Ubuntu Networking :: Public Key Authentication Fails?
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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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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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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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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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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Jan 14, 2011
At home in Guangzhou, I have no problem connecting to a WPA-secured wireless router.Now I'm on vacation in another city trying to use a dLink DI-624 router. If I connect immediately after reboot, no problem. If I suspend the session and then wake the machine up again, it will try to connect and then tell me WPA authentication failed.This happens both with network manager and wicd.sysinfo says the network controller is an Atheros AR9285 (ethernet is Realtek RTL8101E/8102E, probably not relevant).Since everything works correctly with routers other than the dLink, I'd have to guess it's not a general wireless configuration problem, nor a wireless card malfunction. Maybe some bad handshaking that manifests only after waking from sleep?More out of curiosity -- I'll only be here for a few weeks and a wired connection is readily available. But, say I end up in a hotel somewhere that uses dLink for WiFi
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Mar 4, 2010
I am trying o configure phpLDAPadmin on OEL 5 with apache 2.2.14 ,php 5.13 and phpLDAPadmin 1.2.0.4
apache directory = /apache
php directory = /apache/php/
phpLDAPadmin directory = /var/www/phpLDAPadmin 1.2.0.4
I am following the way given in the website : [URL]... but after configuring when i am trying to connect to the site [URL]... Authentication Fails and I am not able to log in with my LDAP user "Manager" I am using openldap version 2.4.21
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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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Sep 26, 2010
I turned on my debian systems. Update tells me that I have 26 updates, mostly to samba. I proceed and it gives me an error saying something about public key not available. Suggests to try smart update. I do that, smart update says I have 129 updates available (reasonable I guess b/c I have not updated in close to a year)
I proceed with smart update...now it says I can install 137 updates, I hit Check, tells me it is downloading packages, then, I get an error:
W: GPG error: http://code.highrise.ca lenny Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B95C4D3ECC4D3D27
I don't understand why....What is the solution for this?
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Mar 29, 2010
My first post here. I've been using Ubuntu to run our internal mail server for a while now on Ubuntu server 9.04 and ISPconfig 2. I've read a lot of threads on poeple that have difficulty connecting to their server using SSH from outside the LAN and it is not the same problem I have. Well, not entirely the same.
My problem is that my authentication fails from outside the LAn, but I can connect to the SSH port from outside my LAN. The other threads pointed towards checking the router port forwarding etc, but I can see my SSH log in asking for my username and password. So, at this stage I know the port forwarding worked, otherwise I wouldn't even see the log in prompt.
Has anyone see this before where you can connect, but the authentication fails? I can use the correct username and password from inside the LAN, but using the same credentials from outside fails.
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Sep 16, 2010
One I cant figure out is a problem of authentication. I'm using open ldap server and try to authenticate a groupware (simple groupware) against it. As it fails, I tested with a ldap client to understand things better. Using GQ ldap client, I 'm able to browse my ldap tree successfully and to search some args from the base DN i specified. but when entering the exact uid as a search string iI got no answer whereas searching the cn returns the correct entry (and display its related entry including the uid I can't find ..) Here is the only thing I can trace in logs (syslog) when trying to seach firstname.lastname (= uid)
[Code]....
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Jun 13, 2010
I recently tried installing a new version of VirtualBox PUEL version, after uninstalling an earlier version. But the major issue I have now is that I can no longer modify my User Settings. Clicking on the "Autnenticate" icon gets me a failure notice: "System policy prevents modifying the system configuration", with details reading "Action: org.freedesktop.systemtoolsbackends.set". Hovering over this link says to click on the link to edit the file, but nothing happens. Searching the file system tells me this file does not exist. Prior to this episode with VirtualBox, I had no trouble modifying Users and Groups. I was able to remove a group from the command line, but the cannot get the GUI authorization to work. I have searched the forums and bugs for similar problems, and, although there appear to be a number of similar issues, no where can I find any clear information on how this system is supposed to work, or what I need to do to correct the problem.
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Aug 26, 2015
I upgraded yesterday from Wheezy to Jessie and I don't have any wifi connexion now. The wifi card is working because I see neighbours networks around but WAP authentication fails. I did not change any authentication datas of course.
