Connection on PSMN servers

Important

For your First connection please follow these instructions to generate your PSMN SSH key pair

To work on PSMN cluster, you need firstly to connect to allo-psmn, which allows to connect to one of PSMN front-end servers (login nodes). The connection to allo-psmn is working directly from ENS network, or via a gateway server from outside of ENS network :

PSMN internal/external connections synoptic — Fig. 3 Internal or External PSMN gateways synoptic

Warning

allo-psmn is a connection server, it only allows you to access and to transfer your files and that’s all.

Its only purpose is to connect to the PSMN’s network to access front machines. To work on PSMN cluster, you need to connect from allo-psmn to one of the front-end servers (login nodes).

From ENS network

To connect to PSMN cluster, you need to use SSH. The easiest way is to use the following command:

From a Linux or a MacOS X computer, open a terminal and type:

ssh mylogin@allo-psmn.psmn.ens-lyon.fr
# enter your PSMN password, as asked

replace mylogin by your login (as provided by PSMN).

From a Windows computer, refer to OpenSSH activation for Windows 10.

From outside ENS network

In order to connect on allo-psmn from outside ENS network, you must use one of the SSH gateways:

ssh.psmn.ens-lyon.fr

or ssh.ens-lyon.fr, if you have an user account at ENS de Lyon,

Warning

ssh.psmn and ssh.ens are connection servers (or gateways). There is no home space on it (~5MiB max). Your real home starts at allo-psmn.

Fig. 4 PSMN gateways synoptic (`ssh.ens` or `ssh.psmn`)

Therefore, in order to connect on allo-psmn from outside ENS network, first you need to connect to the SSH gateway ssh.psmn.ens-lyon.fr (or ssh.ens-lyon.fr), then you can connect to allo-psmn:

ssh mylogin@ssh.psmn.ens-lyon.fr (or ssh mylogin@ssh.ens-lyon.fr)
# enter your PSMN password (or ENS password), as asked
# then
ssh mylogin@allo-psmn.psmn.ens-lyon.fr
# enter your PSMN password, as asked

One-step connection:

ssh -X -oProxyCommand="ssh mylogin@ssh.psmn.ens-lyon.fr netcat -w1 allo-psmn %p" mylogin@allo-psmn.psmn.ens-lyon.fr
# you'll have to give your PSMN password twice

or

ssh -X -oProxyCommand="ssh mylogin@ssh.ens-lyon.fr netcat -w1 allo-psmn %p" mylogin@allo-psmn.psmn.ens-lyon.fr
# you'll have to give your ENS password, then your PSMN password