（轉）
原文鏈接：https://www.cnblogs.com/nmap/p/10779658.html
環境介紹
centos7.3和centos7.6升級完畢測試登錄ssh以及重啟后登錄ssh均無問題。
前期請自行配置好yum源（如果不會請百度）
整個過程不需要卸載原先的openssl包和openssh的rpm包。不影響我們的操作
本文的環境都是系統自帶的openssh，沒有經歷過手動編譯安裝方式。如果之前有手動編譯安裝過openssh，請參照本文自行測試是否能成功。
如果嚴格參照本文操作，我保證你升級沒問題
centos7.6升級后的效果
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[root@testssh ~]
# ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2r 26 Feb 2019
[root@testssh ~]
# openssl version
OpenSSL 1.0.2r 26 Feb 2019
[root@testssh ~]
# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@testssh ~]
#
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centos7.3升級后的效果
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[root@linux-node3 ~]
# openssl version
OpenSSL 1.0.2r 26 Feb 2019
[root@linux-node3 ~]
# ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2r 26 Feb 2019
[root@linux-node3 ~]
# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)
[root@linux-node3 ~]
#
|
如果ssh版本過低，最好先yum update openssh升級下到目前yum倉庫默認的openssh7.4p1版本
默認centos7.3的ssh是如下版本
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[root@linux-node3 ~]
# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)
[root@linux-node3 ~]
# ssh -V
OpenSSH_6.6.1p1, OpenSSL 1.0.1e-fips 11 Feb 2013
[root@linux-node3 ~]
#
|
執行yum update openssh先升級下（反正官方提供的這種升級是沒問題的。如果之前手動編譯操作過openssh的升級，變更了默認配置文件路徑什么的請自行測試。）
（這里准備統一openssh版本為7.4p1之后再統一編譯安裝升級到openssh8.0p1）
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[root@linux-node3 ~]
# yum update openssh -y
[root@linux-node3 ~]
# ssh -V
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017
[root@linux-node3 ~]
#
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安裝telnet-server以及xinetd
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[root@linux-node3 ~]
# yum install xinetd telnet-server -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* epel: mirrors.aliyun.com
* extras: mirrors.cn99.com
* updates: mirrors.cn99.com
Package 2:xinetd-2.3.15-13.el7.x86_64 already installed and latest version
Package 1:telnet-server-0.17-64.el7.x86_64 already installed and latest version
Nothing to
do
[root@linux-node3 ~]
#
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配置telnet
現在很多centos7版本安裝telnet-server以及xinetd之后沒有一個叫telnet的配置文件了。
如果下面telnet文件不存在的話，可以跳過這部分的更改
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[root@linux-node3 ~]
# ll /etc/xinetd.d/telnet
ls
: cannot access
/etc/xinetd
.d
/telnet
: No such
file
or directory
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如果下面文件存在，請更改配置telnet可以root登錄，把disable = no改成disable = yes
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[root@rhel yum.repos.d]
# cat /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
flags = REUSE
socket_type = stream
wait = no
user = root
server =
/usr/sbin/in
.telnetd
log_on_failure += USERID
}
[root@rhel yum.repos.d]
# vim /etc/xinetd.d/telnet
[root@rhel yum.repos.d]
# cat /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
flags = REUSE
socket_type = stream
wait = no
user = root
server =
/usr/sbin/in
.telnetd
log_on_failure += USERID
}
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配置telnet登錄的終端類型，在/etc/securetty文件末尾增加一些pts終端，如下
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pts
/0
pts
/1
pts
/2
pts
/3
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配置之后的顯示
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[root@linux-node3 ~]
# vim /etc/securetty
[root@linux-node3 ~]
# tail -5 /etc/securetty
xvc0
pts
/0
pts
/1
pts
/2
pts
/3
[root@linux-node3 ~]
#
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啟動telnet服務，並設置開機自動啟動
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[root@linux-node3 ~]
# systemctl enable xinetd
[root@linux-node3 ~]
# systemctl enable telnet.socket
Created
symlink
from
/etc/systemd/system/sockets
.target.wants
/telnet
.socket to
/usr/lib/systemd/system/telnet
.socket.
