Ubuntu Networking :: OpenSSH Public Key Authentication Not Working?
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
debug2: we sent a publickey packet, wait for reply
debug3: Wrote 368 bytes for a total of 1477
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.
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
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: debug1: Enabling compatibility mode for protocol 2.0
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.
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:
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.
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.
So I want to put some of my folders on my network. I open up nautilus and go to my home folder and right click -> properties-> share and then selected share this folder, made it so that others could modify stuff on it and have guest access (which is what I want), and changed the share name to "home". Then I clicked create share. I then went to Places->Network->******'s public files on [the name of my computer]. But then some stupid error message popped up saying:
"DBus error org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus)"
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?
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:firstname.lastname@example.org" 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..
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.
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
I have installed Samba 1.2.63-0Ubuntu4 (system-config-samba) on Ubuntu 10.04, and it has been working without any issues for a few months now, but now the username/password authentication does not work anymore and I can't figure out why
I have tried changing username/password(thinking maybe i forgot the correct credentials) and the new username/pass does not work either.
I have also tried "sudo service smbd restart" in terminal to restart samba but this does not work either
I can still see visible shares when browsing server via "network neighborhood" on XP,,, and can access the shares that do NOT require authentication
username/password are made up of standard characters as well
I'm trying to utilize my company's IT orginazation's LDAP service (running on some sort of windows) for authenticating users on an Ubuntu box.Another group has done something similar for CENTOS; I've used their ldap.conf as a reference as well as ap-server.html (LDAP Authentication section)I can't get it to work. When I try to connect as my corporate user I see this in auth.log:
Code: Jan 14 14:32:24 Algalon sshd: nss_ldap: could not connect to any LDAP server as cn=ldapquery2,cn=Users,dc=<companyname>,dc=com - Can't contact LDAP server
Ive been using fedora 11 fora few months now and suddenly today after I booted up fedora network authentication(the little icon that lets me choose wifi networks) isnt showing up in the upper right hand corner which isnt that big of a problem but the fact that its on start up applications and its not wondering is what Im wondering about but on top of that my internet doesnt work at all.It will work for a little bit after boot then die and when I go to network authentication and network manager no wifi networks show up and I have about 5 around my house not including my own which is also what ive been wondering.
I am using Debian 6.0 and I am trying to auto login into Debian 4.0. I generated rsa keys with ssh-keygen on Debian 6.0 and I copied id_rsa on Debian 4.0 in /root/.ssh/authorized_keys. When I tried to ssh from Debian 6.0, ssh is giving the following error and asking for password. how can I solve the problem to perform autologin?
Error: Agent admitted failure to sign using the key.
I have problem with the config file for clients which is ssh_config or ~/.ssh/config
every config that i write in them not working fore example when I change the escape character to ! its not working or any other config I checked with another system that has the same OS ((debian 6)) but the problem was there too
Do I missing something here that cause this? like enabling client configuration ?
I now have my ssh server all setup on my ubuntu 10.10 machine and properly working with a private rsa key. Anyway when I connect to it via my client it opens to: /home/myusername
I am able to run around the whole drive and have full access to everything, which is great. But I don't have anything on this hard drive. All my data and files that I really want to access are on the second drive of this computer. It doesn't have an OS on it, just files.how to change the directory to point to that drive and have full access of everything.
I resolved the issue, see post #4.I've installed gitosis on a home server running Kubuntu Maverick, but am unable to get the ssh public key to work. When I try to clone, I get a password prompt.I entered a password for the key file. Then I copied the resulting public key to the server's tmp directory:
Today I was creating an Ad Hoc network for sharing internet connection and I realized it is not working. I have done it before on Ubuntu 10.10, now on 11.04 it just doesn't work. I create a new connection (Create New Wireless Network) and it is never visible to the other computers (I checked the IPv4 settings, it was Shared to Other Computers). I really do not know what is going on, my wireless card is working perfectly fine (I can connect to other network and on additional driver it is there with a green circle).
I have two computers running Debian Squeeze. I'm trying to set up the public keys for them so that I don't need to use passwords to log in. As far as I know, I did the same thing for both, however only one is working.Here is the connection output for eachBroken:
Code: OpenSSH_5.1p1 Debian-5+b1, OpenSSL 0.9.8g 19 Oct 2007 debug1: Reading configuration data /etc/ssh/ssh_config
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
I am running Ubuntu (Karmic) and did the command: "sudo apt-get install ssh", In an attempt to download, install and setup OpenSSH. This installed both the client and server and during setup actually brought the daemon up and running as well. I then attempt: "ssh <myusername>@localhost" and it prompts me with a password. I enter the password, hit enter and immeditaly see the following results:
Read from remote host localhost: Connection reset by peer. Connection to localhost closed. I'm fairly certain that it is not on the client end as I can connect to other machines through ssh. I've tailed all the logs, messages, dmesg etc and nothing seems to be out of order, or even remotely related to shh or connections etc. My desktop machine had no (as in zero) issues installing and setting up OpenSSH, and connections can come and go as normal.