How to Fix the SSH Connection Refused Error

Secure Shell (SSH) is an essential software for development. SSH allows advanced users access to major platforms and programs that can make programming, as well as other activities, simpler, quicker, and more efficient. For example, when you buy a Linux VPS hosting, the only way to access it is via SSH or PuTTY.

In case you decide to connect via SSH and get a “Connection rejected” error message, you could be worried. This is, however, an issue that is common, and there are ways to fix the SSH connection refused error in a few minutes of investigation.

In this article, we’ll talk about the basics of what SSH is and the best time you should use it, and how to fix connection refused errors.

 

What Is SSH?

Before we begin to tackle the issue, we’ll briefly go over the basics of what SSH is. Secure Shell (SSH) is the name of a protocol used in networks that can be utilized to connect to websites.

Simply put, it lets you connect your website with secure encryption even when you are on a network that is not secure. SSH is frequently compared to FTP/SFTP. It is an option to connect to your site. FTP (File Transfer Protocol) is a method of transferring files between computers using an IP/TCP network. The major problem the most with FTP is that it’s not encrypted. An attacker could hijack the connection and modify the files stored on the server.

In order to solve this issue, SFTP was invented. SFTP is Secure FTP or Secure Transfer Protocol or SSH File Transfer Protocol, which works in the same manner as standard FTP. It does so through a secure connection instead of an unsecured one.

For secure connections, SFTP uses SSH, which is a considerably more extensive technology. SFTP, therefore, runs “on the top over” SSH. Although FTP/SFTP can be used for the management of files, SSH allows you to perform a variety of additional activities. They include:

Remote command line: If you want to make use of the Command Line Interface (CLI) rather than the default GUI, it is possible to accomplish this using SSH. You can even enable your Astra license by using the command line!

Login: Are you locked out from your WordPress website? It is possible to use SSH to login.

Remote execution of commands: Do you want to run commands remotely on your server? It’s not a problem using SSH.

Make use of developer tools in WordPress: These include Git version control, WP-CLI, and package management tools that support PHP as well as JavaScript for JavaScript, to mention several.

Removing damaged or compromised files: If your site was compromised, use SSH to look at any newly modified files and determine the presence of malware.

In the end, FTP/SFTP serves as the method of moving and managing files from the server. SSH is a secure method of accessing the server.

 

What’s the SSH Connection Error?

If you’re trying to connect via SSH, then you’ll encounter the “connection failed” error is among the most frequent errors you’ll encounter. What exactly does this mean? Why can’t I connect to PuTTY and access my server?

Connect failed refers to exactly what it states. This means that the connection wasn’t able to work properly or your login credentials don’t match. There are many possible causes for the error. Let’s look at them.

• The problem is within your network: If your network has difficulties with performance, SSH could be affected as well, and SSH connection may be refused by port 22 in Ubuntu.
• The credentials you are using are not correct: If your hostname and username, password, or port are incorrect, SSH will not connect. When you buy Ubuntu VPS hosting, the hosting provider sends you an email with the necessary credentials to connect to your server; make sure you are using the correct ones.
• SSH cannot be in use: Even though SSH is usually pre-installed on servers, some special hosting plans require you to install it manually.
• SSH is not working: There are several motives for why SSH could be down, such as a DDoS attack or the volume of traffic.
• Security firewalls prevent access: It’s typical to find corporate offices, universities, and even schools to stop the use of port 22, which is the port used to connect SSH.

 

How to Fix the SSH Connection Refused Error in Linux

We’ll now look through various options. If you’re not certain which is more likely to succeed, start from the top, then work your way downwards.

 

1. Check your Network Connection

Although this might seem like common sense, it’s a good idea to take a look! Is your internet connection working effectively? Do you have the ability to access other websites with no problems? Are your websites loading properly?

Verify that everything functions in the way you expect it to.

Solution

If not, then there are some alternatives you might test. Try rebooting your router or your computer. If you can, test the connection by using a different area. The connection that is tethered to the Internet connection via your smartphone is an easy procedure to accomplish this.

