SSH fails to connect

I had a server that corrupted some files because of a bad power supply. It was being used for web/MySQL/PHP. After replacing the power supply I needed to replace the hostconfig file to get it back up and running. The server is back up and running, but fails to let anyone connect via SSH. The return error message "sshexchangeidentification: Connection closed by remote host" is less than helpful.
Google searches return information about Linux, and some information about SSH from Snailbook.com about editing the hosts.config file which doesn't exist in 10.4 server.
Any clues?

On Mon, 20 Aug 2007 14:03:08 -0400 Josh Wisenbaker Wrote in the MacEnterprise Listserv:
Have you connected with ssh -vvv from a client to see what is going on
at a step by step level?
Josh,
Thanks for the pointer. That caused me to look closer. I was seeing this on the debug.
OpenSSH_4.5p1, OpenSSL 0.9.7l 28 Sep 2006
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to someserver.somesubdomain.psu.edu [XXX.XXX.XXX.XXX] port 22.
debug1: Connection established.
debug1: identity file /Users/rak7/.ssh/identity type -1
debug1: identity file /Users/rak7/.ssh/id_rsa type -1
debug1: identity file /Users/rak7/.ssh/id_dsa type -1
sshexchangeidentification: Connection closed by remote host
I started looking at the ssh_config file to see if there was a line for needpriv that I could edit, but found none. Then I noticed by looking at the same file on a known good server that it was identical. While I was comparing I also looked at the sshd_config file on the known good server. I found that file missing on the machine with the sshexchangeidentification error, replaced it with the .bak file restarted and that solved the problem.
What got me here is that in the debug or the original login there was no indication that sshd was not running, just that it was rejecting connections.
I should have known better, the original problem with the bad server was corruption/deleting of files during a intermittent power supply failure. I forgot to look at the whole /etc/ directory to make sure the right service configuration files were in it.
Thanks
-rich

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SSH - Failure to connect, does not prompt for password,

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I can still connect to other systems on the internet that are not through the VPN.
I don't suspect this to be a VPN issue because no other employees are having this problem with the VPN, using Mac, Windows or Linux. I can connect vi putty on my windows from the same network... below is my config.
Here is what I'm getting:
I connect as- ssh me@hostname and it returns "Permission denied (publickey)." It makes to attempt to prompt me for a password. I do not use a key on this system so it should prompt me for a password. I changed nothing on the system to cause ssh to break, But it's possible that a apple security update caused something to break.
I have added the following to my ~/.ssh/config file
PasswordAuthentication yes
My /etc/ssh_config file is as follows:
cat /etc/ssh_config
# $OpenBSD: ssh_config,v 1.22 2006/05/29 12:56:33 dtucker 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 some commonly used options. For a comprehensive
# list of available options, their meanings and defaults, please see the
# ssh_config(5) man page.
# Host *
# ForwardAgent no
# ForwardX11 no
# RhostsRSAAuthentication no
# RSAAuthentication yes
PasswordAuthentication yes
# HostbasedAuthentication no
# GSSAPIAuthentication no
# GSSAPIDelegateCredentials no
# GSSAPIKeyExchange no
# GSSAPITrustDNS no
# BatchMode no
# CheckHostIP yes
# AddressFamily any
# ConnectTimeout 0
# StrictHostKeyChecking ask
# 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 ~
# Tunnel no
# TunnelDevice any:any
PermitLocalCommand yes
My /etc/sshd_config is:
cat /etc/sshd_config
# $OpenBSD: sshd_config,v 1.72 2005/07/25 11:59:40 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
# 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
Protocol 2
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
# HostKey for protocol version 1
#HostKey /etc/sshhostkey
# HostKeys for protocol version 2
#HostKey /etc/sshhost_rsakey
#HostKey /etc/sshhost_dsakey
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768
# Logging
# obsoletes QuietMode and FascistLogging
SyslogFacility AUTHPRIV
#LogLevel INFO
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
PermitRootLogin no
#StrictModes yes
#MaxAuthTries 6
#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
# For this to work you will also need host keys in /etc/sshknownhosts
#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
# SACL options
#SACLSupport yes
# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
# GSSAPI options
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange yes
# GSSAPI options
#GSSAPIAuthentication yes
#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 yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
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#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
#PermitTunnel no
# no default banner path
#Banner /some/path
# override default of no subsystems
Subsystem sftp /usr/libexec/sftp-server
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Also I forgot to mention, I have nulled out the known_hosts file to eliminate any conflicts there, I have verified .ssh is 700 and files config and known_hosts are 600
output using ssh -v
debug1: Reading configuration data /Users/<me>/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to pshx4105a [216.255.177.213] port 22.
debug1: Connection established.
debug1: identity file /Users/<me>/.ssh/identity type -1
debug1: identity file /Users/<me>/.ssh/id_rsa type -1
debug1: identity file /Users/<me>/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.5p1 FreeBSD-20061110
debug1: match: OpenSSH_4.5p1 FreeBSD-20061110 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.7
debug1: SSH2MSGKEXINIT sent
debug1: SSH2MSGKEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2MSG_KEX_DH_GEXREQUEST(1024<1024<8192) sent
debug1: expecting SSH2MSG_KEX_DH_GEXGROUP
debug1: SSH2MSG_KEX_DH_GEXINIT sent
debug1: expecting SSH2MSG_KEX_DH_GEXREPLY
debug1: Host 'pshx4105a' is known and matches the DSA host key.
debug1: Found key in /Users/<me>/.ssh/known_hosts:3
debug1: sshdssverify: signature correct
debug1: SSH2MSGNEWKEYS sent
debug1: expecting SSH2MSGNEWKEYS
debug1: SSH2MSGNEWKEYS received
debug1: SSH2MSG_SERVICEREQUEST sent
debug1: SSH2MSG_SERVICEACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/<me>/.ssh/identity
debug1: Trying private key: /Users/<me>/.ssh/id_rsa
debug1: Trying private key: /Users/<me>/.ssh/id_dsa
debug1: No more authentication methods to try.

