topic Re: Telnet issue in Fedora Core 6 (ZOD) in Operating System - Linux

Telnet issue in Fedora Core 6 (ZOD)

Sandeepk_1 — Tue, 27 Feb 2007 04:17:05 GMT

I am unable to telnet to this box. indicates a error given below:

C:\Documents and Settings\34024>telnet 10.209.96.225

getnameinfo: localhost: Success
Temporary failure in name resolution: Illegal seek

Connection to host lost.

Re: Telnet issue in Fedora Core 6 (ZOD)

Ivan Ferreira — Tue, 27 Feb 2007 07:40:31 GMT

Use ssh instead of telnet, disable the telnet service.

Uset putty.exe as ssh client.

Re: Telnet issue in Fedora Core 6 (ZOD)

Stuart Browne — Tue, 27 Feb 2007 17:58:40 GMT

Whilst I agree with Ivan there on all counts, if 'telnet' is required (yes, some unfortunate applications are stupid), then you'll need to look at installing the 'telnet-server' package using 'yum'.

This will be launched from 'xinetd' so make sure that's set to start, and 'chkconfig telnet on' to enable it.

Note that you *WILL NOT* be able to log in as root by default.

Re: Telnet issue in Fedora Core 6 (ZOD)

Sandeepk_1 — Wed, 28 Feb 2007 01:09:56 GMT

Thanks Stuart....but i did not understand abou' the "root" not being able to login!!
Also could you explain the procedure of the telnet installation in "yum".
Thanks

Re: Telnet issue in Fedora Core 6 (ZOD)

Huc_1 — Wed, 28 Feb 2007 08:40:29 GMT

To install telnet for i386 using yum.
do the followinf login as root

# yum install telnet.i386

this will install telnet using yum for more info on yum you can do yum -h or man yum, you should have yum already installed on your system as this normaly ins installed on a Fedora core 6.

Root is not allowed by default to log in to target for security reasons, telnet is very unsecure in todays world, telenet user name and password are not encrypted so they can be read/seen by any body using sinffers tools like "tcpdump"... This is why we all strongly recommand that you use ssh if posible in your case.

Jean-Pierre Huc

Re: Telnet issue in Fedora Core 6 (ZOD)

Alexander Chuzhoy — Wed, 28 Feb 2007 16:45:05 GMT

After installing the telnet server you need to start it.
chkconfig telnet on
is the command.

At this point by default the root won't be allowed to login for security purposes.
To allow root to login submit this command from the console:
for i in `seq 1 20`; do echo pts/$i >> /etc/securetty; done

and wuala - you're ready to login as root.

The above command appends entries (pts/0,pts1..pts/20) to a file /etc/securetty. This files controls where root is allowed to login.

Re: Telnet issue in Fedora Core 6 (ZOD)

John Collier — Thu, 01 Mar 2007 08:40:03 GMT

Just a thought on using yum to install/remove packages from your system:

The command above (yum install telnet.i386) is a valid command and there is absolutely nothing wrong with it, but you may actually have a 64 bit system. For general install situations, I would normally recommend a simple

yum install {package-name}

Without the extras of '.i386'. This will install the same version of the package that your kernel is currently running in most cases.

If you have not done so already, you may want to install the graphical front end to yum and the extensions available for it. The quick and easy way to do this is a simple:

yum install yum*

That will get you yumex (the graphical extension) plus several other neat little plugins.

The main advantage to using yumex is for those occasions when you know you want something that deals with, for example, telnet but you don't have any idea what the package name is. Simply open up yumex, do a quick search, and install it on the spot.

It can be very useful if you have one of those 'blond computer user moments'.

Re: Telnet issue in Fedora Core 6 (ZOD)

Sandeepk_1 — Wed, 07 Mar 2007 05:43:23 GMT

Thanks all for your support!!