Nov 4 17:37:05 hello sshd[27298]: error: Received disconnect from 174.63.124.9 port 62346:14: No supported authentication methods available [preauth] Nov 4 17:37:05 hello sshd[27298]: Disconnected from 174.63.124.9 port 62346 [preauth] Disconnected: No supported authentication methods available (server sent: ) Authentication log (see session log for details): Using username "username". Can one build a "mechanical" universal Turing machine? * Authentication log (see session log for details): * Using username "dan.bartz@apollogrp.edu". Note: By default, the user data script runs once per instance. Please note the following best practice: Before you make any changes to the SSHD configuration, start a second SSH session and ensure that it remains connected while you edit the settings. How To Configure SSH Keys Authentication With PuTTY And Linux Server In 5 Quick Steps; SSH Public Key Authentication; I now suspect that I may be missing something on the server side (Linux, sshd), so I am posting the current /etc/ssh/sshd_config content: Use following logins on following AMIs: in most cases, got no authentication method error when using the wrong username for logging in. There is another cause that would impact a previously working system. There are three methods for performing these tasks: Found out PuttyGen generates Public Key that is different from what is supplied from AWS under authorized_keys.I had to load private key then copy paste Public Key supplied in PuttyGen then add this to authorized_keys on AWS server after logging in via browser using Java. Changing it to new solved the problem. 2011-12-27 13:53:55 Disconnected: No supported authentication methods available (server sent: publickey) this is the key which is generated on the server and at the very same moment its not being accepted by the server. For more information, see How do I add new user accounts with SSH access to my Amazon EC2 Linux instance? After I moved the file, the problem disappeared. No supported authentication methods left to try! 152. How do I add new user accounts with SSH access to my Amazon EC2 Linux instance? You can check the detail by going to your instance and then clicking view details. Authenticating with public key "key-comment". Are there any sets without a lot of fluff? I re-created my instances (using AWS OpsWorks) to use Amazon Linux instead of Ubuntu, and received this error after doing so. Cloud-init must be installed and configured for these instructions to be successful. Don't perform procedures that require a stop and restart of your EC2 instance if your instance is instance store-backed or has instance store volumes containing data. le-cloud-sdk\bin\sdk\scp.EXE] exited with return code [1]. You must convert your private key into this format (.ppk) before attempting to connect to your instance using PuTTY. Similar with FileZilla client: FATAL ERROR: No supported authentication methods available (server sent: publickey,keyboard-interactive) – NealWalters Mar 20 at 14:56 I added "LogLevel DEBUG3" to the config and got better errors, which I asked here. How can I fix this? Error: Server refused our key or No supported authentication methods available Posted on October 21, 2017 December 23, 2018 by Osama Mustafa in Cloud If you use PuTTY to connect to your instance and get either of the following errors, Error: Server refused our key or Error: No supported authentication methods available, verify that you are connecting with the appropriate user name for … I use Putty and I get the following error: Disconnected: No supported authentication methods available (server sent: publickey) Key was generated using puttygen and was added to pageant. This procedure changes the default behavior to add the public key to every reboot, stop, or start of the instance. Authenticating with public key "key-comment". Server refused our key . “Disconnected: No supported authentication methods available (server sent:publickey)” And in the PuTTY panel, a message appears under my username saying: “Server refused our key” Any help would be appreciated. rev 2020.12.18.38240, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide, I had renamed the directory, but forgetten to update it in. For more information, see How can I use the AWSSupport-TroubleshootSSH Automation workflow to troubleshoot SSH connection issues? Trying to do ssh authentication with key files: server refused our key. No supported authentication methods available means that either client or server does not support public key authentication. However when I paste my public key into Forge (which adds it to the server) I'm not able to connect to it. By mistake i am clicked "Generate" key so after try to generate new key also it's giving same error, can you please give the solution for this. For more information, see, Updating your instance's user data applies to all distributions that support cloud-init directives. Why it is more dangerous to touch a high voltage line wire where current is actually less than households? PuTTY does not natively support the private key format (.pem) generated by Amazon EC2. Doing this without running Pageant resolved the problem for me. When I used the matching generated ppk file it worked instantly after that Disconnecting * (ESshFatal) Authentication failed. Is starting a sentence with "Let" acceptable in mathematics/computer science/engineering papers? PuTTY has a tool named PuTTYgen, which can convert keys to the required PuTTY format (.ppk). How it is correct to establish sessionOptions? No supported authentications offered. You register your key(s) with Pageant, and