[ale] Weird ssh problem

[Ron]

On 2025-02-09 14:05, Ben Coleman via Ale wrote:

> If he uses ssh, it makes the connection ok.  If he uses putty or 
> filezilla (which is what he prefers to use), it fails with an 'invalid 
> user' message, but when I look at the server logs, the username looks 
> correct.
> 
> I presume that putty and filezilla have their own code for the ssh 
> protocol, rather than using the openssh libraries.  He needs something 
> like filezilla.
> 
> Any more ideas?

I'm still thinking it's out-dated ciphers in those apps.


Both Filezilla and Putty are in the Universe repo, so *not* curated by 
Canonical. Therefore there's a decent chance the latest cryptography 
hasn't been included.



Did you look into that at all?


> Some notes from my /etc/sshd_config.d/xxx.conf:
> 
> ## Use sshd -T to see which key, kex, hmac, cipher protocols are supported:
> ##  sshd -T |                                   \
> ##  grep -v gssapi |                        \
> ##  grep "\(ciphers\|macs\|kexalgorithms\)" \
> ##  | grep group
> 
> ## OLD version(s) of `ssh2dos`:
> ## https://github.com/AnttiTakala/SSH2DOS/
> KexAlgorithms=+diffie-hellman-group1-sha1
> HostkeyAlgorithms=+ssh-dss,ssh-rsa
> Ciphers=+aes128-cbc
> MACs=+hmac-sha1