[gentoo-embedded] dropbear and telnetd problem

[gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

I want to use dropbear as a ssh server
I have got it via emerge, generated keys folowing code 
in /etc/init.d/dropbear, changed passwd in baselaout-lite environment, ran 
dropbear, but when i tryed to connect it hangs after password entering 
(password is ok, error is reported if is not)
No prompt, no shell.
What have i forgotten?


If i am trying to run telnetd (busybox link) i get segfault (other busybox 
applets are working properly)
What to do with?

Thanks
Jakub Ladman
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Re: [gentoo-embedded] dropbear and telnetd problem

[Kumba]

Jakub Ladman wrote:
> I want to use dropbear as a ssh server
> I have got it via emerge, generated keys folowing code 
> in /etc/init.d/dropbear, changed passwd in baselaout-lite environment, ran 
> dropbear, but when i tryed to connect it hangs after password entering 
> (password is ok, error is reported if is not)
> No prompt, no shell.
> What have i forgotten?
> 

Make sure you have a valid /etc/shells defined, and include /bin/sh and 
/bin/ash.  That one hung me up for a while.  Enabling dropbear via debug 
foreground mode may also reveal where else it fails if shells doesn't fix your 
issue.


--Kumba

-- 
Gentoo/MIPS Team Lead
Gentoo Foundation Board of Trustees

"Such is oft the course of deeds that move the wheels of the world: small hands 
do them because they must, while the eyes of the great are elsewhere."  --Elrond
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Re: [gentoo-embedded] dropbear and telnetd problem

[Ned Ludd]

On Sat, 2006-03-04 at 19:00 -0500, Kumba wrote:
> Jakub Ladman wrote:
> > I want to use dropbear as a ssh server
> > I have got it via emerge, generated keys folowing code 
> > in /etc/init.d/dropbear, changed passwd in baselaout-lite environment, ran 
> > dropbear, but when i tryed to connect it hangs after password entering 
> > (password is ok, error is reported if is not)
> > No prompt, no shell.
> > What have i forgotten?
> > 
> 
> Make sure you have a valid /etc/shells defined, and include /bin/sh and 
> /bin/ash.  That one hung me up for a while.  Enabling dropbear via debug 
> foreground mode may also reveal where else it fails if shells doesn't fix your 
> issue.

It can also be pretty bitchy about missing /dev/pts mounts

-- 
Ned Ludd <solar@gentoo.org>
Gentoo Linux

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Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

Thank you for answer.
> Make sure you have a valid /etc/shells defined, and include /bin/sh and

The file was there, but no /bin/sh inside. But no difference if i type it in.

> /bin/ash.  That one hung me up for a while.  Enabling dropbear via debug

How to enable it? Emerging it with debug use flag again?

> foreground mode may also reveal where else it fails if shells doesn't fix
> your issue.

Jakub Ladman

>
>
> --Kumba
>
> --
> Gentoo/MIPS Team Lead
> Gentoo Foundation Board of Trustees
>
> "Such is oft the course of deeds that move the wheels of the world: small
> hands do them because they must, while the eyes of the great are
> elsewhere."  --Elrond
-- 
gentoo-embedded@gentoo.org mailing list

Re: [gentoo-embedded] dropbear and telnetd problem

[Kumba]

Jakub Ladman wrote:
> Thank you for answer.
>> Make sure you have a valid /etc/shells defined, and include /bin/sh and
> 
> The file was there, but no /bin/sh inside. But no difference if i type it in.
> 
>> /bin/ash.  That one hung me up for a while.  Enabling dropbear via debug
> 
> How to enable it? Emerging it with debug use flag again?
> 
>> foreground mode may also reveal where else it fails if shells doesn't fix
>> your issue.
> 
> Jakub Ladman

It's a start up flag.  Try passing --help to get the full list of dropbear 
command-line options.


--Kumba

-- 
Gentoo/MIPS Team Lead
Gentoo Foundation Board of Trustees

"Such is oft the course of deeds that move the wheels of the world: small hands 
do them because they must, while the eyes of the great are elsewhere."  --Elrond
-- 
gentoo-embedded@gentoo.org mailing list

Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

On Sunday 05 of March 2006 02:12, Kumba wrote:
> Jakub Ladman wrote:
> > Thank you for answer.
> >
> >> Make sure you have a valid /etc/shells defined, and include /bin/sh and
> >
> > The file was there, but no /bin/sh inside. But no difference if i type it
> > in.
> >
> >> /bin/ash.  That one hung me up for a while.  Enabling dropbear via debug
> >
> > How to enable it? Emerging it with debug use flag again?
> >
> >> foreground mode may also reveal where else it fails if shells doesn't
> >> fix your issue.
> >
> > Jakub Ladman
>
> It's a start up flag.  Try passing --help to get the full list of dropbear
> command-line options.

