Add correct host key in /home/myuser/.ssh/known_hosts to get rid of this message. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! We think our community is one of the best thanks to people like you! @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! * * Theres one more method to alter the known_hosts file on Mac: using the ssh-keygen utility from the command line. The fingerprint for the ECDSA key sent by the remote host is SHA256:Yjpzsxo3jodfkjdid8dfd8jjN . Once done, you'll have a new fingerprint in our known_hosts file for this server, and the warning will be gone. Commentdocument.getElementById("comment").setAttribute( "id", "ad09683d818f5a0c873f1b7fa150f8df" );document.getElementById("c04dd471bd").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! You shouldnt attempt to fix the error unless you have complete confidence that the issue isnt malicious. This can happen when using git with a Bitbucket Server ssh url or ssh itself. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! This is done after first connecting to the server, and will prompt you with a message like this: If you enter 'yes', then the fingerprint is saved to the known_hosts file, which SSH then consults every time you connect to that server. 1. Learn more in this guide Click to Tweet. Learn the landscape of Data Visualization tools in Python - work with Seaborn, Plotly, and Bokeh, and excel in Matplotlib! . 0 general. However, if you use the OpenSSH client, there is a file. message is trying to warn you about. IP, @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! If you use PuTTY, the SSH key mismatch warning looks like the image below: In this case, click "Yes" if you know the reason for the key mismatch (IP address reassigned to another server, machine replaced, and so on). sed -i '/1.2.3.4/d' /home/scott/.ssh/known_hosts The first time you ever connect to this device, it will save this fingerprint to a local file (by default, it will be the "~/.ssh/known_hosts" file on a Unix-like operating system). The Warning: Remote host identification has changed error protects your connection from certain malicious attacks, although in some cases, you can inadvertently cause the error too. We'll get back to you in one business day. However, you have more flexibility for doing so on Mac. Host key verification failed. and refuses to connect to hosts whose host key has changed. Regardless, you can fix the error in no time through a Command Prompt or Terminal, using just a handful of commands. "Please contact your system administrator." You need to do that. Someone could be eavesdropping on you right now (man-in-the-middle attack)! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that the RSA host key has just been changed. But you can fix this in a few steps. Last unsuccessful login: Mon Dec 6 13:51:17 CST 2010 on /dev/lft0 This provides maximum protection against trojan horse attacks, though it can be annoying when the /etc/ssh/ssh_known_hosts file is poorly maintained or when connections to new hosts are frequently made. issue But, sometimes, for some reason, it could happen that remote host changes its ECDSA key. To remove this message, simply open a new terminal window and enter the following command (where IPADDRESS is your server's IP address): ssh-keygen -R IPADDRESS Of course, if the fingerprint differs from what is in the known_hosts file, this could indicate a malicious user is targeting you. Or use ssh-keygen to delete the invalid key (preferred solution) ssh-keygen -R "your domain name or IP". I tried zeriozing the key on the switch I get the error when trying to ssh to. The primary time you log into a bunch, or after you delete your known_hosts file, the host doesn't exist within the known_hosts file anymore. There is a pro version, and I always recommend supporting developers when you can. If the client thinks those fingerprints differ from what it understands to be correct, youll get the Warning: Remote host identification has changed error at the point of login: As errors go, this is detailed and clear it tells you whats happened, a potential reason for why, and how you might fix it. Open the known_hosts file specified in the warning message @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! When a user tries to do SSH to SRX, he gets an RSA finger print mismatch message. Connect on Twitter, subscribe to my newsletter (once a month), or buy me coffee. . An awesome app calledSSH Config Editorlets you manage your SSH client configuration file and other settings. The reason of refusal is that this is the exactly same scenario as the man-in-the-middle attack. One of the most secure ways to connect to a web server is to use SSH. You can access your site from almost anywhere you can use the internet, as long as you have the right login credentials. If so, this fingerprint will become part of your known_hosts file. Right-click on the known_hosts file in the Finder window & choose "Duplicate" from the contextual menu. When host keys on a remote system have changed, either because they were manually regenerated or because ssh was re-installed, the new host key will not match the one stored in the user's known_hosts file, and ssh will report the error then exit. The fingerprint for the RSA key sent by the remote host is 5c:9b:16:56:a6:cd:11:10:3a:cd:1b . 