Re: How to configure my bastion ?

[Stéphane Senesi]

Michael

Thanks for your support . Answers in the text :

Michael Albinus wrote, On 02/05/2012 14:55:
> Stéphane Senesi<address@hidden>  writes:
>
>    
> > Dear all,
> >      
> Hi Stéphane,
>
> first of all: Which Emacs and Tramp versions are you running?
>    

GNU Emacs 23.1.1 and tramp-version 2.2.3


>    
> > My gentle network administrator provided me with bastion that can work
> > in two ways :
> >      1- either by typing "ssh -l my_account bastion", in which case I
> > am provided with a menu for choosing among a limited list of hosts.
> > After the choice, I am directly prompted with the password on the
> > chosen remote host
> >      2- or by typing "ssh -l my_account bastion remote_host", in which
> > case I am directly prompted with the password on that host
> >
> >    - then trying case 1, I tried to customize the
> > 'tramp-actions-before-shell to process the sequence where I am
> > prompted with a menu, but quickly realized that
> > tramp-actions-before-shell do address the prompting which occur after
> > password prompting.
> >      
> Not only. Show the menu you are prompted with; maybe we could construct
> a proper action.
>    

Here it is :

>  ssh -l my_bastion_user  bastion
| ID | Site
|----|-----------------------------------
|  0 | address@hidden
|  1 | address@hidden
|  2 | address@hidden
|  3 | address@hidden
|  4 | address@hidden
|  5 | address@hidden
Connect to:




>    
> >      - again with case 2, I also tried to configure my ~/.ssh/config
> > file to provide for the bastion a "User:" field which is a combined
> > string including both "my_account bastion" and "remote_host" (because
> > this is what works on the interactive ssh ), but ssh client then
> > either considers that my config file is garbled (if I put double
> > quotes around both strings) or take the whole string as the user name
> > on the bastion (which of course won't work)
> >      
> For this case (and the one without configuring ~/.ssh/config) I would
> like to see the Tramp debug buffer, after setting tramp-verbose to 6.
>    

The case without using the .ssh/config , so trying to access 
'/ssh:address@hidden:' shows as case 2a in the attached files. 
I had to interrupt by Ctrl-G.

For case 2b (see similar files attached) I tried to contact /ssh:vu: and 
have the following lines in my .ssh/config file :
> Host vu
>      Hostname mybastion
>      User "my_bastion_user   address@hidden"
Then , I am requested with a password for 'my_bastion_user 
address@hidden@bastion'
(namely by: 'stephane.senesi address@hidden@beleg-int.meteo.fr's 
password: ' ), which is consistent with the content of the config line, 
but inadequate

For case 2c (see similar files attached) I tried to contact /ssh:uwab: 
and have the following lines in my .ssh/config file :
> Host uwab
>      Hostname mybastion
>      User my_bastion_user

So, its just the same as case 2a but using the config file. The 
tramp-buffer shows the menu I am prompted with. If we could have tramp 
provide an answer (which could depend on the hostname used, e.g. uwab, 
gwab, vwab ...), the next phase would the prompting for the password on 
the remote host (which handling is built-in, AFAIU ?)


Regards

S





>    
> > Thanks for any help
> >
> > Here follows my code for method "wab"
> >
> > Best regards
> > S
> >      
> Best regards, Michael.
>
>    


--
Stéphane Sénési
Ingénieur - équipe Assemblage du Système Terre
Centre National de Recherches Météorologiques
Groupe de Météorologie à Grande Echelle et Climat

CNRM/GMGEC/ASTER
42 Av Coriolis
F-31057 Toulouse Cedex 1

+33.5.61.07.99.31 (Fax :....9610)

debug-buffer-case-2a
Description: Binary data

tramp-buffer-case-2a
Description: Text document

debug-buffer-case-2b
Description: Binary data

tramp-buffer-case-2b
Description: Text document

debug-buffer-case-2c
Description: Binary data

tramp-buffer-case-2c
Description: Text document