related to telnetd

related to telnetd

[Navani Kamal Srivastava]

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Hello,

I am looking for "telnetd" utility so that I can take telnet session of my board. Can you please tell me in order to include this utility in my rootfs which packages I need to include in my *.bb file.

Thanks & Regards,
Navani Kamal Srivastava


Larsen & Toubro Limited

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Re: related to telnetd

[Paul Eggleton]

On Monday 28 November 2011 09:44:42 Navani Kamal Srivastava wrote:
> I am looking for "telnetd" utility so that I can take telnet session of my
> board. Can you please tell me in order to include this utility in my rootfs
> which packages I need to include in my *.bb file.

So the first question (which you might be expecting) is, is there a good reason 
why you would not use ssh in preference to telnet?

You could enable CONFIG_TELNETD in busybox if you really need telnetd, but for 
most purposes dropbear providing ssh should be enough for remote shell access.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: related to telnetd

[Paul Eggleton]

On Wednesday 30 November 2011 09:01:57 Navani Kamal Srivastava wrote:
> I give a try to both dropbear and busybox (enabling telnetd) . Nothing
> worked for me. I got telnetd utility also but it didn't worked. When I try
> to take session on Putty, it restrict me with error message "Connection
> Refused".

I would suggest running through the following troubleshooting steps:

1) Is dropbear actually installed?
2) Is it running?
3) Is it listening? (netstat -tl)

I assume when you attempted to connect with dropbear that you selected the ssh 
protocol in PuTTY?

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: related to telnetd

[Paul Eggleton]

On Wednesday 07 December 2011 06:51:55 Navani Kamal Srivastava wrote:
> Can you please confirm me that
> 1- busybox utilities are sufficient to take telnet session of the board or
> do I need to install netkit-telnet-1.17 package? 

Yes this will work if you enable CONFIG_TELNETD and CONFIG_TELNETD_STANDALONE 
in the busybox configuration. telnetd will not be started automatically though, 
you will need to add an initscript. However I would suggest you consider using 
ssh if you have no reason not to - you won't need to do any additional work 
then.

> 2- I require
> /etc/securetty in my rootfs. Which and all option I need to configure in
> busybox configuration to get  this particular file. I have already enabled
> CONFIG_FEATURE_SECURETTY feature.

This file is provided by shadow, so you'd need to add that to your 
IMAGE_INSTALL (or POKY_EXTRA_INSTALL).

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre

Re: related to telnetd

[Paul Eggleton]

On Monday 12 December 2011 14:45:23 Navani Kamal Srivastava wrote:
> I did the same , it worked for me. Thanks a lot. As per our project
> requirement we can't go with ssh that's why I am struggling with telnet..
> Can you please tell me how I can add an initscript?

I would suggest having a look at how it is done for other items in 
busybox.inc. You'll need to put ${sbindir}/telnetd in its own package.

> One more thing I want to ask is what modification I need to do to generate
> poky image, which can load kernel module automatically at startup?

There was a discussion about this previously:
https://lists.yoctoproject.org/pipermail/poky/2011-April/005521.html

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre