OpenSSH Authentication on Solaris w/ NIS+ Problem

Mon Oct 6 06:12:17 EST 2003

Hello,

   I am having a very aggrivating problem, and I will try and provide all of the necessary information.  I have openssh-3.7.1p2 with openssl-0.9.6k installed on Solaris 8.  Here is what I've been able to determine so far:

1. Local account authentication works fine (non-NIS+).
1a. NIS+ is running at security level 2
2. Telnet authentication works fine.
2a. When I use the SSH client, from another UNIX machine, it works fine -- only windows SSH clients (I've tried SecureCRT and SSH.com's SSH client) have problems connecting.
3. nscd is not running (I stopped it for now, but I don't think it matters)
3a. PAM is enabled in my sshd_config (see below)
4. When I log in via telnet (for example), it works; and then I try that same ID that wouldn't work originally via SSH, it then works!
5. When I log in to master server via SSH it works fine (it only doesn't work when I try to log into client servers).
6. When I try keyboard interactive authentication (instead of Password), it works, but it asks me TWICE for the login info (the first time fails, the second time succeeds).

TO SUMMARIZE: I have problems WHEN: I log in via SSH to the non-master NIS+ server with a non-local account (NIS+ account) with a Windows client via 'Password' authentication.  I'd love to see someone figure THIS ONE out...

Here's my ./configure for openssh:

----------------------------------------------------------------------
configured by ./configure, generated by GNU Autoconf 2.52,
  with options \"--prefix=/usr/openssh --with-pam --without-rsh --with-pid-dir=/var/run --with-md5-passwords --with-ssl-dir=/usr/local/ssl --with-mantype=man\"
----------------------------------------------------------------------

Here is my sshd.conf file:

----------------------------------------------------------------------
Port 22
Protocol 2
#ListenAddress 0.0.0.0
#ListenAddress ::

# HostKey for protocol version 1
HostKey /usr/openssh/etc/ssh_host_key
# HostKeys for protocol version 2
HostKey /usr/openssh/etc/ssh_host_rsa_key
HostKey /usr/openssh/etc/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 no
#StrictModes yes

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

# For this to work you will also need host keys in /usr/openssh/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
# 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

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCreds yes

# Set this to 'yes' to enable PAM authentication (via challenge-response)
# and session processing. Depending on your PAM configuration, this may
# bypass the setting of 'PasswordAuthentication'
UsePAM yes

#AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
PrintMotd yes
#PrintLastLog yes
KeepAlive yes
#UseLogin no
UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression yes
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
PidFile /var/run/sshd.pid
#MaxStartups 10
# no default banner path
#Banner /some/path
# override default of no subsystems
Subsystem       sftp    /usr/openssh/libexec/sftp-server
----------------------------------------------------------------------

Here is what it looks like when I use a Windows SSH client (with IP addresses changed to protect the innocent):