dropbear -F 
Its output is absolutely silent :-(

Jakub

>
>
> --Kumba
>
> --
> Gentoo/MIPS Team Lead
> Gentoo Foundation Board of Trustees
>
> "Such is oft the course of deeds that move the wheels of the world: small
> hands do them because they must, while the eyes of the great are
> elsewhere."  --Elrond
-- 
gentoo-embedded@gentoo.org mailing list

Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

>
> It can also be pretty bitchy about missing /dev/pts mounts

The device node is there, but i do not know what to inspect with.
Jakub Ladman

>
> --
> Ned Ludd <solar@gentoo.org>
> Gentoo Linux
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Re: [gentoo-embedded] dropbear and telnetd problem

[Kumba]

Jakub Ladman wrote:
> 
> dropbear -F 
> Its output is absolutely silent :-(

Close, but you missed one more flag.  Remember, not only are you looking to 
launch into the foreground, but you want it to log all its info to the console.


--Kumba

-- 
Gentoo/MIPS Team Lead
Gentoo Foundation Board of Trustees

"Such is oft the course of deeds that move the wheels of the world: small hands 
do them because they must, while the eyes of the great are elsewhere."  --Elrond
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Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

/ $ dropbear -F -E
[16] Jan 01 00:02:03 Not forking
[17] Jan 01 00:02:26 Child connection from 10.16.1.130:45326
[17] Jan 01 00:02:28 Warning: Reading the random source seems to have blocked.
If you experience problems, you probably need to find a better entropy source.
[17] Jan 01 00:02:45 password auth succeeded for 'root' from 10.16.1.130:45326
[17] Jan 01 00:02:45 pty_allocate: openpty: No such device
[17] Jan 01 00:02:45 no pty was allocated, couldn't execute
                                     
But i don't know what to do. :-(
Jakub

On Sunday 05 of March 2006 02:44, Kumba wrote:
> Jakub Ladman wrote:
> > dropbear -F
> > Its output is absolutely silent :-(
>
> Close, but you missed one more flag.  Remember, not only are you looking to
> launch into the foreground, but you want it to log all its info to the
> console.
>
>
> --Kumba
>
> --
> Gentoo/MIPS Team Lead
> Gentoo Foundation Board of Trustees
>
> "Such is oft the course of deeds that move the wheels of the world: small
> hands do them because they must, while the eyes of the great are
> elsewhere."  --Elrond
-- 
gentoo-embedded@gentoo.org mailing list

Re: [gentoo-embedded] dropbear and telnetd problem

[Kumba]

Jakub Ladman wrote:
> / $ dropbear -F -E
> [16] Jan 01 00:02:03 Not forking
> [17] Jan 01 00:02:26 Child connection from 10.16.1.130:45326
> [17] Jan 01 00:02:28 Warning: Reading the random source seems to have blocked.
> If you experience problems, you probably need to find a better entropy source.
> [17] Jan 01 00:02:45 password auth succeeded for 'root' from 10.16.1.130:45326
> [17] Jan 01 00:02:45 pty_allocate: openpty: No such device
> [17] Jan 01 00:02:45 no pty was allocated, couldn't execute
>                                      
> But i don't know what to do. :-(

Sounds like the /dev/pts issue solar mentioned a few mails back.  Make sure 
/dev/pts exists, and you have it mounted as devpts (mount devpts /dev/pts -t 
devpts), and see if that fixes it.


--Kumba

--
Gentoo/MIPS Team Lead
Gentoo Foundation Board of Trustees

"Such is oft the course of deeds that move the wheels of the world: small hands 
do them because they must, while the eyes of the great are elsewhere."  --Elrond
-- 
gentoo-embedded@gentoo.org mailing list

Re: [gentoo-embedded] dropbear and telnetd problem

[Scott L. Price]

I had that same problem when /dev/ptmx (I think) was missing.  It seems 
to be some sort of multiplexer for ptys.  I am not sure of it's exact 
function.

Scott  =)

Kumba wrote:
> Jakub Ladman wrote:
> 
>> / $ dropbear -F -E
>> [16] Jan 01 00:02:03 Not forking
>> [17] Jan 01 00:02:26 Child connection from 10.16.1.130:45326
>> [17] Jan 01 00:02:28 Warning: Reading the random source seems to have 
>> blocked.
>> If you experience problems, you probably need to find a better entropy 
>> source.
>> [17] Jan 01 00:02:45 password auth succeeded for 'root' from 
>> 10.16.1.130:45326
>> [17] Jan 01 00:02:45 pty_allocate: openpty: No such device
>> [17] Jan 01 00:02:45 no pty was allocated, couldn't execute
>>                                      But i don't know what to do. :-(
> 
> 
> Sounds like the /dev/pts issue solar mentioned a few mails back.  Make 
> sure /dev/pts exists, and you have it mounted as devpts (mount devpts 
> /dev/pts -t devpts), and see if that fixes it.
> 
> 
> --Kumba
> 
> -- 
> Gentoo/MIPS Team Lead
> Gentoo Foundation Board of Trustees
> 
> "Such is oft the course of deeds that move the wheels of the world: 
> small hands do them because they must, while the eyes of the great are 
> elsewhere."  --Elrond

