linux下升级openssh

linux下升级openssh

 

查询是否安装telnet 

#  rpm -qa | grep telnet 

telnet-server-0.17-31.EL4.5 

telnet-0.17-31.EL4.5 

 

打开telnet服务 

修改设置文件/etc/xinetd.d/telnet中disable字段改为no。 

启动服务#ntsysv或#service xinetd restart。 

创建登陆用户 

因为不能直接root telnet登陆,所以创建一个登陆用户.安转完成后可以把该用户删除 

useradd opensshinstall 

(删除用户及/home/sshinstall目录  userdel -r sshinstall   删除这个用户的组groupdel sshinstall) 

 

安装源文件在/usr/local/src目录下 

zlib和openssl安装在/usr/local目录下 

 

安装zlib-1.2.5 

#tar -zxvf zlib-1.2.5.tar.gz 

#cd zlib-1.2.5 

#./configure --prefix=/usr/local/zlib-1.2.5 -share 

#make 

#make test 

#make install 

cp libz.a /usr/local/zlib-1.2.5/lib 

cp libz.so.1.2.5 /usr/local/zlib-1.2.5/lib 

cd /usr/local/zlib-1.2.5/lib; chmod u=rw,go=r libz.a 

cp zlib.3 /usr/local/zlib-1.2.5/share/man/man3 

chmod 644 /usr/local/zlib-1.2.5/share/man/man3/zlib.3 

cp zlib.pc /usr/local/zlib-1.2.5/lib/pkgconfig 

chmod 644 /usr/local/zlib-1.2.5/lib/pkgconfig/zlib.pc 

cp zlib.h zconf.h /usr/local/zlib-1.2.5/include 

chmod 644 /usr/local/zlib-1.2.5/include/zlib.h /usr/local/zlib-1.2.5/include/zconf.h 

#vi /etc/ld.so.conf    配置库文件搜索路径 

include ld.so.conf.d/*.conf 

##add 2010.7.7 

/usr/local/zlib-1.2.5/lib 

##add end 

#ldconfig -v       刷新缓存文件/etc/ld.so.cache 

#ln -s /usr/local/zlib-1.2.5 /usr/local/zlib 

 

 

安装openssl 

#cd /usr/local/src 

#tar zxvf openssl-1.0.0a.tar.gz 

#cd openssl-1.0.0a 

#./config shared zlib-dynamic --prefix=/usr/local/openssl-1.0.0a --with-zlib-lib=/usr/local/zlib-1.2.5/lib --with-zlib-include=/usr/local/zlib-1.2.5/include 

#make 

#make test （这一步是进行 SSL 加密协议的完整测试，如果出现错误就要一定先找出原因，否则一味继续可能导致 SSH 不能使用！） 

#make install 

#vi /etc/ld.so.conf      配置库文件搜索路径 

############################################ 

## add below line to ld.so.conf 

/usr/local/openssl-1.0.0a/lib                    64位OS 没有生成lib目录，是lib64目录 

############################################ 

#ldconfig -v       刷新缓存文件/etc/ld.so.cache 

#ln -s /usr/local/openssl-1.0.0a /usr/local/openssl 

vi /etc/profile 

########################################### 

(add to end of the file) 

PATH=/usr/local/openssl/bin:$PATH 

export PATH 

########################################### 

 

退出，再登录，查看openssl的版本号，以验正是否安装正确 

#openssl version -a 

OpenSSL 1.0.0a 1 Jun 2010 

built on: Wed Jul  7 17:08:07 CST 2010 

platform. linux-x86_64 

options:  bn(64,64) rc4(1x,char) des(idx,cisc,16,int) idea(int) blowfish(idx) 

compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB_SHARED -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -m64 -DL_ENDIAN -DTERMIO -O3 -Wall -DMD32_REG_T=int -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DWHIRLPOOL_ASM 

OPENSSLDIR: "/usr/local/openssl-1.0.0a/ssl" 

 

 

 

停止并卸载Openssh 

1.停止OpenSSH服务 

#service sshd stop 

2. 查询并卸载openssh 

# rpm -qa | grep openssh 

openssh-3.9p1-8.RHEL4.24 

openssh-askpass-3.9p1-8.RHEL4.24 

openssh-clients-3.9p1-8.RHEL4.24 

openssh-server-3.9p1-8.RHEL4.24 

openssh-askpass-gnome-3.9p1-8.RHEL4.24 

#rpm -e openssh-3.9p1-8.RHEL4.24 --nodeps 

#rpm -e openssh-clients-3.9p1-8.RHEL4.24 --nodeps 

警告/etc/ssh/ssh_config 已存为 /etc/ssh/ssh_config.rpmsave 

#rpm -e openssh-askpass-3.9p1-8.RHEL4.24 

#rpm -e openssh-server-3.9p1-8.RHEL4.24  --nodeps 

#rpm -e openssh-askpass-gnome-3.9p1-8.RHEL4.24 

cd /usr/local/src 

tar zxvf openssh-5.5p1.tar.gz 

cd  openssh-5.5p1 

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-pam --with-ssl-dir=/usr/local/openssl-1.0.0a --with-md5-passwords --mandir=/usr/share/man --with-zlib=/usr/local/zlib-1.2.5 

