Hi,
Am 19.03.2009 um 10:22 schrieb Francesco Pietra:
I have a computing machine and a desktop ssh passwordless
interconnected through a Zyxel router (which is dhpc on Internet). I
have now added a second computing machine. I am unable to get all
three machines passwordless interconnected at the same time. Just only
two. If I want to have the third computer passwordless connected to
one of the other two, I have to exchange id_rsa.pub between the two
again. Mistake or intrinsic feature of ssh?
What I did:
(1)generating the keys with "ssh-keygen -t rsa"
(2) getting "reserved" the machines on the router
(3)scp id_rsa.pub to the "authorized_keys"
- you can have more than one line in the authorized keys file, hence
put there the id_rsa.pub from all other nodes in addition.
- when you need this only for interactive work, you can have a local
ss-agent running on your desktop and put in ~/.ssh/config and on both
node a two lines:
Host *
ForwardAgent yes"
good explanation you can find here: http://unixwiz.net/techtips/ssh-
agent-forwarding.html
- another option might be to setup /etc/ssh/ssh_known_hosts on your
two compurte nodes to include per line the short hostname, the FQDN,
the TCP-IP address besides the other hosts ssh keys (not the user's
one) as this would avoid any password or adding of the machines to
you personal ~/.ssh/known_hosts file. This won't work with your
workstation of course as it's TCP/IP address varies.
-- Reuti
It is also mandatory that asking the "date" to the other computer
(slogin ... date), the date is given without asking the password. That
is an issue of a computational code that for its internal
parallelization needs that (I have not investigated why).
thanks
francesco
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