第一步 准备升级包
- openssh相关包
openssh-7.3p1.tar.gzopenssl-1.0.2j.tar.gzzlib-1.2.8.tar.gz- telnet相关包
telnet-0.17-47.el6_3.1.x86_64.rpmtelnet-server-0.17-47.el6_3.1.x86_64.rpmxinetd-2.3.14-39.el6_4.x86_64.rpm
远程操作选择telnet;
第二步 安装工具包
- telnet安装
[[email protected] telnet]# rpm -ivh xinetd-2.3.14-39.el6_4.x86_64.rpm
warning: xinetd-2.3.14-39.el6_4.x86_64.rpm: Header V3 RSA/SHA256 Signature, key I
D fd431d51: NOKEYPreparing... ########################################### [100%]
1:xinetd ########################################### [100%]
[[email protected] telnet]# rpm -ivh telnet-0.17-47.el6_3.1.x86_64.rpm
warning: telnet-0.17-47.el6_3.1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key I
D fd431d51: NOKEYPreparing... ########################################### [100%]
1:telnet ########################################### [100%]
[[email protected] telnet]# rpm -ivh telnet-server-0.17-47.el6_3.1.x86_64.rpm
warning: telnet-server-0.17-47.el6_3.1.x86_64.rpm: Header V3 RSA/SHA256 Signature
, key ID fd431d51: NOKEYPreparing... ########################################### [100%]
1:telnet-server ########################################### [100%]##设置telnet远程登录[[email protected] telnet]# vi /etc/xinetd.d/telnet# default: on# description: The telnet server serves telnet sessions; it uses \# unencrypted username/password pairs for authentication.service telnet
{ flags = REUSE socket_type = stream wait = no user = root server = /usr/sbin/in.telnetd log_on_failure += USERID disable = no}
[[email protected] telnet]# service xinetd restart##添加telnet远程登录用户，(远程root不登录)[[email protected] telnet]# useradd test
[[email protected] telnet]# passwd test
第三步 编译安装
- 删除已安装包
[[email protected] ssh]# rpm -qa|grep openssh openssh-askpass-5.3p1-84.1.el6.x86_64 openssh-clients-5.3p1-84.1.el6.x86_64 openssh-5.3p1-84.1.el6.x86_64 openssh-server-5.3p1-84.1.el6.x86_64 [[email protected] ssh]# rpm -e openssh-askpass-5.3p1-84.1.el6.x86_64 [[email protected] ssh]# rpm -e openssh-clients-5.3p1-84.1.el6.x86_64 --nodeps [[email protected] ssh]# rpm -e openssh-5.3p1-84.1.el6.x86_64 --nodeps [[email protected] ssh]# rpm -e openssh-server-5.3p1-84.1.el6.x86_64
- 编译安装
[[email protected] ssh]# tar -zxvf zlib-1.2.8.tar.gz [[email protected] ssh]# cd zlib-1.2.8 [[email protected] zlib-1.2.8]# ./configure [[email protected] zlib-1.2.8]# make && make install [[email protected] zlib-1.2.8]# cd .. [[email protected] ssh]# tar -zxvf openssl-1.0.2j.tar.gz [[email protected] ssh]# cd openssl-1.0.2j [[email protected] openssl-1.0.2j]# ./config --prefix=/usr/ --shared [[email protected] openssl-1.0.2j]# make [[email protected] openssl-1.0.2j]# make test [[email protected] openssl-1.0.2j]# make install [[email protected] openssl-1.0.2j]# cd .. [[email protected] ssh]# tar -zxvf openssh-7.3p1.tar.gz [[email protected] ssh]# cd openssh-7.3p1 [[email protected] openssh-7.3p1]# mv /etc/ssh /etc/ssh_bak [[email protected] openssh-7.3p1]# ./configure --prefix=/usr --sysconfdir=/etc/ssh --with-zlib --with-md5-passwords [[email protected] openssh-7.3p1]# make [[email protected] openssh-7.3p1]# make install [[email protected] openssh-7.3p1]# cd contrib/redhat#复制启动脚本[[email protected] redhat]# cp sshd.init /etc/init.d/sshd [[email protected] redhat]# cd /etc/init.d/ [[email protected] redhat]# chmod +x /etc/init.d/sshd [[email protected] init.d]# chkconfig sshd [[email protected] init.d]# chkconfig --add sshd [[email protected] redhat]# cd ..