I'm using tramp to access files in remote via Bastion server using following tramp syntax:
The problem is, whenever I access REAL-HOST,
$HOME/.ssh/known_hosts in BASTION-HOST is updated. Since most hosts behind the BASTION-HOST are ephemeral, I don't want TRAMP update
After looking at
tramp-methods, TRAMP does uses
-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no on the first host (which is BASTION in this case), but it looks like these options do not propagates to multi-hops.
I'm using Emacs 25.1.1 (Mac)