Debian Linux操作系统下启动Telnet服务

http://linux.ccidnet.com/art/9513/20070706/1136933_1.html

Root@2[/]# apt-get install xinetd

root@2[/]# apt-get install telnetd

root@2[/]# apt-get install telnet

新建一个文件/etc/xinetd.d/telnet,内容如下，并保存

root@2[/]# nano -w /etc/xinetd.d/telnet
# 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

        server_args     = -h

        log_on_failure  += USERID



}

从上面我们可以看到我们已经连接成功了，但是使用root连接的时候会失败，因为默认的安全设置是限制root用户使用telnet连接主机的

本来因为telnet是明文传输的，所以处于安全考虑才限制了root从telnet登陆，如果你需要使用，那么如下修改

root@2[/]# nano /etc/pam.d/login

#

# The PAM configuration file for the Shadow `login' service

#

# NOTE: If you use a session module (such as kerberos or NIS+)

# that retains persistent credentials (like key caches, etc), you

# need to enable the `CLOSE_SESSIONS' option in /etc/login.defs

# in order for login to stay around until after logout to call

# pam_close_session() and cleanup.

#

# Outputs an issue file prior to each login prompt (Replaces the

# ISSUE_FILE option from login.defs). Uncomment for use

# auth required pam_issue.so issue=/etc/issue

# Disallows root logins except on tty's listed in /etc/securetty

# (Replaces the `CONSOLE' setting from login.defs)

#把下面在行注释掉

# auth requisite pam_securetty.so

# Disallows other than root logins when /etc/nologin exists

# (Replaces the `NOLOGINS_FILE' option from login.defs)

auth requisite pam_nologin.so

# This module parses /etc/environment (the standard for setting

# environ vars) and also allows you to use an extended config

# file /etc/security/pam_env.conf.

# (Replaces the `ENVIRON_FILE' setting from login.defs)

auth required pam_env.so

# Standard Un*x authentication. The "nullok" line allows passwordless

# accounts.

@include common-auth

# This allows certain extra groups to be granted to a user

# based on things like time of day, tty, service, and user.

# Please uncomment and edit /etc/security/group.conf if you

# wish to use this.

# (Replaces the `CONSOLE_GROUPS' option in login.defs)

# auth optional pam_group.so

# Uncomment and edit /etc/security/time.conf if you n

好，现在一个telnet我们就在debian下面架设好了，当然最后一步本人不建议你做

因为telnet是内镶在xinetd这个服务里面的，所以如果你要启动或者是要停止该服务就要

root@2[/]# /etc/init.d/xinetd

force-reload reload restart start stop