ssh between 2 machine without password

[Michael Velez]

> >> -----Original Message-----
> >> From: redhat-list-bounces at redhat.com
> >> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Rushan Sobar
> >> Sent: Saturday, March 05, 2005 7:35 AM
> >> To: General Red Hat Linux discussion list
> >> Subject: ssh between 2 machine without password
> >>
> >> Hi,
> >> on the following steps
> >>
> >> to generate a public/private DSA key pair on Ooga.
> >>   ooga% ssh-keygen -t dsa -f ~/.ssh/id_dsa
> >>
> >> When you are asked for a passphrase, leave it empty. Now send
> >> the public key to Booga.
> >>
> >>   ooga% cd .ssh
> >>   ooga% scp id_dsa.pub user at booga:~/.ssh
> >>
> >> Next, log in to Booga and add the public key to the list of
> >> authorized keys.
> >>
> >>   ooga% ssh user at booga
> >>
> >>   booga% cd .ssh
> >>   booga% cat id_dsa.pub >> authorized_keys2
> >>   booga% chmod 640 authorized_keys2
> >>   booga% rm -f id_dsa.pub
> >>
> >> the filename is authorized_keys2, not authorized_keys. That's
> >> it; now ready to ssh from Ooga to Booga without having to
> >> enter a password.
> >>
> >> what if i want to be able to ssh from Booga to Oooga without
> >> having to enter a password?
> >>
> >> i mean the steps up enable to connect from Ooga to Booga
> >> without pass but from Booga to Ooga it ask for pass, i want 2
> >> way without pass!!
> >>
> >> Anyhelp?
> >> redhat-list mailing list
> >> unsubscribe mailto:redhat-list-request at redhat.com?subject=subscribe
> >> https://www.redhat.com/mailman/listinfo/redhat-list
> >>
> >
> > You need to do the same process you did before by inverting 
> the commands 
> > you
> > do on ooga and booga.  That is, generate a dsa key on booga 
> then take the
> > new id_dsa.pub that has been generated on booga and put it into the
> > authorized_keys (or authorized_keys2 depending on your 
> config file) on 
> > ooga.
> > Same process but mirrored.
> >
> > It's best to generate one key per direction, as opposed to 
> just using the
> > previously generated key.
> >
> > Michael
> 
> Yes but what happen when I reverse and mirror the steps , 
> booga connect to 
> Ooga without passwd and the 1st Ooga to Booga start asking for 
> passwd.everytime I reverse the command it start connect 
> without passwd and 
> the 1st start asking for password....
> 
> Regards
> -- 
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> 

Rushan,

Do all the following steps 1 after the other and the process will work:

 	ooga% ssh-keygen -t dsa -f ~/.ssh/id_dsa
 	ooga% mv id_dsa.pub ooga_id_dsa.pub
 	ooga% scp ooga_id_dsa.pub user at booga:~/.ssh
	ooga% ssh user at booga

	booga% cd .ssh
	booga% cat ooga_id_dsa.pub >> authorized_keys2
	booga% chmod 640 authorized_keys2
	booga% ssh-keygen -t dsa -f id_dsa
	booga% mv id_dsa.pub booga_id_dsa.pub
	booga% exit

	ooga% cd ~/.ssh
	ooga% scp user at booga:~/.ssh/booga_id_dsa.pub ~/.ssh
	ooga% cat booga_id_dsa.pub >> authorized_keys2
	ooga% chmod 640 authorized_keys2

If you do all the steps above and generate a key on both machines without
specifying a passphrase for either key, you will be able to do what you
want.  What this does is create a unique private key for each machine and
put the corresponding public key in the other machine's authorized_keys
file.  You have generated two public/private key pairs, one on each machine.

Afterwards if you want, you can remove the public keys (booga_id_dsa.pub and
ooga_id_dsa.pub) on both ooga and booga.  You do that with the following
command:

	rm -f booga_id_dsa.pub ooga_id_dsa.pub

Execute the above command while in the ~/.ssh directory on both ooga and
booga.  I renamed the files from the default id_dsa.pub only to avoid
confusion that there are now two public key files, one for ooga and one for
booga.

Hope this clears things up,
Michael