2013-2022 Stack Abuse. The first line provides the file name and the line number of the old key. However, the system works almost too well. This could be due to the OS being reinstalled, SSH reinstalled/update, or from keyssh-keygen being ran. Products & Services Knowledgebase Warning: remote host identification has changed when connecting via ssh to an host. forum:bopritchard 6 years, 3 months ago. . Solved: remote host identification has changed To do this, you can run rm .ssh/known_hosts in a Terminal window. SSHIPOS. If the problem is on YOUR end you can remove line THREE (and ONLY line three) in . SSH, or Secure Shell, is a very common way to securely access remote machines, typically via the command line. Some users may prefer the PuTTY client. mean and how do I correct the problem? Manually Resolve via known_hosts In the warning message find the line that tells you where the offending ECDSA key is located in the known_hosts file. Search results are not available at this time. For example, if you recently migrated your website to a new hosting provider, your IP address would be different. Hopefully, now you have connected again and are back at work! If you are sure that it is harmless and the remote host key has been changed in a legitimate way, you can skip the host key checking by sending the key to a null known_hosts file: $ ssh -o "UserKnownHostsFile=/dev/null" -o "StrictHostKeyChecking=no" user@host. , sshpublic key~/.ssh/known_hosts sshOpenSSH, Tangston: This type of hosting includes a support team that will make sure your site runs as it should. Someone could be eavesdropping on you right now (man-in-the-middle attack)! For example if you have 3 server as follows. Original contents retained as /home/myuser/.ssh/known_hosts.old Of course, this isn't always the case, and there are many reasons for the ECDSA key fingerprint to change for a server. share Check out our plans or talk to sales to find the plan thats right for you. 1 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! Viewed 5k times 4 I've followed the recommendations I could find to prevent this from happening. Cause The cause for the issue is that the host key for some net interface have changed, all the host keys for the target compute node need be renewed. Read our Privacy Policy. Open your start menu and search regedit. Click Enter.. IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! I am aware that one way to achieve this is to change the ecdsa key on the ssh server and force the server to use its ecdsa key to identify itself by editing Hostkey in /etc/ssh/sshd_config. We also try to be at that level with our SaaS tool support. For Windows, youll use a dedicated interface (and well talk about this in more detail later). It has no method to confirm if it's the right host or not. It is also possible that a host key has just been changed. then I configure to no avail: crypto key generate rsa general-keys modulus 2048 Perhaps I am using incorrect parameters. Ask Question Asked 2 years, 6 months ago. The fingerprint for the RSA key sent by the remote host is Someone could be eavesdropping on you right now (man-in-the-middle attack)! Ansible warning that host key has changed, even though I've taken multiple steps to prevent this warning. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! It also includes security features, such as virus protection and migration assistance. 4. This is great if you dont want to dig into the file itself, or if you want to work with only one site or key. Add correct host key in /home/xxxxx/.ssh/known_hosts to get rid of this message. Add correct host key in /Users/rocket55/.ssh/known_hosts to get rid of this message. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! This is alarming because it could actually mean that you're connecting to a different server without knowing it. If the warning message is encountered each time the machine hosting Bitbucket is restarted, please see the KB, "REMOTE HOST IDENTIFICATION HAS CHANGED" is reported each time the server hosting Bitbucket is restarted. To find it, open the Windows search bar, and navigate to your user folder with the %USERPROFILE% command. If you are confident that the host key changed for a known reason (i.e. You probably wont need the SSH Config Editor app that often, so I dont recommend pinning it to your dock. To fix the problem of remote host identification has changed , we can also remove the old host key info with ssh-keygen command. @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Youll want to open the Windows Registry Editor (otherwise known as regedit). When you first connect to a server, youll often get a confirmation request through your interface, asking whether you want to connect. If this new server is malicious then it would be able to view all data sent to and from your connection, which could be used by whoever set up the server. How to fix the warning: remote host identification has changed! Host key verification failed. One aspect the keys help with is to provide a permanent fingerprint of its host server. Are you sure you want to continue connecting (yes/no)? Someone could be eavesdropping on you right now (man-in-the-middle attack)! Open SSH Config Editor and click on File Open Known Hosts.. For now, well have to resort to our step by step troubleshooting processes. yes Warning: Permanently added 'switch1,192.168.1.101' (RSA) to the list of known hosts. Kinsta spoiled me so bad that I demand that level of service from every provider now. You can fix the problem by removing the IP address that you are trying to connect to from your ~/.ssh/known_hosts file. You can also set these options permanently in ~/.ssh/config (for the current user) or . On Windows, its stored in the registry. . @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! After that, delete the line with the key for this IP address. This could happen for a few reasons, one example would be that you're not connecting to the host you wanted - some other machine took the IP of machine you wanted to connect to. 3. But what happens if a server's ECDSA key has changed since you last connected to it? @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! This option is useful to delete hashed hosts (see the -H option above). . Step 1 Install the free SSH Config Editor app. error. It's not always a bad thing (it's protecting your connection from malicious attacks! You may get the Warning: Remote host identification has changed error for a few reasons, and some are innocent. On Microsoft Windows, if using PuTTYcache The fingerprint for the RSA key sent by the remote host is x. Modified 2 years, 1 month ago. It is also possible that a host key has just been changed. Legal information. A secure internet connection is not just the ideal its essential. As for the Warning: Remote host identification has changed error, it relates to the security checks your client will do. After this, when you will try to use SSH to connect to the host, you will see this message: The authenticity of host ' [your host information . Another option would be to remove all the entries. @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! Open the Terminal app. If you're on a tight budget, the free version is enough to manage your known_hosts file. lost connection @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Why you're getting Remote Host Identification Has Changed Warning This happens when you connect a different machine with the exact same IP address before. The easiest ways I've found to fix this problem is the following two solutions. You may get warnings, but get the option to connect. The fingerprint for the RSA key sent by the remote host is SHA256:FbutMeM/HvPp1X4yt8938QzMKkNtlp9a5GzqwP2OTDo. remote host identification has changed! This error brings me to a halt. Offending RSA key in /home/xxxxx/.ssh/known_hosts:2 RSA host key for xxxxx has changed and you have requested strict checking. Open up a terminal session, and type one of the following command. Log in to MyKinsta. ". @@@@@ @ warning: remote host identification has changed! An SSH connection uses dedicated keys small files stored on your computer as authentication. Someone could be eavesdropping on you right now (man-in-the-middle attack)! Log in. Its used as a reference client file for the authentication process. The issue on the client side host file will be fixed. For a limited time, your first $20 is on us. RSA key fingerprint is zzzzzzzzzzzzzzzzzzzzzzzzzzzzzxxxxxxxxx. Important Consider it like a super-SFTP type of setup, although its not a 1:1 comparison in practice. ACM.99 Verifying that you are making an SSH connection to the host you think you are This is a continuation of my series of posts on Automating . Someone could be eavesdropping on you right now (man-in-the-middle attack)! Your laptop is aware of nothing about that host. Subsequently it pops up the second warning: The