Debian :: Sshd Disable Password Authentication?
Oct 13, 2010
I set up a debian lenny in vmware on my windows machine. The network interface is set to bridged, so the virtual machine is connected directly to the university network i am connected to. I want to be able to ssh into the vm.I installed sshd via "apt-get install ssh", generated a key pair with puttygen and copied the public part to "/home/user/.ssh/authorized_keys", set rights to 600 and then tried to disable password authentication completely, following the "securing debian" documentation.this is how my /etc/ssh/sshd_config looks now:
# Package generated configuration file
# See the sshd(8) manpage for details
# What ports, IPs and protocols we listen for
[code]...
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Feb 2, 2010
Is there a way to disable password authentication completely? The command line is the following:
ssh -o KbdInteractiveAuthentication=no -o PasswordAuthentication=no machine"
it STILL asks for a password. Of course I would like to do this without touching the server, if possible.
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Aug 16, 2010
I have a problem with ssh.I followed this guide:and no matter what I try, I still can't disable password authentication. I want users to require a private key to prevent from brute force hackers.
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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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Dec 19, 2010
How to disable the NTFS drives root password authentication?When I try to access the NTFS drives for the first time after logging in, the system is asking for root password authentication.How can I disable this?
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Aug 8, 2011
I was hoping that someone could point me in the right direction. I just did an install and the os is up and running. During install, I set a root password and also set up a regular user account. The only option at login is the regular user acct. Needless to say, the os asks me to provide the root pw for just about everything I need to do.get an authentication failure. (I assume that this is the same as permission). I can find plenty of info on how to restrict access but nothing relevant to my problem. Just to rule out an install problem, I installed the os a 2nd time. I am very sure I have my passwords correct. One other thing to note is that on the 1st install, I used a different pw for root and regular user. On the 2nd, just to keep is as simple as possibl I used the same pw for root and reg user account. I am new to debian, but the distro that I have been using (slackware)
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Jan 10, 2010
I want to configure SSH key-based authentication and SSH password Authentication in same machine for different user .
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Apr 8, 2010
My system software is installed on an encrypted LVM on hda1 and hda2. My home directory takes up the whole of hdb1 which is also encrypted. I can boot up into the kde desktop okay, but when I open up konsole and type 'su' and my root password I get the message "su: Authentication failure". I am absolutely certain that I am using the right password.
Even more strangely, if I fire up synaptic and give it that same password I am able to install software. Does anyone have any suggestions as to what's gone wrong and how I can fix it?
I can also type Ctrl-Alt-F2 and log in as root to do administrative tasks without any problems so I cannot understand why konsole has locked me out.
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Mar 13, 2011
just started using Debian today and I would like to know how can I disable the user acount password, I am the only user on this computer so I would like it to boot strait into my account.
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Mar 9, 2011
I want to enable sshd from Internet, but I want to secure it as much as possible.Therefore, despite the fact that the service will run on a tcp port above 2000 to prevent most scans, I would like to :- First, force the use of a client certificate, to avoid brute force attack on my users/passwords- second force the use of a username/password to avoid someone having access to my system just by stealing my key..When I look at the configuration, it's possible to enable both, but one of them is sufficient to login, but I can't find how to make them both mandatory...
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Jul 18, 2011
I'm trying to figure out why my industrial appliance (x86, running kernel 2.6.21.7 and OpenSSH_4.3p2 / OpenSSL 0.9.7m) accepts ssh connections without asking for a password (even for root)!When I log on to the local console as root I have to enter a password but strangely this prompt won't appear using a ssh connection (although I'm not using any client certificates).Of course that not acceptable but I just can't find the related configuration entry to disable this "password-less" authentification.Is this related to the sshd or has it something to do with the PAM module?
- Update ->
While looking at /var/log/secure, I've found the following lines:
Jul 18 16:55:07 localhost sshd[5712]: Accepted none for root from XXX port 6393 ssh2
[code]....
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Mar 28, 2010
Quote:
Code:
I've used these commands to generate my new keys and immediately got my sshd server running.
