Cygwin SSHD 32bit

Cygwin SSHD 32bit

[Marcel Grandemange]

Good Day

I would really appreciate it if someone can assist me.

I have a Windows server 2003 server with the latest Cygwin installed.

CYGWIN_NT-5.2  2.5.2(0.297/5/3) 2016-06-23 14:27 i686 Cygwin

I have setup the SSH service as I have many a time before on other
servers. The service successfully starts however I cannot SSH into the
machine and am presented with the following error:

ssh_exchange_identification: read: Connection reset by peer

Note that I have allowed it through the firewall and this error is even
present on the machine itself

$ ssh -vvvv localhost
OpenSSH_7.3p1, OpenSSL 1.0.2h  3 May 2016
debug1: Reading configuration data /etc/ssh_config
debug2: resolving "localhost" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/Marcel/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/Marcel/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.3
ssh_exchange_identification: read: Connection reset by peer


There are no hosts.allow or hosts.deny files present on this machine and
Cygwin has been reinstalled several times under different users to test
permission theories I had.

When I change the permission of the /var/empty folder to my current user
to allow me to run the sshd Daemon as my current user I see the following:

$ /usr/sbin/sshd -ddddd
debug2: load_server_config: filename /etc/sshd_config
debug2: load_server_config: done config len = 288
debug2: parse_server_config: config /etc/sshd_config len 288
debug3: /etc/sshd_config:19 setting Protocol 2
debug3: /etc/sshd_config:43 setting PermitRootLogin yes
debug3: /etc/sshd_config:53 setting AuthorizedKeysFile
.ssh/authorized_keys
debug3: /etc/sshd_config:79 setting KerberosOrLocalPasswd yes
debug3: /etc/sshd_config:109 setting UsePrivilegeSeparation yes
debug3: /etc/sshd_config:125 setting Subsystem sftp    
/usr/sbin/sftp-server
debug1: sshd version OpenSSH_7.3, OpenSSL 1.0.2h  3 May 2016
debug1: private host key #0: ssh-rsa
SHA256:eH6f4o7GOW6xajSHXQywMtsWmocl4PzgNy6o1Dmbxoc
debug1: private host key #1: ssh-dss
SHA256:pZxX5Ddzn6mR5sOlRPjNV3mtXgJTSpZjkSgpySz0wsI
debug1: private host key #2: ecdsa-sha2-nistp256
SHA256:dyTs9OY0gaXfEv09jx3DZYlgEUjBQKKGkQJ/ioTG2qQ
debug1: private host key #3: ssh-ed25519
SHA256:KeIpfsnyBDf2V7OH9BFjx8xmhh/HwqJ2QUOyUPy6hsM
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-ddddd'
debug2: fd 3 setting O_NONBLOCK
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: fd 4 clearing O_NONBLOCK
debug1: Server will not fork when running in debugging mode.
debug3: send_rexec_state: entering fd = 7 config len 288
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7
debug1: inetd sockets after dupping: 3, 3

It seems that the SSH daemon never gets to the “SSH2_MSG_KEXINIT sent”
stage.

I have attempted numerous modifications of the setup and daemon config,
eventually just to confirm all networking aspects are correct I installed
bitvise ssh server and this worked, however I really need to get Cygwin
working correctly. I have also tried changing the default port to 2200 but
all yield same result.

Any Ideas?

Kind Regards
Marcel Grandemange
OPS Manager
Antfarm (PTY) Ltd
Tel: 012 346 7511
Direct : 0100072640

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Re: Cygwin SSHD 32bit

[Erik Soderquist]

On Tue, Aug 23, 2016 at 12:24 PM, Marcel Grandemange  wrote:
> Good Day
>
> I would really appreciate it if someone can assist me.
>
> I have a Windows server 2003 server with the latest Cygwin installed.
>
> CYGWIN_NT-5.2  2.5.2(0.297/5/3) 2016-06-23 14:27 i686 Cygwin
>
> I have setup the SSH service as I have many a time before on other
> servers. The service successfully starts however I cannot SSH into the
> machine and am presented with the following error:
>
> ssh_exchange_identification: read: Connection reset by peer
>
> Note that I have allowed it through the firewall and this error is even
> present on the machine itself

I had this error on a Windows Home Server v1 (server 2003 SB base) and
the only way I was able to resolve it was to disable the Microsoft
firewall on the host and use an external firewall.  It seems to be a
problem with the Microsoft firewall in my experience.  I had tried
both opening tcp/22 and the executable (either/or as well as together)
to no avail.

-- Erik

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RE: Cygwin SSHD 32bit

[Marcel Grandemange]

I have entirely disabled the firewall at one point and this didn't help. 
Also keep in mind I did install bitvise ssh server to do a comparison and 
this worked.

I would also like to add to this I also went through the effort of removing 
the SSH packages from Cygwin and built from source OpenSSH as well at one 
point which also I might add , had ther exact same issues.


-----Original Message-----
From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com] On Behalf Of 
Erik Soderquist
Sent: Tuesday, August 23, 2016 6:35 PM
To: cygwin@cygwin.com
Subject: Re: Cygwin SSHD 32bit

On Tue, Aug 23, 2016 at 12:24 PM, Marcel Grandemange  wrote:
> Good Day
>
> I would really appreciate it if someone can assist me.
>
> I have a Windows server 2003 server with the latest Cygwin installed.
>
> CYGWIN_NT-5.2  2.5.2(0.297/5/3) 2016-06-23 14:27 i686 Cygwin
>
> I have setup the SSH service as I have many a time before on other
> servers. The service successfully starts however I cannot SSH into the
> machine and am presented with the following error:
>
> ssh_exchange_identification: read: Connection reset by peer
>
> Note that I have allowed it through the firewall and this error is
> even present on the machine itself

I had this error on a Windows Home Server v1 (server 2003 SB base) and the 
only way I was able to resolve it was to disable the Microsoft firewall on 
the host and use an external firewall.  It seems to be a problem with the 
Microsoft firewall in my experience.  I had tried both opening tcp/22 and 
the executable (either/or as well as together) to no avail.

-- Erik

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Re: Cygwin SSHD 32bit

[Erik Soderquist]

On Tue, Aug 23, 2016 at 12:43 PM, Marcel Grandemange wrote:
> I have entirely disabled the firewall at one point and this didn't help.
> Also keep in mind I did install bitvise ssh server to do a comparison and
> this worked.

Then I don't know, though I will be watching this thread for a
possible solution to my issue as well.

Also, please do not top post

-- Erik

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