You might want to consider shellinabox as a more secure option.

On Fri, Aug 4, 2023 at 10:16 AM John Sellens via talk <[email protected]>
wrote:

> You can often ssh from newer systems to older systems by telling ssh
> that it's allowed to use older options.
>
> For example, to connect from ubuntu 22 to centos 5, my .ssh/config file has
>
>   Host centos5.example.com
>     KexAlgorithms +diffie-hellman-group1-sha1
>     # ubuntu 22+ needs
>     HostkeyAlgorithms +ssh-rsa
>     PubkeyAcceptedKeyTypes +ssh-rsa
>
> and I left myself a reference to:
>     https://www.openssh.com/legacy.html
>
> Hope someone finds that helpful - cheers
>
> John
>
>
> On Fri, 2023/08/04 09:58:44AM -0400, D. Hugh Redelmeier via talk <
> [email protected]> wrote:
> | Recent Fedora systems' SSH client won't access CentOS 6 servers.
> |
> |       Unable to negotiate with x.y.z.w port 22: no matching host key
> type
> |       found. Their offer: ssh-rsa,ssh-dss
> |
> | (One should not still be running CentOS 6!)
> |
> | All my workstations run recent Fedora systems.  How could I access this
> | server?
> |
> | It turns out the Windows has an SSH client these days and it isn't as
> | picky about ciphers as Fedora.
> |
> | It could well be that other Linux distros support older ciphers too.
> |
> | This isn't generally a good thing: those ciphers were retired due to
> | security concerns.
> | ---
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