CentOS / telnet

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telnet 構築メモ。(CentOS 4.4 上で)

参考にしたサイト

http://kajuhome.com/telnet.shtml

パッケージのダウンロード

# yum -y install telnet-server
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
extras    : ################################################## 97/97
Added 97 new packages, deleted 0 old in 2.05 seconds
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for telnet-server to pack into transaction set.
telnet-server-0.17-31.EL4 100% |=========================| 7.6 kB    00:00
---> Package telnet-server.i386 1:0.17-31.EL4.3 set to be updated
--> Running transaction check

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 telnet-server           i386       1:0.17-31.EL4.3  base               33 k

Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)
Total download size: 33 k
Downloading Packages:
(1/1): telnet-server-0.17 100% |=========================|  33 kB    00:00
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing: telnet-server                ######################### [1/1]

Installed: telnet-server.i386 1:0.17-31.EL4.3
Complete!
#

/etc/xinetd.d/telnet の、disable=yes を no にする。

システムの再起動またはデーモンの再起動

# reboot

または

# /etc/init.d/xinetd restart

テスト時は設定不要なステップ(外部ネットワークと接続する場合は必要)

/etc/hosts.allow に、許可するホストを追加

#
# hosts.allow   This file describes the names of the hosts which are
#               allowed to use the local INET services, as decided
#               by the '/usr/sbin/tcpd' server.
#

in.telnetd : 192.168.0. 127.0.0.1

/etc/hosts.deny に、許可しないホストを追加

#
# hosts.deny    This file describes the names of the hosts which are
#               *not* allowed to use the local INET services, as decided
#               by the '/usr/sbin/tcpd' server.
#
# The portmap line is redundant, but it is left to remind you that
# the new secure portmap uses hosts.deny and hosts.allow.  In particular
# you should know that NFS uses portmap!

in.telnetd : ALL

ALL とすれば、hosts.allow に記載のないホストから接続できなくなる。

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名前: コメント:

• 2008-10-25 (Sat) 20:17:19 ukpftts? : GHLQPXulKu
• 2006-11-15 (Wed) 23:20:24 Hondarer : そうです。だから最初にインストールするんです。
• 2006-11-15 (Wed) 23:02:45 unknown? : CentOS4.4 には /etc/xinetd.d/telnet がない！