Disabling Dropbear ssh-rsa support?

Tim Small tim at seoss.co.uk
Fri Jul 4 15:08:54 PDT 2025


On 04/07/2025 17:33, Thibaut wrote:
> Also does this affect the ssh client as well? This may be more relevant than the server side of things: a lot old(er) SSH server implementations only offer rsa-sha1 (e.g. off the top of my head, HP iLO 4), so users may lose the ability to connect there: this should be advertised.

I don't know if the proposed change would impact the dropbear ssh client 
either, but if it does, then a straightforward workaround to access such 
outdated ssh servers via an OpenWrt device, would be to use e.g. OpenSSH 
on the users desktop to connect through the OpenWrt device using the 
OpenSSH "jump host" feature:

user at laptop:~$ ssh admin at oldthing -J root at openwrtdevice.elsewhere

...which is probably what most users would (or at least should) be doing 
already?

For those that don't / can't use jumphost, they could always install the 
openssh-client package directly on the OpenWrt device instead?

Tim.



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