ssh超时断开的解决方法Linux认证考试

文章作者 100test 发表时间 2009:12:19 11:05:42
来源 100Test.Com百考试题网


  当用SSH Secure Shell连接Linux时,如果几分钟没有任何操作,连接就会断开,必须重新登陆才行,每次都重复相同的操作,很是烦人,本文总结了两种解决的方法。

  方法1:更改ssh服务器的配置文件/etc/ssh/sshd_config

  ClientAliveInterval指定了服务器端向客户端请求消息的时间间隔, 默认是0,不发送。而ClientAliveInterval 60表示每分钟发送一次,然后客户端响应,这样就保持长连接了。这里比较怪的地方是:不是客户端主动发起保持连接的请求(如FTerm, CTerm等),而是需要服务器先主动。

  另外,至于ClientAliveCountMax,使用默认值3即可。ClientAliveCountMax表示服务器发出请求后客户端没有响应的次数达到一定值,就自动断开,正常情况下,客户端不会不响应。

  ClientAliveCountMax

  Sets the number of client alive messages (see below) which may be sent without sshd(8) receiving any messages back from the client. If this threshold is reached while client alive messages are being sent, sshd will disconnect the client, terminating the ses-sion. It is important to note that the use of client alive messages is very different from TCPKeepAlive (below). The client alive messages are sent through the encrypted channel and therefore will not be spoofable. The TCP keepalive option enabled by TCPKeepAlive is spoofable. The client alive mechanism is valuable when the client or server depend on knowing when a connection has become inactive.The default value is 3. If ClientAliveInterval (see below) is set to 15, and ClientAliveCountMax is left at the default, unresponsive SSH clients will be disconnected after approximately 45 seconds. This option applies to protocol version 2 only.

  ClientAliveInterval

  Sets a timeout interval in seconds after which if no data has been received from the client, sshd(8) will send a message through the encrypted channel to request a response from the client. The default is 0, indicating that these messages will not be sent to the client. This option applies to protocol version 2 only.

  vim /etc/ssh/sshd_config

  找到ClientAliveInterval 参数,如果没有就自己加一行。

  ClientAliveInterval 参数的数值是秒,比如你设置为540,就是9分钟.

  ClientAliveInterval 540

  对于ClientAliveCountMax

  指如果发现客户端没有相应,则判断一次超时,这个参数设置允许超时的次数,比如10。

  ClientAliveInterval 540

  ClientAliveCountMax 10.

  则代表允许超时 5400秒 = 90分钟。

  方法2:配置客户端

  1 linux下的ssh命令

  vim /etc/ssh/ssh_config

  然后找到里面的ServerAliveInterval 参数,如果没有你同样自己加一个就好了。参数意义相同,都是秒数,比如9分钟:

  ServerAliveInterval 540

  2 SecureCRT

  设置反空闲

  3 Putty

  启用putty keepalive

  putty ->. Connection ->. Seconds between keepalives ( 0 to turn off ),默认为0,改为60。



相关文章


主备ld之间的状态同步Linux认证考试
linux查看端口流量的脚本Linux认证考试
使用stty修改终端设置Linux认证考试
在Fedora下安装PPStream网络电视Linux认证考试
ssh超时断开的解决方法Linux认证考试
LinuxKVM上创建ooRexx构建环境Linux认证考试
Linux安全防护十大招数Linux认证考试
Linux终端命令用法精选Linux认证考试
Ubuntu9.04下CUDA环境的搭建Linux认证考试
澳大利亚华人论坛
考好网
日本华人论坛
华人移民留学论坛
英国华人论坛