Modern Linux distributions configure OpenSSH client to refuse connecting to servers without newer ciphers or key exchange algos. Symptoms are:
Unable to negotiate with 192.168.200.83 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss
The solution is clunky, so I created a small Debian-based container with OpenSSH client installed, it is an “oldstable” version old enough not to have a modern SSH client with modern configuration. Usage:
podman run -it --rm ghcr.io/lzap/old-ssh-client:latest ssh root@192.168.122.2
You can inspect the container here: https://github.com/lzap/old-ssh-client