paramiko Incompatible ssh peer (no acceptable kex algorithm)

Question

I\'m getting the following error when trying to ssh to a Cisco ACS device using the paramiko library. I\'ve used paramiko in python without issue, and I can ssh to this box

Answer 1

This may not help the OP's situation, but hopefully it may help someone else with the same error.

I ran into a situation where one script would SSH into a system just fine, but another similar script would fail with the same

paramiko.SSHException: Incompatible ssh peer (no acceptable kex algorithm)

error.

The situation turned out to be the shebang line at the top of my script:

#!/usr/bin/python

Would fail, while

#!/usr/bin/env python

would succeed.

I'm using virtualenvs on my system, so the failing /usr/bin/python version was using the older Paramiko version installed on the system, whereas the /usr/bin/env python version was using the newer Paramiko installation in my virtualenv.