Can't connect with SSH

[pixx]

I try to connect my Squeezebox Touch with that command in the Mac terminal:

ssh -l root 192.***.***.**

The response is:

Unable to negotiate with 192.***.***.** port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

Why doesn't it work?

Thank you.

[mrw]

I try to connect my Squeezebox Touch with that command in the Mac terminal:

ssh -l root 192.***.***.**

The response is:

Unable to negotiate with 192.***.***.** port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

Why doesn't it work?

Thank you.

Because the key/ciphers implemented on the Touch are old, and modern ssh clients won't, by default, use them. But you should be able to "force" use of the the older methods. I routinely use this on my macOS box:

ssh -o KexAlgorithms=diffie-hellman-group1-sha1 -o Ciphers=aes128-cbc,3des-cbc,aes256-cbc root@myradio

[pixx]

Your proposal works or as alternative: ssh -c aes128-cbc -oKexAlgorithms=+diffie-hellman-group1-sha1 root@myradio

Thank you

[mrw]

Your proposal works or as alternative: ssh -c aes128-cbc -oKexAlgorithms=+diffie-hellman-group1-sha1 root@myradio

If you haven't discovered the ssh config file, you could bake the options into that. Refer to the manpage man ssh_config.

Here's a snippet from mine, stored in file ~/.ssh/config. My devices are named blackradio, whiteradio, and squeezeboxcontro.

# These older SSH servers do not support modern key
# exchange stuff or modern ciphers.
Host blackradio* whiteradio* squeezeboxcontro*
 CheckHostIP no
 KexAlgorithms +diffie-hellman-group1-sha1
 Ciphers +aes128-cbc,3des-cbc,aes256-cbc

So now I just log in as, e.g., ssh root@blackradio