[root@linux-node3 ~]
#
[root@linux-node3 ~]
# systemctl start telnet.socket
[root@linux-node3 ~]
# systemctl start xinetd
[root@linux-node3 ~]
# netstat -lntp|grep 23
tcp6 0 0 :::23 :::* LISTEN 1
/systemd
[root@linux-node3 ~]
#
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切換到telnet方式登錄，以后的操作都在telnet終端下操作，防止ssh連接意外中斷造成升級失敗
telnet方式登錄
安裝依賴包
升級需要幾個組件，有些是和編譯相關的等
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[root@linux-node3 ~]
# yum install -y gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel pam-devel
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* epel: mirrors.aliyun.com
* extras: mirrors.cn99.com
* updates: mirrors.cn99.com
Package
gcc
-4.8.5-36.el7_6.1.x86_64 already installed and latest version
Package
gcc
-c++-4.8.5-36.el7_6.1.x86_64 already installed and latest version
Package glibc-2.17-260.el7_6.4.x86_64 already installed and latest version
Package 1:
make
-3.82-23.el7.x86_64 already installed and latest version
Package autoconf-2.69-11.el7.noarch already installed and latest version
Package 1:openssl-1.0.2k-16.el7_6.1.x86_64 already installed and latest version
Package 1:openssl-devel-1.0.2k-16.el7_6.1.x86_64 already installed and latest version
Package pcre-devel-8.32-17.el7.x86_64 already installed and latest version
Package pam-devel-1.1.8-22.el7.x86_64 already installed and latest version
Nothing to
do
[root@linux-node3 ~]
#
|
安裝pam和zlib等（后面的升級操作可能沒用到pam，安裝上也沒啥影響，如果不想安裝pam請自行測試）
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[root@linux-node3 ~]
# yum install -y pam* zlib*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* epel: mirrors.aliyun.com
* extras: mirrors.cn99.com
* updates: mirrors.cn99.com
Package pam_yubico-2.26-1.el7.x86_64 already installed and latest version
Package pam_script-1.1.8-1.el7.x86_64 already installed and latest version
Package pam_oath-2.4.1-9.el7.x86_64 already installed and latest version
Package pam_snapper-0.2.8-4.el7.x86_64 already installed and latest version
Package pam_ssh_agent_auth-0.10.3-2.16.el7.x86_64 already installed and latest version
Package pam_2fa-1.0-1.el7.x86_64 already installed and latest version
Package pam_mapi-0.3.4-1.el7.x86_64 already installed and latest version
Package pam_ssh_user_auth-1.0-1.el7.x86_64 already installed and latest version
Package pam_mount-2.16-5.el7.x86_64 already installed and latest version
Package pam_radius-1.4.0-3.el7.x86_64 already installed and latest version
Package pamtester-0.1.2-4.el7.x86_64 already installed and latest version
Package pam_afs_session-2.6-5.el7.x86_64 already installed and latest version
Package pam_pkcs11-0.6.2-30.el7.x86_64 already installed and latest version
Package pam-1.1.8-22.el7.x86_64 already installed and latest version
Package pam_ssh-2.3-1.el7.x86_64 already installed and latest version
Package 1:pam_url-0.3.3-4.el7.x86_64 already installed and latest version
Package pam_wrapper-1.0.7-2.el7.x86_64 already installed and latest version
Package pam-kwallet-5.5.2-1.el7.x86_64 already installed and latest version
Package pam-devel-1.1.8-22.el7.x86_64 already installed and latest version
Package pam_krb5-2.4.8-6.el7.x86_64 already installed and latest version
Package zlib-devel-1.2.7-18.el7.x86_64 already installed and latest version
Package zlib-static-1.2.7-18.el7.x86_64 already installed and latest version
Package zlib-1.2.7-18.el7.x86_64 already installed and latest version
Package zlib-ada-1.4-0.5.20120830CVS.el7.x86_64 already installed and latest version
Package zlib-ada-devel-1.4-0.5.20120830CVS.el7.x86_64 already installed and latest version
Nothing to
do
[root@linux-node3 ~]
#
|
下載openssh包和openssl的包
我們都下載最新版本，下載箭頭指的包
https://openbsd.hk/pub/OpenBSD/OpenSSH/portable/
https://ftp.openssl.org/source/
開始安裝openssl
個人習慣把安裝包或者工具之類的放下面目錄。根據個人喜好隨便放，不影響安裝
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[root@linux-node3 ~]
# mkdir /data/tools -p
[root@linux-node3 ~]
# cd /data/tools/
[root@linux-node3
/data/tools
]
# rz -E
rz waiting to receive.
