Difference between revisions of "Telnet"

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[[Category:Daemons_and_system_services (English)]]
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[[Category:Networking]]
 
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[[de:Telnet]]
=Introduction=
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[[es:Telnet]]
 
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[[zh-CN:Telnet]]
TELNET is the traditional protocol for making remote console connections over TCP.
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[[Wikipedia:Telnet|Telnet]] is the traditional protocol for making remote console connections over TCP. Telnet is '''not secure''' and is mainly used to connect to legacy equipment nowadays. For a secure alternative see [[SSH]].
 
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TELNET is not secured and is mainly used to connect to legacy equipment now days.
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Follow these instructions to configure an Arch Linux machine as a telnet server.
 
Follow these instructions to configure an Arch Linux machine as a telnet server.
  
=Installation=
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== Installation ==
 
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To only use telnet to connect to other machines, install netkit-telnet:
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<pre>
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# pacman -S netkit-telnet
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</pre>
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To also configure a telnet server, install xinetd as well:
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<pre>
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# pacman -S xinetd netkit-telnet
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</pre>
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*Important, "Telnetd is evil legacy code and is not trustworthy - do not run it unless you absolutely need it." a quote from the netkit-telnet readme.
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To use telnet only to connect to other machines, [[pacman|install]] {{Pkg|inetutils}}.
  
A better option when needing a telnet server, is to install telnet-bsd from AUR instead of netkit-telnet (which also has support for IPv6).
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To configure a telnet server, install {{Pkg|xinetd}} as well.
  
=Configuration=
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== Configuration ==
  
1. To allow telnet connections in xinetd:
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To allow telnet connections in xinetd, edit {{ic|/etc/xinetd.d/telnet}}, change {{ic|1=disable = yes}} to {{ic|1=disable = no}} and restart xinetd service.
<pre>
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# vi /etc/xinetd.d/telnet
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</pre>
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Change 'disable' from 'yes' to 'no'
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Enable [[systemd]] xinetd service if you wish to start it at boot time.
  
2. To allow telnet connections to your machine, add the following to /etc/hosts.allow:
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=== Testing the setup ===
<pre>
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in.telnetd: ALL
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</pre>
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3. Add xinetd to the "DAEMONS" section of your /etc/rc.conf file.
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Try opening a telnet connection to your server:
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$ telnet localhost
  
4. Reboot or restart xinetd:
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Note that you can not login as root.
<pre>
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# /etc/rc.d/xinetd restart
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</pre>
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Revision as of 10:06, 1 June 2013

Telnet is the traditional protocol for making remote console connections over TCP. Telnet is not secure and is mainly used to connect to legacy equipment nowadays. For a secure alternative see SSH.

Follow these instructions to configure an Arch Linux machine as a telnet server.

Installation

To use telnet only to connect to other machines, install inetutils.

To configure a telnet server, install xinetd as well.

Configuration

To allow telnet connections in xinetd, edit /etc/xinetd.d/telnet, change disable = yes to disable = no and restart xinetd service.

Enable systemd xinetd service if you wish to start it at boot time.

Testing the setup

Try opening a telnet connection to your server:

$ telnet localhost

Note that you can not login as root.