安全加固需求，由於某盟掃描系統主機有SSL系列漏洞，客戶要求必須修復；
解決方案：將SSH/SSL升級到最新版本，刪除SSL舊版本（實測不刪除舊版本某盟掃描無法通過）。
當前版本：OpenSSH_5.3p1, OpenSSL 1.0.1e-fips
當前最新版本：OpenSSH_7.3p1, OpenSSL 1.0.2h
查看SSH/SSL當前版本：
ssh -V
openssl version
[root@test0823 ~]# ssh -V
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
[root@test0823 ssh]# openssl version
OpenSSL 1.0.1e-fips 11 Feb 2013備份ssh配置文件：
tar zcvf /etc/ssh.tar.gz /etc/ssh/
[root@test0823 ~]# tar zcvf /etc/ssh.tar.gz /etc/ssh/
ssh/
ssh/ssh_host_dsa_key.pub
ssh/ssh_host_rsa_key.pub
ssh/ssh_host_rsa_key
ssh/sshd_config
ssh/ssh_config
ssh/moduli
ssh/ssh_host_dsa_key
ssh/ssh_host_key.pub
ssh/ssh_host_key 目前最新版本：
OpenSSH_7.3p1, OpenSSL 1.0.2h
本次安裝介質到Linux公社資源站下載：
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免費下載地址在 http://linux.linuxidc.com/
用戶名與密碼都是www.linuxidc.com
具體下載目錄在 /2016年資料/9月/22日/SSH-SSL源碼編譯安裝簡易操作說明/
下載方法見 http://www.linuxidc.com/Linux/2013-07/87684.htm
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SSH/SSL安裝配置參考：
SSL安裝：
參考 http://www.linuxfromscratch.org/blfs/view/svn/postlfs/openssl.html
SSH安裝：
參考 http://www.linuxfromscratch.org/blfs/view/svn/postlfs/openssh.html
本次測試所有源碼包均默認上傳到服務器的/root目錄下。
需要先安裝SSL，再安裝SSH
[root@test0823 ~]# tar -zxvf openssl-1.0.2h.tar.gz
[root@test0823 ~]# cd openssl-1.0.2h復制下面的命令執行：
./config --prefix=/usr \
--openssldir=/etc/ssl \
--libdir=lib \
shared \
zlib-dynamic &&
make depend &&
make操作如下：
[root@test0823 openssl-1.0.2h]# ./config --prefix=/usr \
> --openssldir=/etc/ssl \
> --libdir=lib \
> shared \
> zlib-dynamic &&
> make depend &&
> make復制下面的命令執行：
make MANDIR=/usr/share/man MANSUFFIX=ssl install &&
install -dv -m755 /usr/share/doc/openssl-1.0.2h &&
cp -vfr doc/* /usr/share/doc/openssl-1.0.2h操作如下：
[root@test0823 openssl-1.0.2h]# make MANDIR=/usr/share/man MANSUFFIX=ssl install &&
> install -dv -m755 /usr/share/doc/openssl-1.0.2h &&
> cp -vfr doc/* /usr/share/doc/openssl-1.0.2hopenssl version
操作如下：
[root@test0823 openssl-1.0.2h]# openssl version
OpenSSL 1.0.2h 3 May 2016
[root@test0823 openssl-1.0.2h]# ssh -V
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013[root@test0823 ~]# tar -zxvf openssh-7.3p1.tar.gz
[root@test0823 ~]# cd openssh-7.3p1復制下面的命令執行：
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操作如下：
[root@test0823 openssh-7.3p1]# 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復制下面的命令執行：
./configure --prefix=/usr \
--sysconfdir=/etc/ssh \
--with-md5-passwords \
--with-privsep-path=/var/lib/sshd &&
make操作如下：
[root@test0823 openssh-7.3p1]# ./configure --prefix=/usr \
> --sysconfdir=/etc/ssh \
> --with-md5-passwords \
> --with-privsep-path=/var/lib/sshd &&
> make復制下面的命令執行：
make install &&
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-7.3p1 &&
install -v -m644 INSTALL LICENCE OVERVIEW README* \
/usr/share/doc/openssh-7.3p1操作如下：
[root@test0823 openssh-7.3p1]# make install &&
> 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-7.3p1 &&
> install -v -m644 INSTALL LICENCE OVERVIEW README* \
> /usr/share/doc/openssh-7.3p1[root@test0823 openssh-7.3p1]# ssh -V
OpenSSH_7.3p1, OpenSSL 1.0.2h 3 May 2016將之前的sshd重命名備份，做一個sshd的軟連接：
mv /usr/sbin/sshd /usr/sbin/sshd.OFF
ln -s /root/openssh-7.3p1/sshd /usr/sbin/sshd使用 service sshd restart 重啟一下服務
[root@test0823 openssh-7.3p1]# service sshd restart
Stopping sshd: [ OK ]
Starting sshd: /etc/ssh/sshd_config line 81: Unsupported option GSSAPIAuthentication
/etc/ssh/sshd_config line 83: Unsupported option GSSAPICleanupCredentials
/etc/ssh/sshd_config line 97: Unsupported option UsePAM
[ OK ]上面的報錯並不影響sshd正常啟動，為了不再顯示上述提示，可以注釋掉相關配置行：
vi /etc/ssh/sshd_config
注釋掉 81，83，97 三行。
再次重啟sshd服務就不會有那三行的提示報錯。
允許root用戶ssh登錄（默認可能就是允許，如果不允許，可以在文件末尾追加下面的一行配置到配置文件，或者直接vi編輯修改）