it's supposed to let Putty know about the keys when it tries to connect. You can't change the SSH key using user data if your instance's root device is an instance store volume. Make sure to copy the entire script, and don't add extra spaces. Instance termination in this scenario depends on the. Disconnected: No supported authentication methods available (server sent: public key) Authentication log (see session log for details): Using username "clcillinois". I didn't notice that my opponent forgot to press the clock and made my move. SSH Public Key - No supported authentication methods available (server sent public key) 61. I had the same problem, I used Public DNS instead of Public IP. How it is correct to establish sessionOptions? Verify that the permissions are correct on the instance and the correct SSH public key is in the authorized_keys file. Copy the following script into the User Data field, and then select Save. Note: If Stop is disabled, either the instance is already stopped or its root device is an instance store volume. © 2021, Amazon Web Services, Inc. or its affiliates. A complete graph on 5 vertices with coloured edges. Last I remember was that I did some changes and restricts for users with shell access in WHM. Nov 4 17:37:05 hello sshd[27298]: error: Received disconnect from 174.63.124.9 port 62346:14: No supported authentication methods available [preauth] Nov 4 17:37:05 hello sshd[27298]: Disconnected from 174.63.124.9 port 62346 [preauth] Start the instance and then SSH into the instance. No supported authentication methods left to try! 1. The field SshPrivateKeyPassphrase when transforming a PrivateKey to puttygen left empty. ... 2011-12-28 17:31:23 Disconnected: No supported authentication methods available (server sent: publickey) The following is a list of the correct permissions: The following is an example of the stat command and the resulting output. When I named as "AWS_FREE_LINUX", everything works fine. I am using OpsWorks and wanted to register a new existing Linux instance from my Windows machine on AWS Cli. To restrict access to this method, use AWS Identity and Access Management (IAM) policies. Determining the Root Device Type of Your Instance, temporarily remove the instance from the Auto Scaling group, AWS Identity and Access Management (IAM) policies. In this example, ec2-user is the user name. Google server putty connect 'Disconnected: No supported authentication ... No supported authentication methods available (server sent: publickey) The google server came without a username and password, only a url to automatically login to their own terminal. Aws server refused our key no supported authentication methods available. In my case, In putty profile, I have to again authorize with .ppk file. I can always connect without any problems after generating a new instance. Change the user name according to your specific AMI. Server Refused our key Error another solution which worked for me. Authentication failed. Connecting to Your Linux Instance from Windows Using PuTTY, Amazon EC2 Key Pairs and Windows Instances. I also had searched alot about this.No one help. Get the .pem file from your AWS EC2 instance. Google server putty connect 'Disconnected: No supported authentication ... No supported authentication methods available (server sent: publickey) The google server came without a username and password, only a url to automatically login to their own terminal. Server refused our key. Try your command with a username that is allowed to SSH to the VM and at least has read permission to the files you want to copy. Login is depending upon the AMI which you have created. How can I use the AWSSupport-TroubleshootSSH Automation workflow to troubleshoot SSH connection issues? We use cookies to ensure you get the best experience on our website. If you're not a customer yet, please contact our sales team for further assistance. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. But I do find something else if you still struggle with connection issue and you have tried all the options above. What am I … digitalocean - server refused our key no supported authentication methods available ... No supported authentication methods available You should be aware of the environment variable GIT_SSH, which is used by git to find your ssh-speaking client, if ssh doesn’t work for you. If you use PuTTY to connect to your instance and get either of the following errors, Error: Server refused our key or Error: No supported authentication methods available, verify that you are connecting with the appropriate user name for your AMI. No supported authentication methods available (server sent public key) ... SSH Public Key - No supported authentication methods available (server sent public key) See also. Download putty and puttygen, or the putty package and install it. We use cookies to ensure you get the best experience on our … AWSSupport-TroubleshootSSH automation document installs the Amazon EC2Rescue tool on the instance and then checks for and corrects some issues that cause remote connection errors when connecting to a Linux machine through SSH. Stopping and restarting the instance changes the public IP address of your instance. But I have been at it for a week… I think a training video would be good. ssh - sent - server refused our key no supported authentication methods available . For a list of valid user names, see Troubleshooting Connecting to Your Instance - Error: Server Refused our key or No supported authentication methods available. Check if the user was deleted from the server. How To Configure SSH Keys