Welcome, Dev! It’s not uncommon to face errors and issues when working with servers. One of the most frustrating errors that you may encounter is the “Server’s host key has been rejected by user” error. This error can be a nightmare for anyone who relies on server access for their work. However, fret not! In this comprehensive guide, we will explain the error in detail and provide you with simple solutions to fix it.
Understanding the “Server’s Host Key has been Rejected by User” Error
Before we dive into the solutions, let us first understand what the error message means. This error usually occurs when you try to connect to a server through SSH or SFTP. SSH (Secure Shell) is a network protocol that allows secure access to a remote server. SFTP (Secure File Transfer Protocol) is an extension of SSH that provides a secure way to transfer files.
When you connect to a server for the first time, the server sends its public key to your computer. Your computer then stores this key in a file called “known_hosts”. This helps your computer identify the server the next time you try to connect to it. However, if the server’s public key changes, your computer will not recognize it, and you will encounter the “Server’s host key has been rejected by user” error.
The Possible Causes of the “Server’s Host Key has been Rejected by User” Error
There can be several reasons why you may encounter this error. Here are some of the most common ones:
Reason |
Description |
The server’s hostname or IP address has changed |
If the server’s hostname or IP address has changed, your computer will not recognize the server’s public key, and you will encounter the error. |
The server’s SSH or SFTP services have been reinstalled |
If the server’s SSH or SFTP services have been reinstalled, the server’s public key may have changed, leading to the error. |
Your computer’s “known_hosts” file has been deleted or modified |
If your computer’s “known_hosts” file has been deleted or modified, your computer will not be able to recognize the server’s public key, leading to the error. |
Solutions to Fix the “Server’s Host Key has been Rejected by User” Error
Solution 1: Remove the Server’s Public Key from Your Computer
If you are sure that the server’s public key has changed, you can remove the old key from your computer’s “known_hosts” file. Here’s how:
- Open your terminal or command prompt.
- Type the following command:
ssh-keygen -R <hostname or IP address>
- Replace <hostname or IP address> with the hostname or IP address of the server that you are trying to connect to.
- Press Enter.
- You should see a message that the old key has been removed.
- Try to connect to the server again.
Solution 2: Add the Server’s New Public Key to Your Computer
If the server’s public key has changed, you can add the new key to your computer’s “known_hosts” file. Here’s how:
- Open your terminal or command prompt.
- Type the following command:
ssh-keyscan <hostname or IP address> >> ~/.ssh/known_hosts
- Replace <hostname or IP address> with the hostname or IP address of the server that you are trying to connect to.
- Press Enter.
- You should see a message that the new key has been added to your “known_hosts” file.
- Try to connect to the server again.
Solution 3: Check Your Computer’s Firewall Settings
Sometimes, your computer’s firewall settings may prevent you from connecting to a server. Make sure that your firewall is not blocking the SSH or SFTP ports (port 22 for SSH and port 21 for SFTP). You can also try temporarily disabling your firewall and see if it fixes the error.
Solution 4: Contact Your Server Administrator
If none of the above solutions work, you may need to contact your server administrator for help. They may be able to identify the root cause of the error and provide you with a solution.
FAQs
Q1. Why am I getting the “Server’s host key has been rejected by user” error?
A1. You may be getting the error if the server’s public key has changed, or if your computer’s “known_hosts” file has been modified or deleted.
Q2. How do I fix the “Server’s host key has been rejected by user” error?
A2. You can fix the error by removing the server’s old public key from your “known_hosts” file, adding the server’s new public key to your “known_hosts” file, checking your firewall settings, or contacting your server administrator for help.
Q3. Can I prevent the “Server’s host key has been rejected by user” error?
A3. Yes, you can prevent the error by regularly updating your computer’s “known_hosts” file and ensuring that your computer’s firewall settings allow SSH and SFTP connections.
Conclusion
We hope that this guide has helped you understand the “Server’s host key has been rejected by user” error and provided you with simple solutions to fix it. Remember to regularly update your computer’s “known_hosts” file and ensure that your firewall settings allow SSH and SFTP connections to prevent the error from occurring in the future. If you have any further questions, feel free to leave them in the comments section below!