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config之前沒有刪除舊版本的SSL,SSH是因為不了解相關聯的程序，
但是最後掃描發現如果不刪除舊版本的SSL，某盟的掃描依然會掃出SSL的系列漏洞。
查看rpm安裝的openssl相關包：
rpm -qa|grep openssl對舊版本的SSL（這裡是openssl-1.0.1e-42.el6.x86_64）進行刪除：
rpm -e openssl-1.0.1e-42.el6.x86_64
直接嘗試刪除會提示如下庫文件的依賴：
[root@test0823 ~]# rpm -e openssl-1.0.1e-42.el6.x86_64
error: Failed dependencies:
libcrypto.so.10()(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
libcrypto.so.10()(64bit) is needed by (installed) libarchive-2.8.3-4.el6_2.x86_64
libcrypto.so.10()(64bit) is needed by (installed) libssh2-1.4.2-1.el6_6.1.x86_64
libcrypto.so.10()(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
libcrypto.so.10()(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) bind-libs-32:9.8.2-0.37.rc1.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) bind-utils-32:9.8.2-0.37.rc1.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) fipscheck-1.2.0-7.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.CentOS.x86_64
libcrypto.so.10()(64bit) is needed by (installed) cyrus-sasl-md5-2.1.23-15.el6_6.2.x86_64
libcrypto.so.10()(64bit) is needed by (installed) gnome-vfs2-2.24.2-6.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) ptlib-2.6.5-3.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) opal-3.6.6-4.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) python-ldap-0:2.3.10-1.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) net-snmp-libs-1:5.5-54.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) evolution-data-server-2.32.3-23.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) gstreamer-plugins-bad-free-0.10.19-3.el6_5.x86_64
libcrypto.so.10()(64bit) is needed by (installed) xorg-x11-server-Xorg-1.15.0-36.el6.centos.x86_64
libcrypto.so.10()(64bit) is needed by (installed) hplip-libs-3.14.6-3.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) ntpdate-4.2.6p5-5.el6.centos.x86_64
libcrypto.so.10()(64bit) is needed by (installed) ntp-4.2.6p5-5.el6.centos.x86_64
libcrypto.so.10()(64bit) is needed by (installed) certmonger-0.77.5-1.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) cyrus-sasl-2.1.23-15.el6_6.2.x86_64
libcrypto.so.10()(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
libcrypto.so.10()(64bit) is needed by (installed) hpijs-1:3.14.6-3.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) ekiga-3.2.6-4.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) gnome-vfs2-smb-2.24.2-6.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) tcpdump-14:4.0.0-5.20090921gitdf3cb4.2.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
libcrypto.so.10()(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) net-snmp-libs-1:5.5-54.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) ntpdate-4.2.6p5-5.el6.centos.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) ntp-4.2.6p5-5.el6.centos.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1)(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) certmonger-0.77.5-1.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
libcrypto.so.10(OPENSSL_1.0.1_EC)(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) libssh2-1.4.2-1.el6_6.1.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) bind-libs-32:9.8.2-0.37.rc1.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.centos.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) cyrus-sasl-md5-2.1.23-15.el6_6.2.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) net-snmp-libs-1:5.5-54.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) gstreamer-plugins-bad-free-0.10.19-3.el6_5.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) xorg-x11-server-Xorg-1.15.0-36.el6.centos.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) ntpdate-4.2.6p5-5.el6.centos.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) ntp-4.2.6p5-5.el6.centos.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) certmonger-0.77.5-1.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) cyrus-sasl-2.1.23-15.el6_6.2.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) tcpdump-14:4.0.0-5.20090921gitdf3cb4.2.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) openssh-5.3p1-111.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) openssh-server-5.3p1-111.el6.x86_64