Ssh fails with rule matching LAN

My goal is simple: use a key pair from the WAN only but allow password auth from the LAN.
I thought my recipe had previously worked in Arch and other distros, but now I'm unsure. Here's a snippet of some relevant sections of /etc/ssh/sshd_config:
RSAAuthentication yes
PubkeyAuthentication yes
PasswordAuthentication no
ChallengeResponseAuthentication no
UsePAM yes
Match Address 192.168.1.0/24
PasswordAuthentication yes
Without the match section I'm able to login. With the match section I am not able to login from WAN or LAN hosts.
Here's an excerpt from the ssh client logging in from the localmachine itself along with a tail of the journal (using the match address section):
CLIENT SIDE
myhost% ssh -v localhost
OpenSSH_6.4, OpenSSL 1.0.1f 6 Jan 2014
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debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to localhost [::1] port 22.
debug1: Connection established.
debug1: identity file /home/myuser/.ssh/id_rsa type 1
debug1: identity file /home/myuser/.ssh/id_rsa-cert type -1
debug1: identity file /home/myuser/.ssh/id_dsa type -1
debug1: identity file /home/myuser/.ssh/id_dsa-cert type -1
debug1: identity file /home/myuser/.ssh/id_ecdsa type 3
debug1: identity file /home/myuser/.ssh/id_ecdsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.4
debug1: match: OpenSSH_6.4 pat OpenSSH*
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr [email protected] none
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA <ommited pub>
debug1: Host 'localhost' is known and matches the ECDSA host key.
debug1: Found key in /home/myuser/.ssh/known_hosts:6
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/myuser/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/myuser/.ssh/id_dsa
debug1: Offering ECDSA public key: /home/myuser/.ssh/id_ecdsa
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
SERVER SIDE
myhost% sudo journalctl -f --full
-- Logs begin at Sat 2013-06-29 11:25:32 EDT. --
Jan 07 13:09:18 myhost systemd[1]: Started SSH Key Generation.
Jan 07 13:09:18 myhost systemd[1]: Starting OpenSSH Daemon...
Jan 07 13:09:18 myhost systemd[1]: Started OpenSSH Daemon.
Jan 07 13:09:18 myhost sudo[20291]: pam_unix(sudo:session): session closed for user root
Jan 07 13:09:18 myhost sshd[20295]: Server listening on 0.0.0.0 port 22.
Jan 07 13:09:18 myhost sshd[20295]: Server listening on :: port 22.
Jan 07 13:09:23 myhost sshd[20296]: reverse mapping checking getaddrinfo for <omitted address> [<omitted address>] failed - POSSIBLE BREAK-IN ATTEMPT!
Jan 07 13:09:34 myhost sshd[20296]: error: Received disconnect from <omitted address>: 13: Unable to authenticate [preauth]
Jan 07 13:09:39 myhost sudo[20298]: myuser : TTY=pts/2 ; PWD=/home/myuser ; USER=root ; COMMAND=/usr/bin/journalctl -f --full
Jan 07 13:09:39 myhost sudo[20298]: pam_unix(sudo:session): session opened for user root by myuser(uid=0)
Jan 07 13:10:35 myhost sshd[20308]: Connection closed by ::1 [preauth]
Last edited by badhat (2014-01-08 14:36:10)