Related Posts:- What is Postico 2 and Why Does the Database Server Reject… Welcome, Devs, to this comprehensive guide on Postico 2 and how to solve the database server rejected password issue. Postico 2 is a popular PostgreSQL client for macOS that simplifies…
- Licenses are not Available for this Remote Desktop Host… Hello Dev, welcome to this journal article that discusses the causes and solutions of the error message "licenses are not available for this remote desktop host server." This error is…
- Fixing Lost Connection to Host Server Connection Timed Out… Hello Dev, have you ever experienced connecting to a server but encountering a "lost connection to host server connection timed out" error? This error message can be frustrating, especially if…
- PHP Unknown MySQL Server Host: A Comprehensive Guide for Dev Dear Dev, we understand how frustrating it can be when you encounter the "unknown MySQL server host" error in PHP. This error occurs when PHP is unable to connect to…
- Understanding the "Server's Host Key is not Cached in the… Greetings Dev! In today's digital age, servers play a crucial role in the smooth functioning of businesses. As a developer, you may have come across the "Server's Host Key is…
- Connection to server closed by remote host: What it means… Hello Dev, in this article, we will discuss one of the common errors that web developers often encounter while working with remote servers. We will explore what the "connection to…
- Fixing the "Server with Specified Host Name Cannot be Found"… Hi Dev, welcome to our guide on fixing the "Server with specified host name cannot be found" error on your web browser. This error message can be quite frustrating, especially…
- Understanding Unknown Server Host: A Comprehensive Guide for… Greetings, Dev! Have you been trying to access a particular website, but instead of loading, you receive an error message that reads "Unknown server host"? This error message can be…
- Connect to Message Server Host Failed - Troubleshooting… Greetings Dev! As a developer, you might have encountered the error message "Connect to Message Server Host Failed" while trying to connect to a message server host. This error can…
- Dealing with "MySQL Host not allowed to connect to this… Hello, Dev! Have you ever encountered the "MySQL host not allowed to connect to this server" error message? If yes, then you must have been struggling to find a solution.…
- The Server's Host Key Was Not Found in the Cache: Everything… Dear Dev, are you tired of encountering the server's host key not found in the cache error message? This error message can be frustrating and confusing, especially when you're trying…
- Django.db.utils.OperationalError could not connect to server… Greetings, Dev! Are you facing the issue of django.db.utils.OperationalError could not connect to server no route to host? If yes, then you have landed in the right place. In this…
- How to Fix "Minecraft Server Closed by Remote Host" Error Greetings, Dev! Are you experiencing the frustrating "Minecraft server closed by remote host" error? Don't worry, you're not alone. This error can happen for a variety of reasons, but luckily,…
- Understanding SQL Server Error 53 Dev, are you experiencing SQL Server error 53? It is an error that occurs when a connection to a SQL server is not established. This error is often caused by…
- Dealing with "either the server controller is not running on… Hello Dev! Are you facing issues with your server controller? Seeing the message "either the server controller is not running on host 2050" on your screen? Don't worry; we will…
- Minecraft Server No Route to Host Hello Dev, are you currently experiencing issues with a Minecraft server where you are unable to connect due to a "no route to host" error? This issue can be frustrating…
- Is the Server Running on Host? Greetings, Dev! As a developer or IT professional, you must have come across several technical issues while working with servers. One of the most common issues that you might encounter…
- How to Fix "Unknown MySQL Server Host 0" Error Hello Dev, have you ever encountered the "Unknown MySQL Server Host 0" error while using MySQL? If yes, then you know how frustrating it can be when you are trying…
- Lamp Server SMTP 554 Denied: Understanding and… IntroductionWelcome to our guide on Lamp Server SMTP 554 Denied. As web developers and website owners, we understand the importance of emails in our daily operations. Whether it’s sending newsletters…
- Fixing "Server with specified host name could not be found"… Welcome, Dev! Have you ever encountered a "server with specified host name could not be found" error while browsing the web? It can be a frustrating experience, especially if you're…
- Among Us 0 From Find Host Server Hello Dev! Are you a fan of the popular game Among Us? If so, you may have encountered issues when trying to find a host server. One of the most…
- Dealing with webpack-dev-server Invalid Host/Origin Header Hello Dev, we all know that webpack-dev-server is an excellent tool that allows you to develop your web applications more efficiently. However, it is not perfect, and you may encounter…
- Everything you need to know about "OperationalError 2005… Hello, Dev! Have you ever encountered the "OperationalError 2005 Unknown MySQL Server Host" error message while working on your website or application? If yes, then you know how frustrating it…
- Understanding the 550 5.1 2 Host Unknown Name Server Error… Dear Dev, have you ever encountered the error message “550 5.1 2 Host Unknown Name Server” while sending an email? This error message is common among email users, especially those…
- mkdir permission denied apache server Title: Understanding the Causes and Solutions for "mkdir Permission Denied" Error on Apache Server 🛠️🚫Introduction:Welcome to our guide on the "mkdir permission denied" error that you might encounter while working…
- Host Cannot Connect to MySQL Server: A Comprehensive Guide… Hello Dev, do you frequently encounter the error message "Host cannot connect to MySQL server"? This error message can be frustrating, especially when you are in the middle of a…
- Sudo Unable to Resolve Host Server Greetings, Dev! In this article, we will discuss one of the common errors that you might have encountered while using the sudo command in Linux. The error message that we…
- Warning: Forced Host Server PVP is Not Defined Hello Dev, are you having trouble with your Minecraft server? Have you encountered the error message "Forced Host Server PVP is Not Defined?" If so, don't worry. In this article,…
- 2005 Unknown MySQL Server Host – Causes and Solutions Hello Dev, welcome to this journal article about fixing the most common errors that arise when connecting to a MySQL database. One of the most puzzling issues that web developers…
- Apache Server Error after PHP: Causes, Solutions, and… Introduction Greetings, dear reader. In today's digital age, websites have become an integral part of every business around the world. Apache is an open-source, cross-platform web server software that powers…