Network error: Ubuntu ssh Connection Refused

I faced ubuntu connection refused error while establishing a connection to Ubuntu Linux virtual machine from host computer. I installed PuTTY on my host and tried to connect to Ubuntu Linux machine. Let’s check the IP of Ubuntu server that we had used to make connection from PuTTY terminal. Run ipconfig command to get these details.

#Check IP of Ubuntu Server
ipconfig

We can see the IP details of the Ubuntu server that is showing 192.168.209.134. We have used this IP to establish server connection and end up with this PuTTY fatal error.

I tried to connect to Ubuntu server post getting IP from above command but I got ubuntu ssh connection refused error during this operation. The details of PuTTY Fatal Error that caused ubuntu connection refused is given below.

Solution

We faced ubuntu ssh connection refused error and failed to connect to Ubuntu Server remotely using PuTTY terminal because SSH, or Secure Shell is not installed on the Ubuntu server. SSH, or Secure Shell, is a protocol used to securely log onto remote systems. Our next step is to install SSH on the Ubuntu server. Run below command to start this installation.

#Install SSH on Ubuntu Server
sudo apt-get install openssh-server

It will check the dependencies and ask you to type y to proceed with the installation as shown in below image.

A series of all required packages will download and set up to install SSH. Once SSH will be installed on your Ubuntu server it will look like below image.

You can also reconfirm the installation by executing same command which you ran to install it. You can say, it is saying newest version is already installed on this server.

Now launch PuTTY terminal on your host computer or a computer from where you want to connect to the Ubuntu server and enter IP address of Ubuntu server to establish connection. Once you click on connect button, you will get a window for the very first time only. Click on Yes button of that window to proceed. Once you will click on Yes button you will be connected to your Ubuntu server remotely.

Now we can see putty connection refused error is fixed and we can connect to Ubuntu server remotely using PuTTY terminal. If you want to change configurations of SSH you can refer to attached document. This way you can fix ubuntu ssh connection refused error.

Here, we have fixed ubuntu putty connection refused error. I hope you like this article. Please follow us on our facebook page and on Twitter handle to get latest updates.

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Network error: Connection timed out

I faced this issue during making connection to Linux virtual machine from PuTTY terminal that is running on host computer. I got below error during this operation. When i tried to ping the Linux virtual machine from host it was failed and shown request timeout.

I did some research over internet and found lot of solutions and reason behind this issue. Some people suggested to check and disable all firewalls and some has suggested some other solutions. Most of solutions have failed to fix this issue.

I discussed it with one of my friend who works in VMware domain, he suggested only one solution to check the IPs of host and virtual machine that should be part of same subnet. I apply his solution and it worked. Here i will explain the fix of this issue.

Let’s check the IP of local host on which Linux virtual machine is hosted. Run ipconfig command to get these details.

#Check Host IP
ipconfig

We can see the IP details of the host computer. We can see the range of IP is 192.168.209.1 & subnet mask is 255.255.255.0

Now we will check the IP of the Linux virtual machine which we generally give during the installation. Run ifconfig command on your Linux machine.

#Check Red Hat Linux Server IP
ifconfig

You can see the IP of this machine is 192.168.0.1 that belongs to different IP range. This is the main issue behind this error. Our next step to change the IP of Linux machine to same IP range under which host is running.

Solution

The solution of this issue is to change the IP of Linux machine to the same range on which local host is running. We can see the connection interface name is ens33 from above screenshot. Next step is to connect to Linux machine and set the new IP for this connection interface name. Run below command to get this done.

#Change the IP of connection interface name ens33 to 192.168.209.10.
sudo ifconfig ens33 192.168.209.10 netmask 2555.255.255.0

We can see command executed successfully. Now we can validate this change by running ifconfig again and you can see the IP is changed to 192.168.209.10 now.

Now we can go ahead and connect to this machine from host computer. Launch the PuTTY tool and enter the IP of the Linux virtual machine and click on open button as shown in below screen.

Once you click on open button, another window will come and ask you to choose Yes to proceed. Click on Yes button of this screen to proceed. Once you click on Yes button, you will get a login window which ask you to enter a correct login id and password to connect to Linux virtual machine. I did the same and you can see i have successfully connected to the Linux virtual machine from my host computer.

Now issue is fixed and you can do anything as per your requirement on the Linux virtual machine from your host computer using PuTTY terminal.

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