Also, check if any other services on the internet, such as SFTP, work.

 

2. Check your Credentials

Is the connection working fine? Are your login credentials correct? Incorrect credentials are one of the main reasons why the connection won’t work.

Solution

There are many factors you’ll have to check that they are correct:

Host Name

The Host Name represents your full domain name (Fully-Qualified Domain Name, or FQDN) or your IP address. Unsure of the IP of your computer? Make use of this handy instrument.

Username

In order to create your username, you’ll need to enter the username of your FTP or SFTP. It is usually located in your Rackset hosting panel or within an email you received from your us at the time you bought your plan.

Password

The same applies to the password you use to access an FTP or SFTP login. If you are unable to locate it, search in your VPS hosting control panel.

 

3. Reboot Your Server

Are you using an exclusive server? Perhaps you actually manage your server?

Solution

Try restarting your server. It can usually fix problems with connectivity. Be sure that restarting your computer doesn’t cause any disruption to visitors if you’re running your website using it! If you are, we highly recommend you buy Ubuntu VPS hosting as soon as possible and host your web applications on it.

 

4. Ensure SSH is installed

In order for SSH to function, the system must have an application called a daemon running on the server that PuTTY is able to communicate with. It is a small program that monitors connections and accepts their credentials as long as they are authentic.

Most servers include this software, particularly if you’re working with a managed WordPress hosting provider. But, if you have a dedicated hosting account, then you might be required to install it on your own.

 

5. Check to see if SSH Works Correctly

In addition, it is necessary to install the daemon running for connecting via SSH. If the daemon isn’t working, it won’t allow you to connect to your server.

There are a variety of reasons the daemon may not be responding, for instance, hosting issues, DDoS attacks, or huge volumes of traffic.

Solution

In order to check if your daemon is operating, it is necessary to type the command to PuTTY. What command should you enter? Depends on the server you’re using as well as the Linux version it’s running. Linux is by far the most well-known operating system used by web hosting services.

Be aware it is important to note that the computer you are connecting to doesn’t belong to your personal computer. This is the server for your site, the site you’re connecting to.

If you receive an error code, chances are you have identified the cause of the problem. Solutions could include:

•     Make sure that your hostname is correctly spelled
•     Make use of the ping command to ensure that you have the ability to find your hostname on the client’s machine (the one you’re trying to connect to)
•     Monitoring firewall status and blocking ports
•     Restarting your daemon

 

6. Ports and Firewalls

If you’re trying to log in via the corporate campus of a university or another large institution, it’s likely that your firewall has blocked port 22. And this is the reason why the SSH connection refused port 22 on Ubuntu.

Solution

For a quick check if the port is working, try this program. Just add the domain name and make sure that port that port 22 is shown as the port, then hit the check button.

If the test of connection was successful, it indicates it is a problem with the connection or computer and not the port. Review the firewall’s rules, or talk to the administrator of the network you are using.

 

7. Get in Touch with your Host

Have you encountered any issues? You should contact your host! Most likely, they will assist with your request.

Or it might be a totally different error like “ERR_CONNECTION_REFUSED”, So you have to check this possibility as well.

 

Conclusion

SSH is an incredibly powerful technology, and the process of learning how to utilize it can be a worthwhile investment of time. SSH lets you connect to your website securely, control the files and processes, and perform many additional useful things.

We hope you’ve gotten rid of your “Connection Refused” error by following this tutorial. Although this issue can be confusing, it’s actually not that difficult to solve. All you have to do is perform some of the tests mentioned earlier.

Common Causes of SSH Connection Refused

Understanding the common reasons behind an SSH connection refused error can help you troubleshoot more effectively. Here are some typical causes:

• Incorrect IP Address or Hostname: Ensure that you are connecting to the correct server IP address or hostname.
• SSH Daemon Not Running: Verify that the SSH service is active on the server.
• Firewall Restrictions: Check if a firewall is blocking the SSH port (default is 22).
• Port Changes: If the SSH port has been changed from the default, ensure you are using the correct port.

