Re: Granting access to OpenBSD

On Tue, Jan 20, 2026 at 5:19 PM Brian Conway <bconway@rcesoftware.com> wrote:

On Tue, Jan 20, 2026, at 8:04 AM, Washington Odhiambo wrote:
> On Tue, Jan 20, 2026 at 2:36 PM All <olp_76@yahoo.ca> wrote:
>> So it seems its your client that is giving you issues. Probably Key Exchange algorithms is the culprit?
>> Or some other misconfig.
>
> The two SSH clients work with almost everything in the work, EXCEPT
> OpenBSD? :-(
> I haven't configured anything on the OpenBSD VM. I started with getting
> SSH access to work, hence my issues with PF.
> But after disabling PF, I expected SSH access to work. And it doesn't.
> And that ends my sojourn to the OpenBSD land --for now.
>

If your client is incompatible or out of date, you will likely see the same behavior the next time any of the other operating systems you are using put out a new release that includes the latest OpenSSH. I suspect they probably aren't using 10.2 right now.

If you search the release notes for "incompatible", you might find a clue as to what is broken in your version of PuTTY:

https://www.openssh.org/releasenotes.html

Or try updating PuTTY first, if you haven't already.

Putty version = 0.83

OpenSSH version on my FreeBSD 15-REL VM = OpenSSH_10.0p2, OpenSSL 3.5.4 30 Sep 2025

OpenSSH version on the OpenBSD-7.8 VM = OpenSSH_10.2, LibreSSL 4.2.0

In most of my Linux VM = OpenSSH_10.2

Putty/Bitvise SSH clients work with all VMs, and all hosts that I manage, but NOT OpenBSD.

Any ideas?

--

Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223

 In an Internet failure case, the #1 suspect is a constant: DNS.
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