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Aug 3, 2011
The first time PackageKit Update Applet ran, it asked me for the root passwordI accidentally pressed enter after making a typo, and ever since then Update Appletfails rror:Authorization failedYou have failed to provide correct authentication.Please check any passwords or account settings.Failed to obtain authentication. It never lets me input a new password. Two questions:1) Am I doing something wrong, or is this actually a bug? The possibility has been mentioned in other posts on the topic.2) Where does PackageKit store its files? I'll either change the password myself or delete the file where it's written, hopefully that will trigger PackageKit to ask again.
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Jul 1, 2010
I just upgraded my Ubuntu 8.04 server to 10.04 and now I cannot receive mail on my Ubuntu 10.04 Evolution client, although I can send mail. No errors appear in auth.log or mail.log when I attempt to log in from my Evolution client, in fact mail.log shows 'pop3d-ssl: connection' from my laptop IP, followed by 'pop3d: Disconnected' when the log-in attempts fail.
I'm able to ssh into the server using the same log-on and password as before the upgrade, however I haven't changed the public or private keys in my .ssh directory. I updated the ssl keys in /etc/postfix/ssl but wasn't able to receive mail before or after the update.
The error in the client reads: 'Unable to connect to POP server mail.mydomain.com, error sending username'
I ran this test and the output appears to be related:
Is the pop3 server not running TLS? /etc/postfix/main.cf says it should, and I get no errors restarting / reloading postfix.
I am receiving messages in /home/user/Maildir, but I cannot download them.
I checked for supported authentication types in my Evolution client - 'Password' is the only one supported, as was true before. The client is not using any certificates.
The output of openssl s_client -tls1 -connect 127.0.0.1:995 shows 'certificate has expired' on the 'Verify return code' entry, not sure if that's significant.
What's different about incoming versus outgoing mail authentication?
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Sep 9, 2010
I recently upgraded my video card from a GeForce4 MX 440 AGP 8X to a GeForce FX 5500 AGP 8X. After that my 1360x768 monitor was stuck on a 1024x768 resolution. I ran system-config-display and under Hardware tab I changed the monitor setting from "Generic LCD Screen" to "1360x768 LCD Screen" with the acknowledgment that /etc/X11/xorg.conf file was been modified. After reboot the boot process stuck on:tarting kojid: Kerberos authentication failed. "Resource temporary unavailable" (11) [FAILED]I tried that with both 2.6.34.6-54 and 2.6.34.6-47 kernels available on my system.I use the latest KDE version available for Fedora.
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Sep 16, 2010
I'm running eeebuntu on a Toshiba Satellite R10, I installed the Netbook Remix Package which was apparently a horrible idea. I cant click properly. I tried to open synaptic package manager to uninstall it but it tells me my password is wrong, which i know it is not. Is there anyway to fix this, i can open terminal.
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Sep 2, 2011
I am able to see my samba shares on a windows xp machine, but the username/password combination fails.I setup samba with YaST.firewall is disabled.
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Jul 21, 2010
I installed freenx-0.7.3-i486-1alien.tgz on the server (with Slack 12.1), all according to instructions. I installed the no machine nxclient 3.4.0-7 on the client (with Slack 12.2). I ran setup and configured. I used the default no-machine keys, not custom ones. Since authentication failed at the beginning, I enabled DBauthentication, and added my user and password, which seemed to allow authentication to occur.
Here is my node.conf:
# node.conf
#
# This file is provided by FreeNX. It should be placed either into
# /etc/nxserver/node.conf (FreeNX style) or /usr/NX/etc/node.conf
# (NoMachine NX style).....
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Aug 2, 2011
I'm trying to write a p2p file sharing program using python's built-in libraries. Everything is going well. The only thing is that i'd like to be able to use openssl public and private keys so only a host with the public key could access/decrypt the filesharing. I've gotten these libraries (httplib, basehttpserver, ssl, os) to work using just a pem file containing both the public and private keys but no success with them seperately. Can someone point me in the right direction or offer an alternative? PS, the goal of the project is to create an anonymous, decentralized, secure file sharing program. I want to be able to upload this to sourceforge so everyone can use it, if that's any incentive
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