Steps to Resolve SSH Connection Refused

Follow these steps to troubleshoot and fix the SSH connection refused error:

1. Check SSH Service Status: Use systemctl status sshd to verify if the SSH service is running.
2. Verify Firewall Settings: Use firewall commands like ufw status or iptables -L to ensure port 22 is open.
3. Confirm Port Configuration: Check the SSH configuration file /etc/ssh/sshd_config for the correct port number.
4. Check Server Logs: Review logs in /var/log/auth.log or /var/log/secure for any error messages.

Diagnosing SSH Connection Issues

Diagnosing an SSH connection issue involves analyzing various factors. Here’s a quick comparison of potential problems and solutions:

Issue	Solution
Wrong Credentials	Ensure username and password or key file are correct.
Network Issues	Check network connectivity and DNS settings.
Server Overload	Reduce server load or upgrade resources.

FAQ

What does SSH connection refused mean?

SSH connection refused indicates that your client cannot establish a connection to the server, often due to incorrect settings or network issues.

How do I check if SSH is running on my server?

Use the command systemctl status sshd to check if the SSH service is active and running on your server.

Can a firewall block SSH connections?

Yes, firewalls can block SSH connections if the necessary port (default 22) is not open. Ensure that your firewall settings allow SSH traffic.

For a seamless SSH experience, consider upgrading to a VPS hosting solution with Rackset, offering enhanced performance and security.

Advanced SSH Configuration for Enhanced Security

Securing your SSH connection is crucial to prevent unauthorized access. Implementing advanced SSH configurations can help mitigate the risk of connection refusals due to security settings. Here are some best practices:

• Disable Root Login: Modify the SSH configuration file to prevent root login. This reduces the risk of brute force attacks on the root account. Edit /etc/ssh/sshd_config and set PermitRootLogin no.
• Use SSH Key Authentication: Replace password-based authentication with SSH key-based authentication for stronger security. Generate a key pair using ssh-keygen and add the public key to the ~/.ssh/authorized_keys file on the server.
• Change Default Port: Changing the default SSH port from 22 to a non-standard port can reduce the likelihood of automated attacks. Update the Port directive in /etc/ssh/sshd_config.

Common Network Issues Leading to SSH Connection Refused

Network-related issues can often lead to SSH connection refusals. Understanding these problems can help in troubleshooting effectively:

• Firewall Restrictions: Ensure that the server’s firewall is configured to allow incoming SSH connections. Check both the server’s firewall and any external firewalls or network security groups.
• IP Address Changes: If the server’s IP address has changed, update the DNS records or use the new IP address to establish the connection. Verify the server’s IP using ifconfig or ip addr.
• Network Congestion: High network traffic can cause timeouts and connection refusals. Use network monitoring tools to identify and alleviate congestion issues.

Using SSH Logs for Troubleshooting Connection Issues

SSH logs provide valuable insights into connection problems. By examining these logs, you can pinpoint the root cause of SSH connection refusals:

On most Linux systems, SSH logs are located in /var/log/auth.log or /var/log/secure. Use the tail command to view the latest entries:

sudo tail -f /var/log/auth.log

Look for specific error messages that can indicate the nature of the problem, such as incorrect credentials, permission issues, or network errors. This information can guide you in resolving the issue efficiently.

Comparing SSH with Alternative Remote Access Protocols

While SSH is a popular choice for secure remote access, it’s worth comparing it with other protocols to understand its advantages:

Protocol	Security	Use Case
SSH	Strong encryption, supports key-based authentication	Secure remote server management
Telnet	No encryption, vulnerable to interception	Legacy systems, internal networks
RDP	Encryption available, but less secure than SSH	Windows-based remote desktop access
VNC	Encryption can be added, less secure by default	Graphical desktop sharing

SSH stands out for its robust security and versatility, making it the preferred choice for most remote server administration tasks. However, understanding the alternatives can help you choose the right tool for specific scenarios.