#生成登录密钥[[email protected] openssh-7.3p1]# pwd /mywork/soft/ssh/openssh-7.3p1 [[email protected] openssh-7.3p1]# ./ssh-keygen [[email protected] openssh-7.3p1]# cd /root/.ssh/ [[email protected] .ssh]# ls id_rsa id_rsa.pub [[email protected] .ssh]# cat id_rsa.pub >> authorized_keys [[email protected] .ssh]# service sshd restart Stopping sshd: [ OK ] Starting sshd: [ OK ] [[email protected] ~]# ssh -V OpenSSH_7.3p1, OpenSSL 1.0.2j 26 Sep 2016
第四步 所遇问题
- 安装完毕后root用户无法ssh登录
由于新版本的ssh禁用了root用户登录，需将允许登录开启[[email protected] ssh]# pwd /etc/ssh#设置允许root用户远程登录[[email protected] ssh]# cat /etc/ssh/sshd_config # Authentication:...#LoginGraceTime 2mPermitRootLogin yes
- 启动报错
报错效果如下：[[email protected] ~]# service sshd restart Stopping sshd: [ OK ] /sbin/restorecon: lstat(/etc/ssh/ssh_host_key.pub) failed: No such file or dire ctoryStarting sshd: [ OK ] [确定]只要touch该文件即可规避
[[email protected] ~]# touch /etc/ssh/ssh_host_ecdsa_key.pub再重启一下ssh服务，就没有那个报错了
[[email protected] .ssh]# service sshd restart Stopping sshd: [ OK ] Starting sshd: [ OK ]
- SecureCRT不能上传文件的解决办法
#将 /etc/ssh/sshd_config 中的Subsystem sftp /usr/libexec/openssh/sftp-server #改为Subsystem sftp internal-sftp#重启sshd后，sftp正常工作了
- 使用其他工具无法远程连接操作系统
解决方法： =================================================================参考网上解决方法如下： 修改sshd的配置文件 /etc/ssh/sshd_config 在配置文件中添加： Ciphers aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr,3des-cbc,arcfour128,arcfour256,arcfour,blowfish-cbc,cast128-cbc MACs hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,hmac-sha1-96,hmac-md5-96 KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,[email protected] 导致此问题的原因是ssh升级后，为了安全，默认不再采用原来一些加密算法，我们手工添加进去即可。 （添加三行或者添加最后一行，重启服务都报错如下） 但重启服务报错如下： [[email protected] ~]# service sshd restart Stopping sshd:[ OK ] Starting sshd:Unsupported KEX algorithm "ecdh-sha2-nistp521" /etc/ssh/sshd_config line 137: Bad SSH2 KexAlgorithms ‘diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,[email protected]‘. [FAILED] [[email protected] ~]# ================================================================= 修改为如下： Ciphers aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr,3des-cbc,arcfour128,arcfour256,arcfour,blowfish-cbc,cast128-cbc MACs hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,hmac-sha1-96,hmac-md5-96 KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,diffie-hellman-group1-sha1,[email protected] （此行中去掉ecdh-sha2-nistp521）
- 重启后登录不上SSH
升级完ssh以后，服务器在重启之后用ssh登录不上，只有telnet上去重新启动一下ssh才行。
解决办法 ：vi /etc/selinux/config---SELINUX=disabled关闭SELINUX即可；
时间： 2024-11-10 17:10:26