>From my untrained eye seems to be a KEX incompatibility. Can you try moving the curve25519 implementation above the NTRU Prime (sntrup761x25519*) ones on your Putty client and attempting the connection once more?
On Tue, Jan 20, 2026 at 06:22:06PM +0300, Washington Odhiambo wrote: > On Tue, Jan 20, 2026 at 6:08 PM Crystal Kolipe <[email protected]> > wrote: > > > On Tue, Jan 20, 2026 at 05:41:13PM +0300, Washington Odhiambo wrote: > > > Putty/Bitvise SSH clients work with all VMs, and all hosts that I manage, > > > but NOT OpenBSD. > > > > > > Any ideas? > > > > Run sshd on the OpenBSD machine in the foreground from the console to see > > comprehensive debugging info: > > > > # /etc/rc.d/sshd stop > > # /usr/sbin/sshd -ddd > > > > This will generate a lot of output, but will allow you to see how the ssh > > session is being negotiated, (and hopefully identify where it fails). > > > > Here is the debug info: https://paste.ubuntu.com/p/CXP2qNWWTX/ > > > > -- > 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. > "Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-) > [How to ask smart questions: > http://www.catb.org/~esr/faqs/smart-questions.html] -- All desire is the desire to be desired by the subject presumed to know.