However, I now have the problem where the password is not being recognized and is repeatedly asked for.
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Apr 28, 2010
I have a rather difficult problem. Every time I need root privileges and I am asked to authenticate (i.e. Update Manager, mounting a partition, etc), the password window comes up, shakes and immediately closes, leaving me with no chance to enter a password. What to do?edit: this is NOT the login window, just the little dialog that pops up when you need elevated privileges.
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Aug 10, 2010
I have a problem with sshd daemon on a target linux system:The system has only one user (root) without password.The sshd_config looks like:
Code:
Port 22
Protocol 2
[code]...
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May 27, 2011
We have installed the Centos on server. I have enabled the ssh key authentication in that server. Now we can connect through ssh only with key file.Since this server is protected with SSH, I am unable to use the SCP command. If I use this command it says "Permission denied (publickey,keyboard-interactive).". Please let me know How Can I disable SSH Key or why SCP command is not working ?
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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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Dec 20, 2010
I am the only user.So i would like to disable authentication for software center and update manager which is being asked everytime when i install softwares/updates..How to acheive it?
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Apr 3, 2011
having a slow internet connection, I bought the all maverick repository on DVDs, copied the files on a usb drive and modified the apt sources file to consider the local repository only:
Code:
# deb file:/var/www/ubuntu_local/ ./
deb file:/var/www/maverick/dvd1/ maverick main universe restricted multiverse
deb file:/var/www/maverick/dvd2/ maverick main universe restricted multiverse
deb file:/var/www/maverick/dvd3/ maverick main universe restricted multiverse
[code]....
Even though I am reasonably sure it is safe, this local repository is not authenticated and I can only install package through the command line or synaptic, the Ubuntu Software Centre giving an error message "Requires installation of untrusted packages"...I thus would like to disable the apt authentication check for this local repository.
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Jan 6, 2010
I'm dual booting Ubuntu 9.10 and win7. I have an NTFS partition on my disk and whenever i want to browse files on that partition I'm required to enter my password. my problem is that my music folder is located on that partition, and as a result, whenever I open rhythmbox, it cant access the files on that partition and begins to remove them from the library. in order to prevent this i must browse to that partition manually and enter my password upon request, prior to opening rhythmbox.
on a side note - shouldn't the spell checker on the Ubuntu forums recognize "Ubuntu" as a legit word ?
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Jul 25, 2011
I am running a small ubuntu-server headless machine at home. It is configured with sshd so that I can connect from anywhere (if I have Internet access.)However, there is a thing: I'd like to have good security and disable password authentication, but I also want to be able to connect from a PC that I've never touched before. And no, I'm not prepared to type a 256 bytes password every time I type "sudo ..."
Here is what I thought: I could have a login (pieroxy) that has a moderately strong password and another user (pieroxy-ext) that has a very strong password (100+ chars.) I would use my regular account (pieroxy) whenever I have a key-based authentication and the other one (pieroxy-ext) whenever I have a password-based authentication to do. Then, I'll just su to "pieroxy" and I'm done typing the 100 chars pwd. In order to do that, I would need to be able to configure my machine so that password-based authentication is disabled for all accounts but enabled for my account that has a strong password (pieroxy-ext). Is it possible to disable password-based authentication on a user basis?
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Oct 8, 2010
I had installed xp & ubuntu on my laptop hp compaq cq-40. Then i got this problem on su password authentication failure. I had alreadyformat and re installed ubuntu. But the su authentication still failure,
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May 3, 2011
I am running Ubuntu 11.04 which I like very much (except for Unity - so I am using Ubuntu Classic).
Whenever I try to use "su - " I get Password Authentication Failure. I have checked Caps Lock (obviously) and have also tried resetting the password using "passwd" - but with no success.
If I use "sudo ...." with a command the password is accepted.
I have the same software installed on two computers but the problem only occurs on one - the other is OK!
