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Date: Thu, 31 Mar 2022 16:18:39 +0300
From: Andrey Repin <anrdaemon AT yandex DOT ru>
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To: Greco Giovanni <Giovanni DOT Greco AT blueit DOT it>, cygwin AT cygwin DOT com
Subject: Re: SSH connection from Linux to Windows by CYGSSHD: port 22
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Greetings, Greco Giovanni!

> must port 22 on Windows server be enabled in a bidirectional way to
> establish a connection with RSA key exchange?
> I have a Linux server on a vlan and a Windows server on another vlan, those
> vlans are connected thru a firewall, where port 22 is enabled from Linux
> server to Windows server unidirectionally.
> Connection with user and password works, but not with RSA key exchange: is
> the problem located on port 22 unidirectional enabling?

No, it is most likely because you are connecting to Microsoft provided
OpenSSH.
`netstat -aon` and `ps ax` will tell you more.


-- 
With best regards,
Andrey Repin
Thursday, March 31, 2022 16:16:07

Sorry for my terrible english...


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