Ubuntu Networking :: NoMachine NX Public Key Authentication Failed
Dec 20, 2010
I'm trying to restrict command line ssh and yet keep NoMachine working, so I followed this post [URL]... and tried adding this to /etc/ssh/sshd_config:
AllowUsers nx@*.*.*.* paul@*.*.*.* *@::ffff:127.0.0.1 *@127.0.0.1
On restarting the ssh daemon other users can't login by the terminal, but I can. However, NoMachine won't log me in. I get: NX> 502 ERROR: Public key authentication failed. As a server side check:
[code]...
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Jul 12, 2011
I want to use nomachine, instead of freenx, and well it isn't working. SSH server works and all, because freenx works., same for neatx. But I hear with nomachine you can see the main display of the computer? Is this true? Well one way to find out, but whenever I try to login I get: Authentication failed for user x. I don't know why, neatx and freenx worked, even x2go, but not this.
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Feb 6, 2010
I'm trying to connect to my Xubuntu box (zelda) remotely using my RSA key. I'm using Cygwin on my Windows box (link) to SSH in to the Xubuntu box. I've created the key and placed it in the authorized_keys file on my remote box. Here's where it gets weird. When I ssh into zelda the first time, it prompts me for my password. However, if I'm already connected to zelda and try to open another connection, it prompts me for my RSA passphrase. This is very confusing, and I have no idea what's going on.Here's my sshd_config file on zelda.
Code:
# Package generated configuration file
# See the sshd(8) manpage for details
[code]...
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Jan 6, 2010
I have an ssh (OpenSSH_5.1p1 Debian-6ubuntu2) client A and a server B set up for public key authentication as described in [URL]
The problem is the following: ssh asks for a password when connecting from A to B without any other ssh session going on between A and B; but if I connect from A to B whenever there is another ssh session between A and B, either I get prompted for the passphrase I used to encrypt the private key or I get logged automatically.
I already checked permissions on B: .ssh is 700 and authorized_keys is 600. I already tried "StrictModes no" in sshd_config. Printing debug information using DEBUG3 does not any useful insight. Moreover, there is no /var/log/secure (is it supposed to be there?)
Right now the computer is far far away from my reach, but when I configured the system I noted that whenever I was locally logged to B and then ssh'ed from A to B, I was logged in without any problem; whenever I was not logged in locally I was asked for a password. Note that at that time I was using a different public/private key pair whose private part had no passphrase.
how to know exactly what cipher is ssh/sshd using for a particular session? Is there a way to know any statistics for a given session (something like the ~s option in section 5 of [URL]
P.S. 2: does the following mean that ssh is using protocol 2.0 or something different than protocol 2.0?
(..........) sshd[2606]: debug1: Enabling compatibility mode for protocol 2.0
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May 22, 2010
I'm trying to get OpenSSH public key authentication to work. My server runs ubuntu. My client is a windows machine, and I'm using cygwin. I tried using the instructions here: [URL]... If I test it out using this line: ssh -v -v -v -o PreferredAuthentications=publickey server.example.org
I get this:
debug3: no such identity: /home/Julie/.ssh/identity
debug1: Offering public key: /home/Julie/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug3: Wrote 368 bytes for a total of 1477
[Code]...
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May 7, 2010
After years with Linux and using ssh on a daily basis I have to admit I've never setup public/private key authentication and I've never run passwordless logon to ssh. It's not that I've never tried, I have - I've just never got it working. That to me is an almost alien concept as I am a tinkerer at heart and rarely stop until something is working the way I'd like it to. I get the principle of what's going on but I've always had a mental block about it.
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Apr 10, 2010
After 72 hours googling for this I found nothing. I have problem with pppoe on ubuntu 9.10.
On fresh installed ubuntu i tried to establish pppoe connection with this command:
Code:
This (pppoe) doesn't work from the live cd
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May 21, 2010
I have been used NX client on windows 7 connected to ubuntu with NX client/node/server with no issues. The matter started when I have formatted Ubuntu and reinstalled NX, from that NX connects but shows a key error as follows:
NX> 203 NXSSH running with pid: 4328
NX> 285 Enabling check on switch command
NX> 285 Enabling skip of SSH config files
[code]....
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Apr 1, 2016
If I am running a script, let's say a install script. Is there a way to make Su repeat authentication rather then just returning "Authentication failed" and continuing the script?
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Jun 25, 2011
I'd like to ask one simple question I can't figure out how to solve.I've set up my public key authentication by generating the public key on my Windows box. Copied that into /root/.ssh/authorized_keysDisabled password authentication in /etc/ssh/sshd_config:
#Port 22
#Protocol 2,1
Protocol 2
[code]...
