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Old 07-21-2011, 12:56 AM   #1
shipon_97
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Disable telnet command from Linux client end !


Dear Friends ,

From Linux client end I can easily telnet to a remote Linux server easily , Like :


[root@apps1 ~]# telnet 192.168.1.14
Trying 192.168.1.14...
Connected to 192.168.1.14 (192.168.1.14).
Escape character is '^]'.

catalog.aibl.com (Linux release 2.6.18-8.el5 #1 SMP Tue Jun 5 23:25:19 EDT 2007) (1)

login:


But I want to disable the "telnet" command from the client end , so that I cannot telnet to a remote linux server from the Linux client end .

Waiting for kind reply ... ..
 
Old 07-21-2011, 01:26 AM   #2
chrism01
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Just remove the telnet client SW
 
Old 07-21-2011, 02:02 AM   #3
shipon_97
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Thx for kind reply ..

Would u plz tell me how to remove the telnet client software ...., I remove the telnet package from the client end , but still it works ..

See the below output plz :

>[root@apps2 ~]# rpm -q telnet
telnet-0.17-31.EL4.5
[root@apps2 ~]# rpm -e --nodeps telnet
[root@apps2 ~]# rpm -q telnet
package telnet is not installed
[root@apps2 ~]# telnet 192.168.1.14
Trying 192.168.1.14...
Connected to 192.168.1.14 (192.168.1.14).
Escape character is '^]'.

test.com (Linux release 2.6.18-8.el5 #1 SMP Tue Jun 5 23:25:19 EDT 2007) (1)

login:
 
Old 07-21-2011, 05:23 AM   #4
Oliv'
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Distribution: Gentoo
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Hello,

Well you could try a command like:
Code:
rpm -q --whatprovides telnet
to check if another package provides telnet binary.
Also be aware that some tools like netcat easily allows you to connect to a telnet server.

Kind regards,

Oliv'
 
Old 07-21-2011, 11:04 AM   #5
Wim Sturkenboom
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Why do you want to do that
 
Old 07-21-2011, 11:23 AM   #6
TobiSGD
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Wouldn't it be the better approach to remove telnet from the server, since it is deprecated and insecure?
 
Old 07-21-2011, 08:26 PM   #7
chrism01
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That would be my preference; I was giving the OP the benefit of the doubt there... should have asked anyway .

A related article of why (& how) not to use rsh/telnet etc http://www.informit.com/articles/art...p=169465&rll=1

Last edited by chrism01; 07-21-2011 at 08:27 PM.
 
Old 07-23-2011, 01:34 AM   #8
Wim Sturkenboom
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Quote:
Originally Posted by TobiSGD View Post
Wouldn't it be the better approach to remove telnet from the server, since it is deprecated and insecure?
It's why I asked. Still waiting for the reply
 
  


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