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Old 02-16-2005, 12:57 AM   #1
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Registered: Aug 2003
Location: Portland, Oregon
Distribution: Gentoo
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ssh keys

I have 2 systems I wish to use ssh on from one another using keys so I will not need to enter a password.

I have done this several times with no issues.

I am not a newb no need to water it or baby it down at all


After setting up the keys I can ssh from compA to compB, but it requires the password. From compB trying to reach compA it immediately closes the connection.

Tried removing the keys and it works fine, but requires passwords (duh)

everything in .ssh is chmod 600 on both systems

both systems have the same public and private keys for dsa, rsa, and identity
both have the proper authorized_keys file with the publix key for each of the above inside it.

the keys work fine when connecting to a 3'rd remote computer with the exact same authorized_keys file, by work I mean ssh connects and does not prompt for a password

both comps have exact copies of .ssh/ under same username

both can connect to the third comp (I have no control of system and cannot upload my private keys to test it connecting to A and B)

both have same config files and ssh versions:

#	$OpenBSD: ssh_config,v 1.19 2003/08/13 08:46:31 markus Exp $

# This is the ssh client system-wide configuration file.  See
# ssh_config(5) for more information.  This file provides defaults for
# users, and the values can be changed in per-user configuration files
# or on the command line.

# Configuration data is parsed as follows:
#  1. command line options
#  2. user-specific file
#  3. system-wide file
# Any configuration value is only changed the first time it is set.
# Thus, host-specific definitions should be at the beginning of the
# configuration file, and defaults at the end.

# Site-wide defaults for various options

# Host *
#   ForwardAgent no
   ForwardX11 yes
   RhostsRSAAuthentication yes
   RSAAuthentication yes
   PasswordAuthentication yes
#   HostbasedAuthentication no
#   BatchMode no
#   CheckHostIP yes
#   AddressFamily any
#   ConnectTimeout 0
   StrictHostKeyChecking no
   IdentityFile ~/.ssh/identity
   IdentityFile ~/.ssh/id_rsa
   IdentityFile ~/.ssh/id_dsa
#   Port 22
#   Protocol 2,1
#   Cipher 3des
#   Ciphers aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
#   EscapeChar ~
#	$OpenBSD: sshd_config,v 1.69 2004/05/23 23:59:53 dtucker 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

# 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
#ListenAddress ::

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

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

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

# Authentication:

#LoginGraceTime 2m
PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile	.ssh/authorized_keys

# For this to work you will also need host keys in /etc/ssh/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
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# 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
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

# Set this to 'yes' to enable PAM authentication, account processing, 
# and session processing. If this is enabled, PAM authentication will 
# be allowed through the ChallengeResponseAuthentication mechanism. 
# Depending on your PAM configuration, this may bypass the setting of 
# PasswordAuthentication, PermitEmptyPasswords, and 
# "PermitRootLogin without-password". If you just want the PAM account and 
# session checks to run without PAM authentication, then enable this but set 
# ChallengeResponseAuthentication=no
#UsePAM no

AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression yes
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/
#MaxStartups 10

# no default banner path
#Banner /some/path

# override default of no subsystems
Subsystem	sftp	/usr/lib/misc/sftp-server
as far as I remember having set it up several times before everything is correct.

Any help would be appreciated.
Old 02-16-2005, 01:13 AM   #2
Registered: Aug 2004
Location: .au
Distribution: debian, BSD
Posts: 104

Rep: Reputation: 16
I thought it may be a versioning problem with the cypher type you're using to generate the key, but you're using the same version, so I dunno. you could run up sshd on both ends in very verbose debug mode. It should give you some clues as to why its rejecting the empty passphrase. have you tried that yet?
Old 02-16-2005, 08:47 AM   #3
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Location: Portland, Oregon
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Original Poster
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I have not tried that, I will though
Old 02-16-2005, 10:16 AM   #4
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Location: Portland, Oregon
Distribution: Gentoo
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it shows that ssh (even after recompile) segfaults as soon as a connection is attempted.


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