3:off   4:off   5:off   6:off

[root@sshupdate ~]# 

方法二：

mount -o loop /soft/rhel-server-6.9-x86_64-dvd.iso /mnt/

yum remove telnet* -y

[root@sshupdate ~]# 

[root@sshupdate ~]# ssh -V

OpenSSH_8.0p1, OpenSSL 1.0.2s  28 May 2019

[root@sshupdate ~]# 

[root@sshupdate ~]# 

[root@sshupdate ~]# reboot    --重啟正常登入即可

[root@sshupdate ~]#