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Jan 20, 2010
I want to setup SSH with DSA public key authentication between two servers
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Jan 3, 2011
I often run into this and it's such a hassle that I have had no choice but to ignore it. But, I would like to run it properly but I don't understand why my sources list is 'wrong' or has incorrect info so that it's often not verified or authenticated. The public keyring is wrong or the source or both? I get these messages, for e.g.:
# apt-get update && apt-get install dmo-archive-keyring && apt-get update exit with result:
W: GPG error: http://unofficial.debian-maintainers.org squeeze Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9EEBC8DB9B9C3CB6
I probably don't need that but I ran into a similar error trying to authenticate the multimedia keyring. Not sure it worked but I am guessing the system works the same with all the authentications? I hope to understand what I'm doing wrong and what the process is.
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Mar 27, 2010
So after tinkering for a while, I was able to configure ssh for private/public key authentication and disabled Password-Authentication. In the past I had some issues with people brute force trying passwords/usernames so I want to avoid this, but I need some form of secure FTP that now doesn't work due to the aforementioned setting.
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Jan 28, 2011
I created a private/public pair. I put the public on github.But I can never push to github.Every time, it says public denied. In order to push, I need to do this:eval ssh-agentssh-add ~/.ssh/github_dsaThis is driving me nuts that I have to do this every time. So, I just put it in my ~/.bashrc file. I feel like that's a hack. Is this normal?
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Jul 4, 2010
Im trying to create a public/private key for open ssh, I don't really know what difference between the two. I want it to all be one command and not have to hit enter after each command. Here is what I mean:i type "ssh-keygen"and it asks me were to save, then my paraphrase, then reenter the paraphrase.I just want to be I guess you could say unattended if that makes any sense.
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Jul 6, 2011
I have a little problem
For years, I've been using SSH with public key authentication to connect to a remote server, and my private key is formatted like this:
Code...
I've tried creating a new key which uses DSA, but I got the same result...
Does anyone know what the cause to this might be?
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Jul 9, 2015
I've installed it properly until it works now, it does send emails and receive them, but heres the problem.
1) it does not send emails to a certain domain, unless i do dpkg-reconfigure on exim4 and put the domain on allowed relay... can't i just put something on settings which allow to send emails to ALL domains?
2) EVERYONE can connect to the server by telnet from any position, terminal or pc, and just use an existing user to send emails to anyone.... example, i have testuser123 setted up in debian/exim4 .. then they simply write "mail from:testuser123@host.dot" and the server accepts it.. without even request an authentication for that. And this is a problem, because everyone can use my email addresses to send emails to whoever.. heaven for spammers/hackers..
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Mar 24, 2010
I have trouble with rsa authentication:
I did create an rsa certificate with ssh-keygen using my root account on a client: ssh-keygen -t rsa -b 2048 no passphrase I did copy the rsa pub_key from my client to the server scp id_rsa sampleuser@sampleserver:/home/sampleuser/.ssh/authorized_keys
I did change the ownership to the "sampleuser" of the pub key file on the server: I trayd to connect:
ssh sampleuser@sapleserver
I get that: permission denied (public key)... I know I do smth wrong but I don't know what.
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Apr 19, 2009
I am trying to install openssh server with public key authentication on CentOS.
But i am getting following error message: Disconnected: No supported authentication method available Server refused keys
My sshd_conf file is as follows:
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May 26, 2011
I am attempting to set up an automatic transfer via sftp using public key authentication. I have created a public/private key pair to connect to the remote server without using a password. I have also been able to use this key pair to login from the command line: sftp -vvv -oPort=<server-side port> user@server.Debug info from interactive command:
Code:
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
[code]...
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Apr 18, 2016
I bought vps server and now I want to upload openssh public key. With this command:
ssh-copy-id username@ipaddress
the result is:
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: ERROR: ssh: connect to host xxxxxxxxx port 22: connection timed out
with this command:
cat ~/.ssh/id_rsa.pub | ssh username@ipaddress "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"
the result is:
ssh: connect to host xxxxxxxxx port 22: connection timed out
also with this:
ssh username@ipaddress
the result is:
ssh: connect to host xxxxxxxxx port 22: connection timed out
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Feb 18, 2011
I have installed nomachine on my windows 7 laptop and when I connect to the server I receive the error message:
"Authentication failed for user [username]"
Which user am I supposed to log in with? Is it the same user as I use on the server or is this a separate nx user? When I receive this message is it because of the user or the ssh key I use?