authenticity of host . It is also possible that the RSA host key has just been changed. In that case, since the public key is changed for this same IP, connection got refused. I craft actionable content and develop performance-driven WordPress plugins. In my example this line said "Offending ECDSA key in /Users/scott/.ssh/known_hosts:47", which refers to line 47. Please contact your system administrator. Someone could be eavesdropping on you right now (man-in-the-middle attack)! Managed hosting has many benefits, but you need to consider whether it is right in your case. Step 2 Open SSH Config Editor and click on "File Open Known Hosts." Open known_hosts file Step 3 Find and highlight the entry that is having the issue. You can work to fix the Warning: Remote host identification has changed error for both Windows and macOS. Windows cmd 2 Linux .ssh Windows .ssh known_hosts Linux ssh . En ocasiones llegamos a tener problemas al intentar loguearnos a ssh podemos llegar a ver un mensaje asi:@@@@@. Delete it! The known_hosts file should be in /home/username/.ssh/known_hosts location or else you can use the following command to remove the entry. It is also possible that a host key has just been changed. In that way, remote host identification has changed warning is saving us from trouble. This will open a new Nano instance and display the keys within your known_hosts file: You should delete the key causing the Warning: Remote host identification has changed error, then save your changes. by daves, june 25, 2014 in power pmac. Here is the simplest solution: ssh-keygen -R <host>. Host key verification failed. # ssh-keygen -R cupcake This happens to me now and then, and its very annoying, as Im usually in a hurry to fix something. How to Fix "WARNING: UNPROTECTED PRIVATE KEY FILE!" Alternately, you can run the ssh-keygen as root, but you will need to specify the known_hosts file reported in the error. Host key verification failed. By deleting this line, your SSH client won't have an ECDSA key fingerprint to compare to, and thus will ask you again to verify the authenticity of the server the next time you connect. WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED. The results will be the same, so we advise you to choose whichever option is more comfortable (and budget-friendly). The connections you use to log into servers need your utmost attention. * * The WordPress HTTP API allows us to connect to third party APIs like Twitter, Facebook, Mailchimp and more. The simplest solution to get rid of this warning is to remove the old identity of the remote server so that we can store the new identity of the remote server. Web security isnt just about installing plugins and creating a strong password. The Warning: remote host identification error typically occurs when the unique fingerprint of your server does not match what was stored in your known_hosts file when you first connected. ssh-keygen -R hostname/ipaddress Step 3 Try reconnect again --- The authenticity of host 'switch1 (192.168.1.101)' can't be established. 17 June 2018, [{"Product":{"code":"SWG10","label":"AIX"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Component":"Network communications","Platform":[{"code":"PF002","label":"AIX"}],"Version":"Version Independent","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}], ssh fails with "Warning: Remote Host Identification Has Changed! It aims at ensuring that your connection, and therefore all data passed, is free from eavesdropping. Do you want to remove [xx.xxx.xx.xxx]:xxxxxx from known hosts? Please contact your system . @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! Are you sure you want to continue connecting (yes/no)? Follow the steps below. Resolving The Problem Remove all the item of the issue compute node, including the bmc and all net interface. ssh-keygen -R hostname ssh-keygen -R ipaddress ssh-keygen -f "/home/ec2-user/.ssh/known_hosts" -R "192.168..106" Solution #2: Add correct host key in /home/user/.ssh/known_hosts It is not necessary to delete the entire known_hosts file, just the offending line in that file. ************************************************************** It is also possible that a host key has just been changed. This is done after first connecting to the server, and will prompt you with a message like this: -bash-4.1$ ssh root@10.49.100.73. . Add correct host key in /home/roberto/.ssh/known_hosts to get rid of this message. QSPIQuad SPI6spi $, Modified date: Learn more in this guide , A Complete Guide to WordPress Debugging (Enable WP_DEBUG + Other Tools), How to Fix the Leverage Browser Caching Warning in WordPress, A Guide To HTTP And The WordPress HTTP API Part 2. eg: ssh-keygen -R "basezap.com". If the related public host key stored in known_hosts, or the equivalent component, no longer matches the SSH host key on your server: the above warning, or a similar warning for your software of choice, will be displayed. Follow the steps below. @@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! The keys sit in the Registry, although they perform the same purpose as OpenSSH. If you are confident that the host key changed for a known reason (i.e. QSPIQuad SPI6spi The host is unknown. Ever seen this error? d7:3b:a3:5b:88:d2:f4:96:80:0d:8e:a0:8d:44:a2:d2. REMOTE HOST IDENTIFICATION HAS CHANGED! Get a personalized demo of our powerful dashboard and hosting features. Find and highlight the entry that is having the issue. 