bash-2.03# /usr/openssh/sbin/sshd -d -d -d
debug3: Seeding PRNG from /usr/openssh/libexec/ssh-rand-helper
debug2: read_server_config: filename /usr/openssh/etc/sshd_config
debug1: sshd version OpenSSH_3.7.1p2
debug1: private host key: #0 type 0 RSA1
debug3: Not a RSA1 key file /usr/openssh/etc/ssh_host_rsa_key.
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug3: Not a RSA1 key file /usr/openssh/etc/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Server will not fork when running in debugging mode.
Connection from 10.0.0.1 port 1583
debug1: Client protocol version 2.0; client software version 3.4.5 SecureCRT
debug1: no match: 3.4.5 SecureCRT
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.7.1p2
debug3: privsep user:group 1002:1002
debug1: permanently_set_uid: 1002/1002
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc at lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc at lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-dss,ssh-rsa
debug2: kex_parse_kexinit: aes128-cbc,aes192-cbc,aes256-cbc,twofish-cbc,blowfish-cbc,3des-cbc,arcfour
debug2: kex_parse_kexinit: aes128-cbc,aes192-cbc,aes256-cbc,twofish-cbc,blowfish-cbc,3des-cbc,arcfour
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: Network child is on pid 801
debug3: preauth child monitor started
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug3: mm_request_send entering: type 0
debug3: mm_choose_dh: waiting for MONITOR_ANS_MODULI
debug3: mm_request_receive_expect entering: type 1
debug3: mm_request_receive entering
debug3: monitor_read: checking request 0
debug3: mm_answer_moduli: got parameters: 1024 2046 2046
debug3: mm_request_send entering: type 1
debug3: mm_choose_dh: remaining 0
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug2: monitor_read: 0 used once, disabling now
debug3: mm_request_receive entering
debug2: dh_gen_key: priv key bits set: 133/256
debug2: bits set: 786/1535
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug2: bits set: 780/1535
debug3: mm_key_sign entering
debug3: mm_request_send entering: type 4
debug3: monitor_read: checking request 4
debug3: mm_answer_sign
debug3: mm_answer_sign: signature 12b3c0(55)
debug3: mm_request_send entering: type 5
debug2: monitor_read: 4 used once, disabling now
debug3: mm_request_receive entering
debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN
debug3: mm_request_receive_expect entering: type 5
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user student service ssh-connection method none
debug1: attempt 0 failures 0
debug3: mm_getpwnamallow entering
debug3: mm_request_send entering: type 6
debug3: monitor_read: checking request 6
debug3: mm_answer_pwnamallow
debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM
debug3: mm_request_receive_expect entering: type 7
debug3: mm_request_receive entering
debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
debug3: mm_request_send entering: type 7
debug2: monitor_read: 6 used once, disabling now
debug3: mm_request_receive entering
debug2: input_userauth_request: setting up authctxt for student
debug3: mm_start_pam entering
debug3: mm_request_send entering: type 43
debug3: monitor_read: checking request 43
debug1: PAM: initializing for "student"
debug3: mm_inform_authserv entering
debug3: Trying to reverse map address 10.0.0.1.
debug3: mm_request_send entering: type 3
debug2: input_userauth_request: try method none
debug3: mm_auth_password entering
debug3: mm_request_send entering: type 10
debug3: mm_auth_password: waiting for MONITOR_ANS_AUTHPASSWORD
debug3: mm_request_receive_expect entering: type 11
debug3: mm_request_receive entering
debug1: PAM: setting PAM_RHOST to "10.0.0.1-my.host.com"
debug1: PAM: setting PAM_TTY to "ssh"
debug2: monitor_read: 43 used once, disabling now
debug3: mm_request_receive entering
debug3: monitor_read: checking request 3
debug3: mm_answer_authserv: service=ssh-connection, style=
debug2: monitor_read: 3 used once, disabling now
debug3: mm_request_receive entering
debug3: monitor_read: checking request 10
debug3: mm_answer_authpassword: sending result 0
debug3: mm_request_send entering: type 11
Failed none for student from 10.0.0.1 port 1583 ssh2
debug3: mm_request_receive entering
debug3: mm_auth_password: user not authenticated
Failed none for student from 10.0.0.1 port 1583 ssh2
debug1: userauth-request for user student service ssh-connection method password
debug1: attempt 1 failures 1
debug2: input_userauth_request: try method password
debug3: mm_auth_password entering
debug3: mm_request_send entering: type 10
debug3: monitor_read: checking request 10
debug3: mm_auth_password: waiting for MONITOR_ANS_AUTHPASSWORD
debug3: mm_answer_authpassword: sending result 0
debug3: mm_request_send entering: type 11
Failed password for student from 10.0.0.1 port 1583 ssh2
debug3: mm_request_receive entering
debug3: mm_request_receive_expect entering: type 11
debug3: mm_request_receive entering
debug3: mm_auth_password: user not authenticated
Failed password for student from 10.0.0.1 port 1583 ssh2

Thanks.