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May 20, 2010
I've been using Ubuntu since 6.04, not a linux guru by any means but can usually get myself out of trouble.
So, the issue... I installed 8.04 on my mother's laptop some time back as she was having trouble keeping Win 2000 running (she has a low spec no-name generic laptop btw). I live in Autsralia and she in England, i thought i could better support her if she was running Ubuntu... All has been well with 8.04 but with the new LTS release (10.04) i thought i'd talk her through the upgrade... Did the online upgrade via Update Manager, all seemed to go OK but when she went to log on after restart she got an error saying 'authentication failed' even though we are 100% sure we have the user name and password correct... Tried to do a ctrl+alt+F1 to by pass the GUI log on but couldn't get the terminal session to open up, just got a black screen - no command prompt.
So... thought OK re-install... downloaded the ISO, burned and sent her a CD in the post... talked her through the re-install, all seemed to go well (again) - BUT, after restart, couldn't log in "authentication failed" again...
So, remember i'm trying to talk a novice through all this... any thoughts!?!
If i can get her to log in i can then support her via some kind of remote sesion or other screen share... and it wont cost me a small fortune in international calls!!! But if i can't get a log in, i'm dead in the water!?
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Feb 24, 2010
I am not exactly newbie with GNU/Linux, but definitely new to SSH/NX stuffs. I followed the below tutorials for installing FreeNX so that I can access my desktop like TeamViewer in windows.
https:[url]....
https:[url].....
But I don't see the folder NX like the one mentioned here.Then edit the file /usr/NX/etc/server.cfg
I don't see a folder called NX to proceed. Also when I use nomachine client to connect from Windows, it couldn't connect and I get the below errors.
nxssh: <host-name>: no address associated with name.
how to make connect to freenx server from windows using nomachine client?
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Sep 24, 2010
I just finished following the instructions found here to install FreeNX on my ubuntu 10.04 server. It went smoothly, just used the default keys.Once I had that all set up I scrolled down and followed the instructions to set up the client and that went fine as well.My problem is with actually using the program.When I try to log in I get the error "Authentication failed for user tony" (my username). Do I need to change anything in the configuration other than setting it to use gnome and putting in the host address?oes it make a difference that my ssh settings only allow rsa login? I logged into the server with ssh to see if that helped but it did not. I even tried using the ssh key with the FreeNX Client but that did not work
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Jun 10, 2010
I apologize first because I do not know if this is the right section for my problem, but I could not find anything more suitable. I have an Asus 900 with Ubuntu Netbook Remix 10:04 In a nutshell: I realized today, trying to install a new program with Ubuntu Software Center, that I can not anymore authenticate myself as root. Of course I have not changed the password, but the old one is not anymore accepted ("Authentication failed").
The interesting thing is that I can install programs without problems (using the same old password) with the package manager in Administrative Tools (synaptic). Here, the authentication works well. Opening a terminal, I can use sudo to run any command by providing my password, with no problem at all. Following some guides found on the web, I reset the root password (supplying the same one as before) and everything went well. Only .... nothing has changed! Ubuntu center software authentication always fails.
What could have happened? Maybe I did some mistake by editing /etc/sudoers to solve another problem some days ago. Ubuntu told me that my username was not in the sudoers file, so I resolved it by adding to /etc/sudoers the line myusername ALL = (ALL) ALL
I checked the contents of the file and, apart from this line added, it is as it was before (I compared with that on another PC with Ubuntu). Can anyone make some sense out of it? Starting from the fact that the package manager does function ... but software center does not.
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Mar 20, 2010
the laptop of my friend runs ubuntu through wubi. The system suddenly freezed and she restarted it manually. After doing a check disk and automatically repaired some packages(unfortunately she doesn't remember what exactly, only just inode information appeared), she can't log in as when she types her username and password the answer is authentication failed. We tried to change the password through recovery mode but nothing happened.
1. Do you have something to propose to solve the login problem?
2. If not how can i access and back up her ubuntu documents through windows?
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Jul 17, 2011
I have just installed Fedora 15 on my laptop, Now i am trying to install some programs like .... skype, drivers to my printer etc but i get this message: Failed to obtain authentication.... when the installer is trying to solve dependensies...
I have tried to log in as su but i cant that ether due to fail password or username... that is the message i get at the log inn screen.
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Feb 2, 2011
I'm wasting hours on this problem: I'm setting up an always-connectable VNC server loaded via xorg.conf.
This is what I did: yum install vnc-server
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Mar 22, 2010
I have ubuntu9.10 installed inside windows Thunderbird works ok in windows. When i try to get my email in ubuntu9.10 i get this message. server responded authentication failed.
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