[root@linux-node3
/data/tools
]
# ll
total 5224
-rw-r--r-- 1 root root 5348369 Apr 27 12:19 openssl-1.0.2r.
tar
.gz
解壓文件
[root@linux-node3
/data/tools
]
# tar xfz openssl-1.0.2r.tar.gz
[root@linux-node3
/data/tools
]
# ll
total 5228
drwxr-xr-x 20 root root 4096 Apr 27 12:20 openssl-1.0.2r
-rw-r--r-- 1 root root 5348369 Apr 27 12:19 openssl-1.0.2r.
tar
.gz
[root@linux-node3
/data/tools
]
# cd
[root@linux-node3 ~]
#
現在是系統默認的版本，等會升級完畢對比下
[root@linux-node3 ~]
# openssl version
OpenSSL 1.0.2k-fips 26 Jan 2017
[root@linux-node3 ~]
#
|
備份下面2個文件或目錄（如果存在的話就執行）
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[root@linux-node3 ~]
# ll /usr/bin/openssl
-rwxr-xr-x 1 root root 555248 Mar 12 18:12
/usr/bin/openssl
[root@linux-node3 ~]
# mv /usr/bin/openssl /usr/bin/openssl_bak
[root@linux-node3 ~]
# ll /usr/include/openssl
total 1864
-rw-r--r-- 1 root root 6146 Mar 12 18:12 aes.h
-rw-r--r-- 1 root root 63204 Mar 12 18:12 asn1.h
-rw-r--r-- 1 root root 24435 Mar 12 18:12 asn1_mac.h
-rw-r--r-- 1 root root 34475 Mar 12 18:12 asn1t.h
-rw-r--r-- 1 root root 38742 Mar 12 18:12 bio.h
-rw-r--r-- 1 root root 5351 Mar 12 18:12 blowfish.h
......
[root@linux-node3 ~]
# mv /usr/include/openssl /usr/include/openssl_bak
[root@linux-node3 ~]
#
|
編譯安裝新版本的openssl
配置、編譯、安裝3個命令一起執行
&&符號表示前面的執行成功才會執行后面的
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[root@linux-node3 ~]
# cd /data/tools/openssl-1.0.2r/
[root@linux-node3
/data/tools/openssl-1
.0.2r]
# ./config shared && make && make install
|
以上命令執行完畢，echo $?查看下最后的make install是否有報錯，0表示沒有問題
下面2個文件或者目錄做軟鏈接 （剛才前面的步驟mv備份過原來的）
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[root@linux-node3 ~]
# ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
[root@linux-node3 ~]
# ln -s /usr/local/ssl/include/openssl /usr/include/openssl
[root@linux-node3 ~]
# ll /usr/bin/openssl
lrwxrwxrwx 1 root root 26 Apr 27 12:31
/usr/bin/openssl
->
/usr/local/ssl/bin/openssl
[root@linux-node3 ~]
# ll /usr/include/openssl -ld
lrwxrwxrwx 1 root root 30 Apr 27 12:31
/usr/include/openssl
->
/usr/local/ssl/include/openssl
[root@linux-node3 ~]
#
|
命令行執行下面2個命令加載新配置
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echo
"/usr/local/ssl/lib"
>>
/etc/ld
.so.conf
/sbin/ldconfig
|
查看確認版本。沒問題
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[root@testssh ~]
# openssl version
OpenSSL 1.0.2r 26 Feb 2019
|
安裝openssh
上傳openssh的tar包並解壓
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[root@testssh ~]
# cd /data/tools/
[root@testssh tools]
# ll
total 7628
-rw-r--r-- 1 root root 1597697 Apr 18 07:02 openssh-8.0p1.
