Re: Cygwin and SSH

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From: Philip Le Riche <pleriche@altair.steria.co.uk>
To: samuelf_stefanini@ctbctelecom.net.br
Date: Mon, 9 Dec 2002 16:44:53 +0000 (GMT)

First, you need to set up an sshd_config. Best put it in /etc/openssh.
Here's one I made earlier:

# $OpenBSD: sshd_config,v 1.56 2002/06/20 23:37:12 markus Exp $

# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.

#Port 22
#Protocol 2,1
#ListenAddress 0.0.0.0
#ListenAddress ::

PidFile /var/openssh/sshd.pid

# HostKey for protocol version 1
HostKey /etc/openssh/ssh_host_key
# HostKeys for protocol version 2
HostKey /etc/openssh/ssh_host_rsa_key
HostKey /etc/openssh/ssh_host_dsa_key

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 3600
#ServerKeyBits 768

# Logging
#obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 600
#PermitRootLogin yes
#StrictModes yes

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys

# rhosts authentication should not be used
#RhostsAuthentication no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# For this to work you will also need host keys in /usr/local/etc/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no

# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no

# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes

#AFSTokenPassing no

# Kerberos TGT Passing only works with the AFS kaserver
#KerberosTgtPassing no

# Set this to 'yes' to enable PAM keyboard-interactive authentication
# Warning: enabling this may bypass the setting of 'PasswordAuthentication'
#PAMAuthenticationViaKbdInt yes

#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#KeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#Compression yes

#MaxStartups 10
# no default banner path
#Banner /some/path
#VerifyReverseMapping no

# override default of no subsystems
Subsystem sftp /usr/local/libexec/sftp-server

Then create some keys, e.g.

ssh-keygen -t rsa1 -f /etc/openssh/ssh_host_key -N ""
ssh-keygen -t dsa -f /etc/openssh/ssh_host_dsa_key -N ""
ssh-keygen -t rsa -f /etc/openssh/ssh_host_rsa_key -N ""

The following couple of lines I pinched from an rc.openssh on an AIX
machine:

read a b c d </etc/openssh/ssh_host_key.pub
echo $hostname $a $b $c >>/etc/openssh/ssh_known_hosts

On your client, create a user key, e.g.

ssh-keygen -t rsa -f $HOME/.ssh/id_rsa -N ""

Copy the public key $HOME/.ssh/id_rsa.pub to the cygwin server and
append to .ssh/authorized_keys

Start sshd with:

/usr/sbin/sshd -f /etc/openssh/sshd_config

Go back to your client machine and try:

ssh -l <user> <ip addr or hostname of server>

where <user> is what comes before the @ before each bash command
prompt.

Have I forgotten anything? You get the general idea.

The first time you get a remote bash prompt from a win9x box is magic!
Who wants a DOS prompt?

- Philip

samuelf_stefanini@ctbctelecom.net.br scrawls:
>
> Hello,
>
> How to configure CYGWIN to execute conections via SSH?
>
> Someone know
>
> Tanks
>
> Samuel
>
>
>
>
>

-- 
==============================================================================
Philip Le Riche                            Voice: +44 1442 884390
(Ouaithe qu'i' sait L'Riche, chu           Fax:   +44 1442 884943
pouôrre baloque né pâle pon l'Jèrriais)    Email: pleriche@altair.steria.co.uk
==============================================================================

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