Cannot connect status is SSH_Connection_failure. Could not aggree on signature algorithm

[Pranita2]

Hello,

When i am trying to discover Oracle Linux servers, i am getting error as follows:

Can anyone let me know how to resolve this error?

Thanks,

Pranita

[Jim Palmer]

Pranita,

It might be a limitation on the SSH client being used by the Oracle Linux servers (especially if they're very old). In a previous life I had issues with connecting to Solaris & AIX servers because the openSSH package on the targets (server) did not have support for the newer algorithms. Therefore I had to manually include support for those older algorithms.

So the client initiating the connection (e.g. the MID server) required a newer more secure hash (SHA-256) and had deprecated older ones (SHA-1), while the older client only supported SHA-1.

See: https://www.openssh.com/txt/release-8.2 for an example

This may help:

https://docs.servicenow.com/bundle/sandiego-servicenow-platform/page/product/mid-server/reference/mid-ssh-algorithms.html

[Pranita2]

Hi Jim,

Thank you for your response, can you please also let me know if these algorithms are build in available as OOB in Service Now or we need to update them ?

If we need to update then where we need to do that?

Thanks,

Pranita