#make 

#make install 

# 

将sshd加入启动服务: 

进入ssh安装解压目录 

#cp ./contrib/redhat/sshd.init /etc/init.d/sshd 

#chmod +x /etc/init.d/sshd 

#chkconfig --add sshd 

最后，启动 SSH 服务使修改生效： 

# service sshd start 

重启后确认一下当前的 OpenSSH 和 OpenSSL 是否正确： 

# ssh -v 

如果看到了新的版本号就没问题啦！ 

关闭telnet服务 

修改设置文件/etc/xinetd.d/telnet中disable字段改为yes。 

启动服务#ntsysv或#service xinetd restart。 

注意问题 

1.在安装openssh, ./configure 时，报下面错误： 

configure: error: PAM headers not found 

运行# rpm -qa | grep pam 

   pam_smb-1.1.7-5 

   pam_ccreds-1-3 

   pam_passwdqc-0.7.5-2 

   pam-0.77-66.17 

   pam_krb5-2.1.8-1 

   spamassassin-3.0.6-1.el4 

发现有 pam-0.77-66.17，从网上找到 pam-devel-0.77-66.17.i386.rpm， 

运行rpm -ivh pam-devel-0.77-66.17.i386.rpm后，./configure正常 

版本号0.77-66.17必须一样。 

2.在安装openssh时,configure报错: 

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-pam --with-zlib --with-ssl-dir=/usr/include/openssl --with-md5-passwords --mandir=/usr/share/man 

..... 

configure: error: *** zlib too old - check config.log *** 

Your reported zlib version has known security problems.  It's possible your 

vendor has fixed these problems without changing the version number.  If you 

are sure this is the case, you can disable the check by running 

"./configure --without-zlib-version-check". 

If you are in doubt, upgrade zlib to version 1.2.3 or greater. 

See http://www.gzip.org/zlib/ for details. 

因此需要升级zlib. 

3.如果操作系统是64位的，openssl-1.0.0a只生成了lib64，没有生成lib目录。openssh configure时，还是连接的老版本的openssl,郁闷。 

4. ./configure显示信息： 

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-pam --with-ssl-dir=/usr/local/openssl-1.0.0a --with-md5-passwords --mandir=/usr/share/man --with-zlib=/usr/local/zlib-1.2.5 

显示信息： 

OpenSSH has been configured with the following options: 

                     User binaries: /usr/bin 

                   System binaries: /usr/sbin 

               Configuration files: /etc/ssh 

                   Askpass program: /usr/libexec/ssh-askpass 

                      Manual pages: /usr/share/man/manX 

                          PID file: /var/run 

  Privilege separation chroot path: /var/empty 

            sshd default user PATH: /usr/bin:/bin:/usr/sbin:/sbin 

                    Manpage format: doc 

                       PAM support: yes 

                   OSF SIA support: no 

                 KerberosV support: no 

                   SELinux support: no 

                 Smartcard support: 

                     S/KEY support: no 

              TCP Wrappers support: no 

              MD5 password support: yes 

                   libedit support: no 

  Solaris process contract support: no 

       IP address in $DISPLAY hack: no 

           Translate v4 in v6 hack: yes 

                  BSD Auth support: no 

              Random number source: OpenSSL internal ONLY 

              Host: i686-pc-linux-gnu 

          Compiler: gcc 

    Compiler flags: -g -O2 -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -fno-builtin-memset -std=gnu99 

Preprocessor flags: -I/usr/local/openssl-1.0.0a/include -I/usr/local/zlib-1.2.5/include 

      Linker flags: -L/usr/local/openssl-1.0.0a/lib -L/usr/local/zlib-1.2.5/lib 

         Libraries: -lresolv -lcrypto -ldl -lutil -lz -lnsl  -lcrypt 

         +for sshd:  -lpam 

PAM is enabled. You may need to install a PAM control file 

for sshd, otherwise password authentication may fail. 

Example PAM control files can be found in the contrib/ 

subdirectory