Ssh with JSch to a remote machine that asks twice for username and password

Question

I am just doing ssh me1@ipaddress to a remote machine, where I can't understand what is happening. This command again asks for username and password twice like this:

$ ssh me1@ip

username : me2
password :

I am using JSch which allows specifying one set of username and password like shown below syntax:

new JSch().getSession(userName, connectionIP, connectionPort)

But in this scenario, we need to provide two usernames as me1 and me2.

How can I achieve this using JSch or any other library in Java?

What happens if you only do `ssh ipaddress` (no `me1@`)? What does the username/password prompts look like then? The `username`/`password` prompt you get could be from a command started when you have logged in, i.e. something that doesn't have anything to do with ssh. — Roger Gustavsson, Jun 26 '19 at 10:35
@RogerGustavsson without `me1@`, It directly asks for password but as expected it doesn't match with my password. — Bhanuchander Udhayakumar, Jun 26 '19 at 10:41
So, no question for a username? Maybe your ssh client is set up to use a default username? — Roger Gustavsson, Jun 26 '19 at 10:45
@RogerGustavsson No. No. Only with `me1@`, it asks again for `username :` and `password :` as shown above. Without that it directly asks password and my password, doesn't match there. ..! :( — Bhanuchander Udhayakumar, Jun 26 '19 at 10:51

Martin Prikryl · Accepted Answer · 2019-06-27T12:12:53.317

2

Your ssh commands starts a shell session. The prompts for the credentials are just regular I/O prompts, as any other. Nothing credentials-specific. So you should provide the input the way, you would provide any other input – by writing it to the shell input stream.

edited Jun 27 '19 at 12:12

answered Jun 26 '19 at 10:34

Martin Prikryl

188,800
56
490
992

Thanks for pointing out the obvious deficiency within my question. Just wondering: s there any specific purpose or reasoning why one have or want to use "two" login names like this? – GhostCat Jun 26 '19 at 10:35
Thanks for your response. I will try to solve this with `Shell` Channel Type which is very much fit to your answer. – Bhanuchander Udhayakumar Jun 26 '19 at 10:44
As I 've changed to my implementation channel type from `exec` to `shell`. It works fine. Thanks and Happy learning...! :) – Bhanuchander Udhayakumar Jun 26 '19 at 11:28
1

@GhostCat No idea. It's actually possible that the `me1` it not really needed. Maybe the only real login is the `me2`. Some legacy devices that switched from Telnet to SSH do that - They do not use SSH authentication mechanism, but keep the old Telnet-like I/O prompts. – Martin Prikryl Jun 26 '19 at 11:40

Ssh with JSch to a remote machine that asks twice for username and password

1 Answers1