COM-208: Remote connection with "ssh" times out

Good afternoon,

When I try to use the ssh command to establish a remote connection to icin3pc01.epfl.ch with my gaspar as instructed during the lab, the operation times out, is this normal? I am not working through vdi.

Thank you for your understanding,

Omar El Malki

Re: Remote connection with "ssh" times out

by Georgia Fragkouli - Sunday, 20 September 2020, 16:54

Dear Omar,

You must be connected to the EPFL VPN for ssh to work. Can you please try this and let us know whether this solves the problem?

Best,
Georgia

Re: Remote connection with "ssh" times out

by Omar El Malki - Sunday, 20 September 2020, 17:23

Hi,

I just tried it while connecting to the vpn, the operation does not timeout anymore, but I get the following error instead:

ssh: connect to host icin3pc01.epfl.ch port 22: Connection refused

Re: Remote connection with "ssh" times out

by Katerina Argyraki - Monday, 21 September 2020, 11:48

Hi Omar,

Try icin3pc03.epfl.ch

The expected behavior is that you won't successfully connect, but ssh will sit there waiting for a password prompt. That should be enough to complete the lab. (It just worked for me.)

There's only one question in the lab that depends on this SSH connection: "Can you tell which one corresponds to INF3 computer you have ssh-ed into?"

(As a side note: It seems that the sysadmins have disabled ssh on most of the INF3 servers. I can't blame them, because these servers are not supposed to be used for people to ssh in, in general. )

Let me know if it worked.

Re: Remote connection with "ssh" times out

by Katerina Argyraki - Monday, 21 September 2020, 12:00

Take a look at this as well:

https://moodlearchive.epfl.ch/2020-2021/mod/forum/discuss.php?d=41910#p87272

Re: Remote connection with "ssh" times out

by Omar El Malki - Monday, 21 September 2020, 12:10

Hello,

The pc11 worked for me, thanks a lot! The behaviour with pc03 was also as you expected, it waits for a bit and then times out.

Have a great day,

Omar.