libcrypto.so.10(libcrypto.so.10)(64bit) is needed by (installed) openssh-clients-5.3p1-111.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
libssl.so.10()(64bit) is needed by (installed) libssh2-1.4.2-1.el6_6.1.x86_64
libssl.so.10()(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
libssl.so.10()(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
libssl.so.10()(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.centos.x86_64
libssl.so.10()(64bit) is needed by (installed) gnome-vfs2-2.24.2-6.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) ptlib-2.6.5-3.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) opal-3.6.6-4.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) python-ldap-0:2.3.10-1.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) evolution-data-server-2.32.3-23.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) gstreamer-plugins-bad-free-0.10.19-3.el6_5.x86_64
libssl.so.10()(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
libssl.so.10()(64bit) is needed by (installed) ekiga-3.2.6-4.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) gnome-vfs2-smb-2.24.2-6.el6.x86_64
libssl.so.10()(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) qt-1:4.6.2-28.el6_5.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) wget-1.12-5.el6_6.1.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) wpa_supplicant-1:0.7.3-6.el6.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) mysql-libs-5.1.73-5.el6_6.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) httpd-tools-2.2.15-45.el6.centos.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) python-libs-2.6.6-64.el6.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) pyOpenSSL-0.13.1-2.el6.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64
libssl.so.10(libssl.so.10)(64bit) is needed by (installed) vsftpd-2.2.2-14.el6.x86_64
openssl is needed by (installed) postfix-2:2.6.6-6.el6_5.x86_64記錄好依賴的這兩個庫文件
libcrypto.so.10
libssl.so.10然後忽略依賴刪除：
rpm -e --nodeps openssl-1.0.1e-42.el6.x86_64做新的軟連接映射：
[root@test0823 openssl-1.0.2h]# ln -s /root/openssl-1.0.2h/libssl.so.1.0.0 /usr/lib64/libssl.so.10
[root@test0823 openssl-1.0.2h]# ln -s /root/openssl-1.0.2h/libcrypto.so.1.0.0 /usr/lib64/libcrypto.so.10如果是最後刪除的openssl，那麼還需要注意openssl軟連接的情況，如下：
[root@test0823 apps]# ln -s /root/openssl-1.0.2h/apps/openssl /usr/bin/openssl然後再次掃描已經沒有SSL相關漏洞了。
我的專業不是SA，對Linux的編譯安裝了解也不多，所以這個加固過程中不免有所纰漏或錯誤，歡迎內行指出供大家一起參考學習。
另外感謝網友：游蕩 早期提供給我的ssh安裝說明參考。
感謝www.linuxfromscratch.org網站提供的SSH/SSL安裝操作說明。
下面關於SSH相關的文章您也可能喜歡，不妨參考下：
Ubuntu 下配置 SSH服務全過程及問題解決 http://www.linuxidc.com/Linux/2011-09/42775.htm
Ubuntu 14.04 下安裝Samba 及SSH 服務端的方法 http://www.linuxidc.com/Linux/2015-01/111971.htm
SSH服務遠程訪問Linux服務器登陸慢 http://www.linuxidc.com/Linux/2011-08/39742.htm
提高Ubuntu的SSH登陸認證速度的辦法 http://www.linuxidc.com/Linux/2014-09/106810.htm
開啟SSH服務讓Android手機遠程訪問 Ubuntu 14.04 http://www.linuxidc.com/Linux/2014-09/106809.htm
如何為Linux系統中的SSH添加雙重認證 http://www.linuxidc.com/Linux/2014-08/105998.htm
在 Linux 中為非 SSH 用戶配置 SFTP 環境 http://www.linuxidc.com/Linux/2014-08/105865.htm
Linux 上SSH 服務的配置和管理 http://www.linuxidc.com/Linux/2014-06/103627.htm