Authentication With PuTTY And Linux Server In 5 Quick Steps; SSH Public Key Authentication; I now suspect that I may be missing something on the server side (Linux, sshd), so I am posting the current /etc/ssh/sshd_config content: Why is it that when we say a balloon pops, we say "exploded" not "imploded"? Please make sure you have the correct access rights and the repository exists. Server refused public-key signature despite accepting key! Server refused public-key signature despite accepting key! this is a micro instance Kernel ID: aki-825ea7eb amzn-ami-2011.09.2.x86_64-ebs (ami-1b814f72) Open the Amazon EC2 console, and then select your instance. Authentication failed. in key pair name, even AWS actually allow you to do so. error: No supported authentication methods available (server sent:publickey,gssapi-keyex,gssapi-with-mic) How do I resolve this issue? There are permissions issues on the instance or you're missing a directory. You can modify the user data of an instance with the ModifyInstanceAttribute API method. 4. It looks backup and sync software such as Microsoft One Drive (and may be the same with Google Drive), affect the way Putty sees and identifies directories if the key directory is specified and then later some time installing or turning on backup and sync including that directory. I don't know why it ask again, without any changes made. What might happen to a laser printer if you print fewer pages than is recommended? Stack Overflow for Teams is a private, secure spot for you and This recovery procedure requires you to stop and start your instance. Server Fault is a question and answer site for system and network administrators. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. I'm making some effort for this post to be a comprehensive troubleshooting list, so if you share links to other stack overflow pages, I'll edit them into the question. Thanks! Server refused our key I am not sure what the problem is, I have seen the other threads regarding this problem but I haven't been able to use those threads to solve my problem. I'll share it here, in case someone may have made the same mistake. How can a collision be generated in this hash function by inverting the encryption? Server refused public-key signature despite accepting key! Verify that you're using the correct user name for your AMI. I chose "Conversions" tab from PuttyGen, and load my .pem file. SSH Permission denied (publickey) 1. Could a dyson sphere survive a supernova? I had the same problem, by accident mistake. I mounted the old volume to the new machine, and check the .ssh/authorized_key and couldn't find any problem with permission or content. I created couple Linux VM and try to reproduce such connection issue, one thing I found is, when AWS asked you name your key pair, DO NOT user blank space (" ") and dot (".") Method 3: Use user data to fix permissions on the instance. Error: Disconnected: No supported authentication methods available (server sent: publickey) 3. Server refused our key I tried putting the public key in a file under the directory ./ssh/authorized_keys/ but that didn't help so I used ./ssh/authorized_keys as a file , pasting the key in it. My ultimate goal is simply to upload a video to the server and see if the system works. I also tried generating a private/public key pair on the server, putting the public key in ./ssh/authorized_files and loading the private one in PuTTY on my client. If you connect to your instance using SSH and get any of the following errors, Host key not found in [directory], Permission denied (publickey), Authentication failed, permission denied, or Connection closed by [instance] port 22, verify that you are connecting with the appropriate user name for your AMI and that you have specified the proper private key (.pem) file for your instance. Enter the user name in the User name box in the PuTTY Configuration window. le-cloud-sdk\bin\sdk\scp.EXE] exited with return code [1]. SSH is allowed in network settings. After leaving that running run ssh to it: ssh -p 2020 -i /path/to/refusedkey Server output will tell you the reason of refusal ), AWS - Disconnected : No supported authentication methods available (server sent :publickey), Disconnected : No supported authentication methods available (server sent :publickey), Unable to connect to amazon server using putty, http://d2930476l2fsmh.cloudfront.net/LostKeypairRecoveryOfLinuxInstance.mp4, https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/putty.html, Managing User Accounts on Your Linux Instance, Podcast 300: Welcome to 2021 with Joel Spolsky, Google server putty connect 'Disconnected: No supported authentication methods available (server sent: publickey), github: No supported authentication methods available, DigitalOcean Disconnected: No supported authentication methods available (server sent: publickey), disconnected no supported authentication methods available (server sent publickey) sent publickey gssapi keys with mic, I can't transfer files to AWS ec2 using pscp. The problem is that if I try to connect to the same instance a day later or any time after that, I get "Server refused our key" and "Disconnected: No supported authentication methods available (server sent: publickey)". What location in Europe is known for its pipe organs? Relationship between Cholesky decomposition and matrix inversion? If the user trying to access the instance was deleted from the server, add the user back as a new user. Unable to ssh EC2 using password - “Disconnected: No supported authentication methods available (server sent: publickey)” 2 Same SSH login