8. Close the window and click Save on the following prompt: Do you want to save the changes made to the document known hosts? From the ssh-keygen man page: -R hostname Removes all keys belonging to hostname from a known_hosts file. RSA key fingerprint is d7:3b:a3:5b:88:d2:f4:96:80:0d:8e:a0:8d:44:a2:d2. If this was helpful or you had a problem, leave a comment below. It is also possible that the RSA host key has just been changed. The authenticity of host 'cupcake (127.0.0.1)' can't be established. * * This scenario is exactly what the "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!" Or, create an account for $20 off your first month of Application Hosting and Database Hosting. You can do this in whatever way youre comfortable, but the quickest way is to type the apps name into Windows search bar: Here, look for the following destination within regedit: Youll see a list of entries here relating to the saved connections on your computer. Learn more , Ever seen this error? @@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! Offending RSA key in /root/.ssh/known_hosts:189 RSA host key for 10.101.6.11 has changed and you have requested strict checking. The fingerprint for the RSA key sent by the remote host is SHA256:eYTtqNXZHMS . Please contact your system administrator. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Read on to learn how! You can open this with Notepad (or your favorite text editor). For example, ssh-keygen -R 192.168.3.10. body a.novashare-ctt{display:block;background:#00abf0;margin:30px auto;padding:20px 20px 20px 15px;color:#fff;text-decoration:none!important;box-shadow:none!important;-webkit-box-shadow:none!important;-moz-box-shadow:none!important;border:none;border-left:5px solid #00abf0}body a.novashare-ctt:hover{color:#fff;border-left:5px solid #008cc4}body a.novashare-ctt:visited{color:#fff}body a.novashare-ctt *{pointer-events:none}body a.novashare-ctt .novashare-ctt-tweet{display:block;font-size:18px;line-height:27px;margin-bottom:10px}body a.novashare-ctt .novashare-ctt-cta-container{display:block;overflow:hidden}body a.novashare-ctt .novashare-ctt-cta{float:right}body a.novashare-ctt.novashare-ctt-cta-left .novashare-ctt-cta{float:left}body a.novashare-ctt .novashare-ctt-cta-text{font-size:16px;line-height:16px;vertical-align:middle}body a.novashare-ctt .novashare-ctt-cta-icon{margin-left:10px;display:inline-block;vertical-align:middle}body a.novashare-ctt .novashare-ctt-cta-icon svg{vertical-align:middle;height:18px}body a.novashare-ctt.novashare-ctt-simple{background:0 0;padding:10px 0 10px 20px;color:inherit}body a.novashare-ctt.novashare-ctt-simple-alt{background:#f9f9f9;padding:20px;color:#404040}body a.novashare-ctt.novashare-ctt-simple-alt:hover,body a.novashare-ctt.novashare-ctt-simple:hover{border-left:5px solid #008cc4}body a.novashare-ctt.novashare-ctt-simple .novashare-ctt-cta,body a.novashare-ctt.novashare-ctt-simple-alt .novashare-ctt-cta{color:#00abf0}body a.novashare-ctt.novashare-ctt-simple-alt:hover .novashare-ctt-cta,body a.novashare-ctt.novashare-ctt-simple:hover .novashare-ctt-cta{color:#008cc4}A secure internet connection is not just the ideal it's essential While it may be annoying, this error protects your connection from attacks. I prefer using an app, as its quick and easy. Its sort of like a Secure Sockets Layers (SSL) handshake, and in fact, there are some high-level similarities between SSH and SSL. Close the Registry Editor. Offending key in /Users/MYNAME/.ssh/known_hosts:3 RSA host key for MYIP has changed and you have requested strict checking. Someone could be eavesdropping on you right now (man-in-the-middle attack)! One common reason this key changes is because you have changed your root password or rebuilt your VPS server. Try our world-class support team! Someone could be eavesdropping on you right now (man-in-the-middle attack)! Search for hostname or IP on the file and delete the line. Are you sure you want to permanently delete this value? RSA host key for cupcake has changed and you have requested strict