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Sep 20, 2015
When i login on localhost with pubkey-auth, i get the following in my log
Code: Select allSep 20 12:42:27 aldebaran sshd[19745]: Accepted publickey for root from 127.0.0.1 port 37520 ssh2: RSA 45:4e:27:4d:30:f5:3d:25:10:d0:92:88:53:77:1a:3b
Sep 20 12:42:27 aldebaran sshd[19745]: pam_unix(sshd:session): session opened for user root by (uid=0)
Sep 20 12:42:27 aldebaran systemd[19757]: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Sep 20 12:42:27 aldebaran systemd-logind[585]: New session 70 of user root.
Sep 20 12:42:27 aldebaran systemd[19757]: Starting Paths.
[code]....
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May 30, 2010
I tried recompiling a new kernel yesterday (2.6.34) on my debian sarge box, but I ran into multiple difficulties. These difficulties forced me to do a double dist-upgrade to lenny. The new kernel was (seemingly) compiled without any hiccups, and I ran dpkg -i on both the image and the header debs. They didn't install properly into grub, but I think I managed to fix that manually.Next thing I did was rebooting the server. It refused to come back up. Luckily my ISP has recovery tools, so I managed to switch back to the old kernel. It boots just fine with that kernel, but the problem is that there is no ssh daemon running! I can access it through ftp and do limited jobs through php, but nothing big, as I have no root access.Now, enough backstory. My question is: How can I install openssh-server onto the server remotely? I cannot access the server personally, as the server is in a completely different country.
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May 27, 2010
When I signed up for my Debian Linux VPS hosting and first logged on and invoked ps, there was the only user process running: sshd. As I can see, this was minimal Linux with only two things installed and configured: sshd and apt (plus all dependencies, of course).
I want to build (or use existing) similar Linux distro, any advice on how to build (or pick) one? Googling "minimum linux", or "linux with sshd only" usually brings up Debian's netinstall, which is not what I want.
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Jul 19, 2011
We have small requirement, we need to connect to ssh server through ey+Passphrase+password. Is it possible to configure this type of authentication in any version of openssh/fedora.
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May 2, 2010
have been experiencing an error (the past few weeks) whenever I try to install a software package using the default installer. Each time I enter the root password it is not accepted and I am unable to get past it and the installation fails.This is the error message that is issued:[PK_TMP_DIR|dir:///var/tmp/TmpDir.mf2zCf] Repository already exists.I am able to enter the root password in a terminal session without any problem along with using the Install Software option in the main menu.
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Jun 13, 2010
I've been having enormous problems with pam authentication. I use opensuse 11.1, postfix 2.5.5, dovecot 1.1.7. , ssl, dovecot-sasl. Everything works fine within local network, but I can't log in from outside (using outlook express 6). Output of dovecot -n:
protocols: imap imaps pop3 pop3s
listen(default): *:143
listen(imap): *:143
listen(pop3): *:110
[code].....
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Feb 8, 2011
I've been using the Ubuntu desktop for a couple of years now, but I don't have much experience using the terminal.
I've just set up a home server using Ubuntu-server 64bit which will be headless and its main function will be a Mythtv backend.
I've worked out how to use VNC to send a desktop from the server to my laptop, but when I try to use any programs which require root privileges such as synaptic or the user/groups manager, the pop-up asking for authentication refuses to accept my password.
Is there a setting I need to change on the server which prevents remote users from getting root privileges on the desktop?
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Dec 5, 2010
Server A: Generated RSA Key
Server B: Added the RSA Key to authorized_keys list
SFTP from A to B.
Still prompts for password.
I will be sftp-ing both from Server B to Server A and 'A to B'. Sever B to Server A works fine. No prompting for password. But from A-B it this is what is happening sftp -v log...
debug1: Offering public key: ~InfAdmin-.ssh-id_rsa
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Trying private key: ~InfAdmin-.ssh-id_dsa
debug1: Next authentication method: password
InfAdminATServerB's password:
Why is this trying id_dsa private key? From Server B to Server A when I do the same, it does not say 'Trying Private Key -id_dsa' This is what it says
debug1: Server accepts key: pkalg ssh-rsa blen 277
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
How do I enforce that Server A does the same? Why is it trying the dsa private key when I have used RSA.
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