-- 
Electrical Engineering/Web Development
Dragonfly Technologies, Inc.                 http://www.dflytech.com
Hunt Utilities Group LLC                     http://www.hugllc.com
Hopkins, MN                                  (952) 935-2418

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Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

On Sunday 05 of March 2006 03:33, Kumba wrote:
> Jakub Ladman wrote:
> > / $ dropbear -F -E
> > [16] Jan 01 00:02:03 Not forking
> > [17] Jan 01 00:02:26 Child connection from 10.16.1.130:45326
> > [17] Jan 01 00:02:28 Warning: Reading the random source seems to have
> > blocked. If you experience problems, you probably need to find a better
> > entropy source. [17] Jan 01 00:02:45 password auth succeeded for 'root'
> > from 10.16.1.130:45326 [17] Jan 01 00:02:45 pty_allocate: openpty: No
> > such device
> > [17] Jan 01 00:02:45 no pty was allocated, couldn't execute
> >
> > But i don't know what to do. :-(
>
> Sounds like the /dev/pts issue solar mentioned a few mails back.  Make sure
> /dev/pts exists, and you have it mounted as devpts (mount devpts /dev/pts
> -t devpts), and see if that fixes it.

Mounting /dev/pts
mount: Mounting none on /dev/pts failed: No such device
:-(

>
>
> --Kumba
>
> --
> Gentoo/MIPS Team Lead
> Gentoo Foundation Board of Trustees
>
> "Such is oft the course of deeds that move the wheels of the world: small
> hands do them because they must, while the eyes of the great are
> elsewhere."  --Elrond
-- 
gentoo-embedded@gentoo.org mailing list

Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

> > Sounds like the /dev/pts issue solar mentioned a few mails back.  Make
> > sure /dev/pts exists, and you have it mounted as devpts (mount devpts
> > /dev/pts -t devpts), and see if that fixes it.
>
> Mounting /dev/pts
> mount: Mounting none on /dev/pts failed: No such device
>
I have two host computers, at home and at work. Unfortunately here, at home, i 
have forgotten to setup kernel symlinks. 
After making it i am trying to recompile everything.
I hope that it may help.
Jakub
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Re: [gentoo-embedded] dropbear and telnetd problem

[Jakub Ladman]

On Sunday 05 of March 2006 15:15, Jakub Ladman wrote:
> > > Sounds like the /dev/pts issue solar mentioned a few mails back.  Make
> > > sure /dev/pts exists, and you have it mounted as devpts (mount devpts
> > > /dev/pts -t devpts), and see if that fixes it.
> >
> > Mounting /dev/pts
> > mount: Mounting none on /dev/pts failed: No such device
>
> I have two host computers, at home and at work. Unfortunately here, at
> home, i have forgotten to setup kernel symlinks.
> After making it i am trying to recompile everything.
> I hope that it may help.

No it helps me not. I still see "mount: Mounting none on /dev/pts failed: No 
such device" and i am dead, i can't move any step forward.

Do you know, how to make /dev/pts work?

Jakub
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Re: [gentoo-embedded] dropbear and telnetd problem

[Natanael Copa]

On man, 2006-03-06 at 11:25 +0100, Jakub Ladman wrote:
> On Sunday 05 of March 2006 15:15, Jakub Ladman wrote:
> > > > Sounds like the /dev/pts issue solar mentioned a few mails back.  Make
> > > > sure /dev/pts exists, and you have it mounted as devpts (mount devpts
> > > > /dev/pts -t devpts), and see if that fixes it.
> > >
> > > Mounting /dev/pts
> > > mount: Mounting none on /dev/pts failed: No such device
> >
> > I have two host computers, at home and at work. Unfortunately here, at
> > home, i have forgotten to setup kernel symlinks.
> > After making it i am trying to recompile everything.
> > I hope that it may help.
> 
> No it helps me not. I still see "mount: Mounting none on /dev/pts failed: No 
> such device" and i am dead, i can't move any step forward.
> 
> Do you know, how to make /dev/pts work?

You need Unix98 PTY support in your kernel:

 Device Drivers  --->
	Character devices  --->
		[*] Unix98 PTY support


Here is a cut from my udev init.d script that mounts the pts.

        # create pts file system
        [ -d /dev/pts ] || mkdir --mode=755 /dev/pts
        [ -c /dev/ptmx ] || mknod --mode=666 /dev/ptmx c 5 2

        mount /dev/pts


and the line in fstab:

	none            /dev/pts        devpts  defaults 0 0

If you dont want depend on your fstab, replace the above
"mount /dev/pts" with "mount -t devpts none /dev/pts"



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Natanael Copa

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