topic Re: executing commands using ssh protocol- message is coming in Operating System - Linux

executing commands using ssh protocol- message is coming

ManojKumar — Wed, 29 Mar 2006 11:19:41 GMT

Hi all,

Following message is coming when i am going to login a device using ssh protocol .

It is coming first time only .

Message ::

The authenticity of host '192.*.*.* (192.*.*.*)' can't be established.
RSA key fingerprint is 14:15:0f:e1:1b:8d:d6:ed:5b:cd:f5:30:1f:a2:49:c2.
Are you sure you want to continue connecting (yes/no)?

Through my program i am not able to provide "yes" or "no"- (i am working on .net platform)

Problem:
How to get rid of this message .
If it is possible to ignore this message then plz let me know the same .

regards,
manoj

Re: executing commands using ssh protocol- message is coming

Steven E. Protter — Wed, 29 Mar 2006 11:22:47 GMT

Shalom manoj,

You need to do the ssh to the host one time interactively, answer the question then the message will stop happening.

If you answer yes of course.

SEP

Re: executing commands using ssh protocol- message is coming

Ivan Ferreira — Wed, 29 Mar 2006 11:23:29 GMT

You should add the remote public key to your local list of known hosts. Where? whell, it depends of the ssh client, check your ssh client documentation.

Re: executing commands using ssh protocol- message is coming

ManojKumar — Wed, 29 Mar 2006 11:44:40 GMT

Hi all,

Thanks for a quick response .

First of all i want to tell you that i have to do everything using a .Net(c#) program- i can't enter "yes" manually .

Copying public keys to the known_hosts file is enough or not - i m not sure about that- .

Can't we ignore or bypass this message .

regards,

Re: executing commands using ssh protocol- message is coming

Vitaly Karasik_1 — Wed, 29 Mar 2006 12:04:13 GMT

If your client(program) is able to connect to ssh server second time, you may ignore this message - probably .net ssh library answer "yes" automatically.

Re: executing commands using ssh protocol- message is coming

Vipulinux — Thu, 30 Mar 2006 04:42:24 GMT

Hi
Have u tried public key authentication...it shoul dnot ask for yes/no

Check this out:

http://www.linuxhomenetworking.com/linux-hn/ssh-server.htm

Cheers

Re: executing commands using ssh protocol- message is coming

Jeroen Peereboom — Thu, 30 Mar 2006 13:51:53 GMT

Manoj.

if you use ssh to connect to an unknown machine you are asked to say yes. That's one of the reasons it is called secure shell. The method used (comparing keys) helps in identifying attacks by replacing the machine by another one.

Somehow you must supply the ssh client with the server's key, either by logging in manually one time, or by generating keys and exchange them.

JP

Re: executing commands using ssh protocol- message is coming

Mike Stroyan — Thu, 30 Mar 2006 14:38:17 GMT

If you really want to give up the security of knowing when host has been replaced, then you could add
StrictHostKeyChecking no
to the "Host *" section in /etc/ssh/ssh_config or ~/.ssh/ssh_config. That tells ssh to add a new host key without even asking.