linux配置telnet

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在看linux网络编程，看到超级服务器部分Inetd，结果想跑个程序试试，发现telnet localhost居然不行，然后果断上网找资料，试了多处方法，才终于行的通。如下：

1、$sudo apt-get install xinetd telnetd

2、$sudo vim /etc/inetd.conf并加入以下一行：

telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd

3、$sudo vim /etc/xinetd.conf并加入以下内容：

# Simple configuration file for xinetd

# Some defaults, and include /etc/xinetd.d/

defaults

{

# Please note that you need a log_type line to be able to use log_on_success

# and log_on_failure. The default is the following :

# log_type = SYSLOG daemon info

instances = 60

log_type = SYSLOG authpriv

log_on_success = HOST PID

log_on_failure = HOST

cps = 25 30

}

includedir /etc/xinetd.d

4、$sudo vim /etc/xinetd.d/telnet并加入以下内容：

# default: on

# description: The telnet server serves telnet sessions;it uses

# unencrypted username/password pairs for authentication.

service telnet

{

disable = no

flags = REUSE

socket_type = stream

wait = no

user = root

server = /usr/sbin/in.telnetd

log_on_failure += USERID

}

5、重启机器或重启网络服务$sudo /etc/init.d/xinetd restart

6、测试配置是否成功(能通过telent服务器登陆到Ubuntu则成功)
正常来说，可能到这就行了，可是我的却还是不行，显示Unable to connect。。。于是乎，继续～～
首先安装openbsd-inetd: sudo apt-get install openbsd-inetd
然后检查文件/etc/inetd.conf，确保有这一行
telnet stream tcp nowait root /usr/sbin/tcpd /usr/sbin/in.telnetd
然后启动：sudo /etc/init.d/openbsd-inetd restart
OK，现在可以了～

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