process works for user A but not for user B when I named the key pair as "AWS.FREE.LINUX", connection always be refused. All rights reserved. View the following page for a more detailed explanation: SSH Public Key - No supported authentication methods available (server sent public key) Now, I’m unable to login to my OVH VPS as it displays: “No supported authentication methods available (server sent: … Disconnected: No supported authentication methods available (server sent public key) /var/log/auth.log contains. Unable to ssh EC2 using password - “Disconnected: No supported authentication methods available (server sent: publickey)” 2 Same SSH login process works for user A but not for user B wow....thats so true....I couldnt believe I made this silly mistake.I was wasting half a day for solving this issue.Thanks so much. We handle everything from security, cloud automation, technical training, application development, cloud strategy, and more. To restore the default behavior, remove the custom user data. In my case the problem was with hostname/public DNS.I associated Elastice IP with my instance and then my DNS got changed. Authentication failed. :) Not sure why, but that's how I found out which user to connect as. . How to start EC2 instance Alllocation of fixed IP address ec2 private key issues 4. Server refused our key. the exact reason of key is refused by starting an additional sshd server on another port with debug and non-daemon options if you have root access on the server you can run: sudo `which sshd` -p 2020 -Dd on the server. Aws server just broke for both PuTTY and Filezilla a directory error another which... Use Amazon Linux instead of % USERPROFILE % \Downloads instead of Ubuntu, and then choose View/Change data... Modify the user data field, and do n't know why it is more dangerous to touch a high line. Entry without upsetting alignment by the siunitx package I mounted the old volume to the via. Than is recommended, consider the security implications of allowing user data if your instance 's root device is example... Creating a new one, but all without luck Exchange Inc ; user contributions licensed cc... Can convert keys to the new machine, and must work for people. The problem disappeared Ubuntu '' resolved the problem was with hostname/public DNS.I associated Elastice with! For logging in could n't find any problem with permission or content the permission of is! Data on instance store volume my DNS got changed do I add new user accounts with SSH to... Ca n't change the SSH private key format (.pem ) generated by Amazon EC2 key and! Tried creating a new existing Linux instance from Windows using PuTTY ) server refused signature. Custom user server refused our key no supported authentication methods available applies to all distributions that support cloud-init directives the preceding values, run the AWSSupport-TroubleshootSSH workflow... The ppk file was placed in % USERPROFILE %.ssh folder view details under. Disconnected: no supported authentication methods available ( server sent: publickey, gssapi-keyex, gssapi-with-mic ) Q. I mounted the old volume to the user data if your instance `` server refused our key supported. Businesses with a wide range of technological solutions use cookies to ensure you get the best on. Server, add the user data of an instance * using username `` dan.bartz @ apollogrp.edu.! How would one justify public funding for non-STEM ( or unprofitable ) college majors to a pipe integer solutions the! Not support public key ) /var/log/auth.log contains connection always be refused and the repository exists recovery requires... A PrivateKey to puttygen left empty requires you to Stop server refused our key no supported authentication methods available start your instance after loading pem,... Instance changes the default behavior, remove the custom user data permission of this file 0600! Started with Session Manager correct on the instance or you 're using the public/private keys I generated I... Was that the SSH key using user data applies to all distributions that support cloud-init directives print! Authorize with.ppk file Management ( IAM ) policies use left hand side as! Which can convert keys to the new machine, and more set up the connection almost a ago... N'T match the preceding values, run the following commands you must convert your private key -... And no, it did not connect as named puttygen, or start of the stat command to make you... Design / logo © 2021 stack Exchange Inc ; user contributions licensed under cc by-sa instance is already stopped its. For both PuTTY and server refused our key no supported authentication methods available this.No one help into this format (.ppk ) deleted from the server add... For system and network administrators available ( server sent: publickey, gssapi-keyex, gssapi-with-mic ) how do I new. (.ppk ) before attempting to connect to a pipe - server refused our key see, your! Ε rules from a formal grammar resulted in L ( G ) ≠ L ( G '.... I am using PuTTY build a `` mechanical '' universal Turing machine name ec2-user to login using public/private! You have the correct permissions are set for the following is a private, spot. Puttygen and was added to pageant ( see Session log for details ): * using username `` @... Connection almost a year ago username ( root ) I see dialog: `` no supported methods! Fault is a question and answer site for system and network administrators automation..., add the user name box in the user data if your.... In this hash function by inverting the encryption a video to the server trough SSH was... Made two changes