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Just check if the receive connector settings are set to fine
check the send connector properties and see whether it is set to use DNS to route emails through external DNS/Internal DNS or smart host .
Do a telnet to external domain like hotmail,yahoo and see at what transaction you are getting an error
Enable verbose logging, restart the transport service and check if you get the same error in the verbose logs as well
Get in touch with the ISP and see if the port 25 for Outbound SMTP is opened.
YOu can check if SMTP Proxy is enabled in the firewall. If so disable the SMTP proxy in the firewall and check.
Good Luck!!
Please mark as helpful if you find my contribution useful or as an answer if it does answer your question.
That will encourage me - and others - to take time out to help you.
Regards,
Sathish

Device Manager HP Printer ! Symbol, Windows "failed to connect" Sound- Yet Printer Works

Every startup, I hear the Windows "device failed to connect" sound. How can I get rid of this?
I have an HP J6480 Printer with WIn 7. Device Manager is not recognizing the printer driver.
Under Device Manager, the printer is listed with the ! error symbol. No other devices have an error symbol. Yet the HP Solution Center and printer work.
1) I have tried fresh installs of the current HP Full Feature Software.
2) I have tried the HP Uninstall program, going through all five Uninstall programs two times.
3) I have run CCleaner to clear registry issues.
4) I have tried deleting the Device Manager "Officejet ! J6400 series" entry. The Solution Center and the printer then do not work. Apparently, Device Manager recognizes the printer but not the driver. I have to go to "Programs", "HP", then "Officejet J6400 Series" to reinstall the software.
5) I have tried to get Device Manager to recognize the software. When I click on "! Officejet 6400 series", I get the message "the drivers for this device are not installed (code 28)". If I then click on "Update Driver" and select" Browse my computer for driver software" then click on "Browse "C:\Users\Myname\Downloads", where I have both the HP 13.0 Full Feature Sofware Software and the Basic Print and Scan Driver files, it says "Windows cannot find driver software". If i click on "Search automatically for driver software" I get the same message.
I would very much appreciate any ideas! Thank you!
This question was solved.
View Solution.

Friendlycomputr,
Your persistence is admirable! I totally understand you just want it working properly. I really appreciate the updates, I am going to look into this and get back to you as soon as I can!
Thanks again
HevnLgh
I work on behalf of HP
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" to the left of the reply button to say “Thanks” for helping!

Lumia 620 fails to connect to car bluetooth - coll...

My lumia 620 did initially connect to my ford focus car audi/phone successfully. However after about a week it failed to connect and I haven't been able to connect since. Defeats the object of hands-free!
Steps taken (which work with previous phones of various makes/models):
Turn bluetooth on in car
Turn on phone bluetooth connectivity
Car display finds my phone successfully and provides a PIN to enter in the phone
Phone bluetooth status says 'unable to connect to ford audio system' and times-out.
I've noticed that the 'tap to pair' message doesn't appear as it previously did and I can't find anywhere else to look for bluetooth settings.
A colleague who has an identical phone can successfully connect - it does show the 'tap to pair' message.
I have updated the ford audio system software and checked the other phone connects ok. I have also tried removing the phone battery several times but still no joy.
Help please - thanks

Hi Roshanrims,
Thank you for reaching out to us. Let's go with the connectivity issue first. Are you getting the same issue when you connect your phone to another PC? To further isolate the issue, you can try other troubleshooting steps found on the below link:
• The cable connection to my computer does not work
Note: The link is intended for the Philippines. Let us know your location so we can give you the correct link.
As for the Project My Screen, see this: Project my phone screen to a TV or PC.
We look forward to your reply.

My HP Photosmart Premium C309g-m failed to connect wirelessly to my router

When setting up my printer to connect to my wireless router, the printer can see the network Name (SSID) but failed to connect to it using WEP password. The Wireless Network Report shows the printer Authentication Type is "Open System" while my router is configured as "Shared". How do I change the Authentication Type on my printer to match the Router? Thank you.

WEP is not at all secure. It can be broken in about 10 minutes with freeware. It is also known to cause printer connection issues.
Change to WPA or WPA2 with a 13+ character passphrase consisting of numbers, letters, upper and lower case.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

SSH fails to connect

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