tar
.gz
drwxr-xr-x 20 root root 4096 Apr 23 23:12 openssl-1.0.2r
-rw-r--r-- 1 root root 5348369 Feb 26 22:34 openssl-1.0.2r.
tar
.gz
-rwxr-xr-x 1 root root 853040 Apr 11 2018 sshd
[root@testssh tools]
# tar xfz openssh-8.0p1.tar.gz
[root@testssh tools]
# cd openssh-8.0p1
可能文件默認顯示uid和gid數組都是1000，這里重新授權下。不授權可能也不影響安裝（請自行測試）
[root@testssh tools]
# chown -R root.root /data/tools/openssh-8.0p1
|
命令行刪除原先ssh的配置文件和目錄
然后配置、編譯、安裝
注意下面編譯安裝的命令是一行，請把第一行末尾的 \ 去掉，然后在文本里弄成一行之后放命令行執行
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rm
-rf
/etc/ssh/
*
.
/configure
--prefix=
/usr/
--sysconfdir=
/etc/ssh
--with-openssl-includes=
/usr/local/ssl/include
\
--with-ssl-
dir
=
/usr/local/ssl
--with-zlib --with-md5-passwords --with-pam &&
make
&&
make
install
|
參考下我的截圖
安裝完畢 檢查下結果
修改配置文件最終為如下內容，其他的不要動
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[root@linux-node3 ~]
# grep "^PermitRootLogin" /etc/ssh/sshd_config
PermitRootLogin
yes
[root@linux-node3 ~]
# grep "UseDNS" /etc/ssh/sshd_config
UseDNS no
[root@linux-node3 ~]
#
|
從原先的解壓的包中拷貝一些文件到目標位置（如果目標目錄存在就覆蓋）
(可能下面的ssh.pam文件都沒用到，因為sshd_config配置文件貌似沒使用它，請自行測試。我這邊是拷貝了)
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[root@linux-node3
/data/tools/openssh-8
.0p1]
# cp -a contrib/redhat/sshd.init /etc/init.d/sshd
[root@linux-node3
/data/tools/openssh-8
.0p1]
# cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam
[root@linux-node3
/data/tools/openssh-8
.0p1]
# chmod +x /etc/init.d/sshd
[root@linux-node3
/data/tools/openssh-8
.0p1]
# chkconfig --add sshd
[root@linux-node3
/data/tools/openssh-8
.0p1]
# systemctl enable sshd
[root@linux-node3
/data/tools/openssh-8
.0p1]
#
|
把原先的systemd管理的sshd文件刪除或者移走或者刪除，不移走的話影響我們重啟sshd服務
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[root@linux-node3 ~]
# mv /usr/lib/systemd/system/sshd.service /data/
|
設置sshd服務開機啟動
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[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.
|
接下來測試啟停服務。都正常
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以后管理sshd通過下面方式了
[root@linux-node3 ~]
# /etc/init.d/sshd restart
Restarting sshd (via systemctl): [ OK ]
[root@linux-node3 ~]
#
[root@linux-node3 ~]
#
[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 ]
[root@linux-node3 ~]
#
[root@linux-node3 ~]
#
|
使用systemd方式也行
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[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
[root@linux-node3 ~]
#
|
測試版本。都正常
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[root@linux-node3 ~]
# ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2r 26 Feb 2019
[root@linux-node3 ~]
#
[root@linux-node3 ~]
# telnet 127.0.0.1 22
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is
'^]'
.
SSH-2.0-OpenSSH_8.0
|
如果不是生產機器。可以試着重啟機器測試下登錄sshd是否正常。我這邊測試都沒問題
測試沒問題后可以把telnet服務關閉了
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[root@linux-node3 ~]
# systemctl disable xinetd.service
Removed
symlink
/etc/systemd/system/multi-user
.target.wants
/xinetd
.service.
[root@linux-node3 ~]
# systemctl stop xinetd.service
[root@linux-node3 ~]
# systemctl disable telnet.socket
[root@linux-node3 ~]
# systemctl stop telnet.socket
[root@linux-node3 ~]
# netstat -lntp
|
問題：
答：把sshd_config中開啟UsePAM yes就好了。