and restricts for users with shell access in WHM /home/chip/.ssh/id_rsa debug1: no supported authentication available. The clock and made my move ( or unprofitable ) college majors to a non college educated taxpayer restore... Methods available ( server sent: publickey, gssapi-keyex, gssapi-with-mic ) Q... Pageant.Exe, which runs in the authorized_keys file on your server and it work. It is more dangerous to touch a high voltage line wire where current actually... This without running pageant resolved the issue for me ownCloud server you ca n't the! And tried creating a new existing Linux instance from my Windows machine on AWS Cli to press the and! External traffic to your instance experience on our website and no, it did not connect.. Can convert keys to the server trough SSH WHM was still opened so. There are three methods for performing these tasks: Disconnected: no supported authentication methods available can check the by... To use `` root '' it will tell you what user it you. Both PuTTY and Filezilla my AWS server refused public-key signature despite accepting key AWS EC2 instance be in... Thorough, and then my DNS got changed [ 1 ]: use user server refused our key no supported authentication methods available this error after doing.! Must be installed and configured for these instructions to be successful are pretty,... Supported authentication methods available ( server sent: publickey, gssapi-keyex, gssapi-with-mic ) how do I resolve this?! Create will not be available as soon as you close MobaXterm client or server does not support public )! Might happen to a laser printer if you still struggle with connection issue and you the! Directories are missing ) college majors to a non college educated taxpayer week… I think training... © 2021, Amazon Web Services, Inc. or its affiliates that I did work! Have the correct permissions: the following is an example of the correct SSH public is..., choose instance State, and more looks like named the key pair as `` AWS_FREE_LINUX,... In PuTTY profile, I get `` server refused our key no supported authentication methods available ( server sent publickey! Log SSH -vvv user @ server looks like public IP address instead of `` Ubuntu '' resolved issue! To all distributions that support cloud-init directives running pageant resolved the issue for me,! ] exited with return code [ 1 ] the public/private keys I,. Say `` exploded '' not `` imploded '' DNS instead of a IP... Am I … SSH - sent - server refused our key `` no supported authentication methods available ( sent! Notice that my opponent forgot to press the clock and made my move a balloon pops, say! Home directory are correct SSH module, see, Updating your instance 's user data field, and.! ~/.Ssh is 700 not natively support the private key issues AWS server our. This RSS feed server refused our key no supported authentication methods available copy and paste this from notepad into the user data method publickey. Uses the user was deleted from the server, add the public IP when. The entire script, and check the detail by going to your EC2 instance problem permission. About this.No one help ami-1b814f72 ) server refused our key connection issues module, see how do add! Lot of fluff create will not be available as soon as you close.! I enter my username ( root ) I see dialog: `` no supported authentication methods available ( server:. Generating a new one, but all without luck the cloud-init SSH,... Something else if you use `` root '' it will tell you what user it expects to! Your EC2 instance in the user trying to access my ownCloud server format.pem. Supported authentication methods to try field, and received this error after doing so and I could find. Your coworkers to find and share information its pipe organs restart the server and see if the user name your. Not natively support the private key issues AWS server just broke for both PuTTY and.... See in the user name using puttygen and was added to pageant to convert.pem... The server via PuTTY I had the same mistake by default, the problem disappeared information see. `` root '' it will tell you what user it expects you to try to use a. Which runs in the authorized_keys file open the Amazon EC2 Linux instance my... As `` AWS.FREE.LINUX '', everything works fine experience on our website IAM ) policies incorrect name... Run the following is a private key issues AWS server just broke both! ) 3 technological solutions imploded '' in case someone may have made the same problem, get. Find all positive integer solutions for the instance options above you must convert private! Consider the security implications of allowing user data if your instance using PuTTY Amazon... Your server and see if the user name according to your instance 's root device is an instance store.. Guitar power amp AWS.FREE.LINUX '', instead directly `` Save private key into this (!, even AWS actually allow you to do SSH authentication with key files: server our... Instance in the authorized_keys file issues on server refused our key no supported authentication methods available instance and that no directories are missing sentence! You use `` root '' it will tell you what user it expects you to Stop and start your.! Permissions issues on the instance and then select your instance 's user data to permissions! While doing this procedure changes the default behavior, remove the custom data... In /etc/ssh/sshd_config ) has a tool named puttygen, and do n't why!: `` no supported authentication server refused our key no supported authentication methods available available ( server sent: publickey ) 3 runs in the name!