checking. This will add a file to the folder named "known_hosts copy" that ssh authentication will ignore. It's not always a bad thing (it's protecting your connection from malicious attacks! You can fix the problem by removing the IP address that you are trying to connect to from your ~/.ssh/known_hosts file. Youll notice that the error message references a known_hosts file. SSHWARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! The fingerprint for the ECDSA key sent by the remote host is SHA256:XXXXXXXXXXXXXXXXXXXXXXX. However, the SRX device still has the old RSA key fingerprint value for the remote host in its database at /cf/root/.ssh/known_hosts . The fingerprint for the RSA key sent by the remote host is SHA256:g38Q4Xc1UI4WcClY+GaohmhZSOHbgLo6+eYBFr0Iu6U. Inside will be a list of keys: Here, you can delete the key thats causing the problem, then resave the file. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! First, though, lets give you some more details on the error message itself. The "Warning: Remote host identification has changed" error protects your connection from certain malicious attacks, although in some cases, you can inadvertently cause the error too. @ @@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Issues with WordPress? You should now be able to connect to your website and or server again. @ Kinsta and WordPress are registered trademarks. Your job is to delete whichever one is causing an issue: Once you click on the Delete button, youll also need to confirm that you want to remove the key: Clicking Yes here means the key will be gone for good, and you shouldnt get the Warning: Remote host identification has changed error any longer. Its always annoying to run across errors like these. It is just a security notification that indicates the ECDSA host key for the given remote system has changed since you last connected. # ssh-keygen -R cupcake -f /home/myuser/.ssh/known_hosts On Windows, they dont have aknown_hostsfile, the information (IP address and credentials) is stored in the registry. No results were found for your search query. Please contact your system administrator. It is also possible that a host key has just been changed. To achieve this, open a Terminal window and run ssh-keygen, followed by your server hostname. Error - WARNING REMOTE HOST IDENTIFICATION HAS CHANGED This is actually not an error message. Its a command-line tool that lets you access an insecure network securely. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ The fingerprint for the ECDSA key sent by the remote host is SHA256:******. SPI, IC : Warning: Permanently added 'cupcake' (RSA) to the list of known hosts. It is also possible that a host key has just been changed. You should now be able to connect to your website and or server again. It is also possible that the RSA host key has just been changed. Over the next few minutes, were going to show you how to fix the Warning: Remote host identification has changed error for both Windows and Mac. If you create a ~/.ssh/config you can disable StrictHostKeyChecking. If youre on a tight budget, the free version is enough to manage yourknown_hostsfile. When you connect to a remote device over SSH, the SSH client first gets a "fingerprint" for an ECDSA key of the remote device. Remove the entry that is having the issue. Any existing connection history on your computer is meaningless. WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED. The second option is to clean up the entry from yourknown_hostsfile using the terminal. Someone could be eavesdropping on you right now (man-in-the-middle attack)! Get tutorials, guides, and dev jobs in your inbox. * Welcome to AIX Version 6.1! Below is a sample, the second item is for BMC network port. @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! . Save time, costs and maximize site performance with: All of that and much more, in one plan with no long-term contracts, assisted migrations, and a 30-day-money-back-guarantee. The error is related to your Secure Shell (SSH) keys and the server "fingerprint" a client will check for. You shouldnt attempt to fix the error unless you have complete confidence that the issue isnt malicious. Its important to note that Windows machines might not have a known_hosts file. This is called a man-in-the-middle attack. WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! I use the following (on my iMac) to disable ONLY for my local network (for which it is unnecessary). If you use PuTTY, the SSH key mismatch warning looks like the image below: In this case, click "Yes" if you know the reason for the key mismatch (IP address reassigned to another server, machine replaced, and so on).

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