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在调试一个网络程序时遇到问题，服务启动了，客户端却连接不上；首先就想到了用telnet连接看看；
命令和Windows下一样，telnet IP 端口号
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# telnet 192.168.0.107 1111
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Trying 192.168.0.107...
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telnet: connect to address 192.168.0.107: Connection timed out
连接超时了，估计是Windows防火墙的问题，我的服务是跑在Windows上的；
控制面板》系统安全》Windows防火墙》高级设置》新建入站规则；
再执行telnet命令看看，
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Trying 192.168.1.107...
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Connected to 192.168.1.107.
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Escape character is '^]'.
连接成功，果然是防火墙的问题！
诶[éi],怎么回事! 退不出去了！Ctrl + c，Ctrl + z，ESC，q，quit，exit，都不行；
注意telnet连接成功后输出的信息：
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Escape character is '^]'.
Ctrl + ]
姿势终于对了；
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telnet> ?
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Commands may be abbreviated. Commands are:
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close close current connection
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logout forcibly logout remote user and close the connection
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display display operating parameters
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mode try to enter line or character mode ('mode ?' for more)
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open connect to a site
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quit exit telnet
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send transmit special characters ('send ?' for more)
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set set operating parameters ('set ?' for more)
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unset unset operating parameters ('unset ?' for more)
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status print status information
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toggle toggle operating parameters ('toggle ?' for more)
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slc change state of special charaters ('slc ?' for more)
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z suspend telnet
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! invoke a subshell
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environ change environment variables ('environ ?' for more)
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? print help information
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telnet> close
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Connection closed.
输入问号然后回车，可以查看帮助；
输入close或quit然后回车，可以退出telnet；
(责任编辑：IT) |
