Yes, it is very much safe to enable ssh on your ubuntu machine. On the transport layer, it uses TCP port 22. It is safe to enable SSH on Ubuntu MachineĪs you already know, SSH stands for Secure Shell and works on Layer 7 of the OSI Model. However, the configuration is different for all the firewalls. If you have a limited number of public IPs, you can also configure Port Forwarding on your Firewall. If you have a public IP, either you can assign that IP to your machine directly, otherwise, you need to configure your Firewall/Router. Once, you read this article, you will know that we must need a public IP to access the Ubuntu Machine from the Internet. How I can access a Ubuntu Machine Over the Internet?įirst, you need to understand the difference between Public IP and Private IP. Last login: Sun Apr 19 03:12:27 2020 from it! We successfully access the Ubuntu machine from a different remote machine.ġ. Once, you type the password of the Ubuntu host, you will get access to your remote ubuntu machine. Now, you need to enter the password of the Ubuntu machine you want to access. Warning: Permanently added ‘172.16.22.161’ (ECDSA) to the list of known password: The next output you get will be looks like the below output. Once, you press “Yes”, it will be permanently stored in the. Since we are connecting to this machine for the first time, so we need to press “Yes”. ssh output of this command will be looks like this below The authenticity of host ‘172.16.22.161 (172.16.22.161)’ can’t be established.ĮCDSA key fingerprint is SHA256:Y0VoJR0nxwYIMI8jpRijEWQk8SUKYzhTJLjsdvn3uwI.Īre you sure you want to continue connecting (yes/no)? So, the original command will be looks like the below command. ssh Replace USERNAME & UBUNTU_IP with actuall username and IP.Īs you already know, my ubuntu machine username is “gns3network” & the IP address is 172.16.22.161. You can refer to the below command for SSH using a terminal. You can directly access ubuntu using the terminal. Here, you do not need to install any ssh client. Now, we will access the Ubuntu machine from one of the remote Linux. However, you can enable SSH from the Windows Feature itself.Īccessing the Ubuntu Machine using Remote Linux Machine If you are using Windows System, you can download putty. Now, for accessing the Ubuntu machine, you need to use SSH Client depending on your Operating System. sudo ufw allow ssh Step 5: Accessing Ubuntu from the Remote Machine you can use the below command to allow ssh through it. Although, if you enabled UFW, you need to allow ssh through UFW. However, this firewall is disabled by default in ubuntu. This is the Host-Based Firewall which is in Ubuntu Operating System by default. Step 4: Allowing SSH from UFW (Firewall) on Ubuntu Machine In case you don’t know your machine IP, you just need to enter the below command to know the IP address. Now, you need to know the IP address of your ubuntu machine to access the remote machine. Now, we have successfully installed the “OpenSSH Server” or you can say open ssh service on the ubuntu machine. Step 3: Getting the Network details from the Ubuntu Machine The output of this command will be looks like the below image. You can use the below command, to check the status of the OpenSSH Server. By default, the SSH service will be enabled. Once, you Installed the OpenSSH Server package on your Ubuntu Machine, now you need to enable the SSH service on your machine. Step 2: Enable the Open SSH Service on Ubuntu Machine So, access the Ubuntu Terminal either using the Alt+Ctrl+T keyboard shortcut or you can click on the Terminal icon. To Enable SSH on Ubuntu, you need to install OpenSSH on the Ubuntu machine. Step 1: Install the OpenSSH Server on Ubuntu Machine Finally, we will access the ubuntu machine from the remote machine using an ssh client. Later, we enable SSH on the Ubuntu machine. First, we will download the OpenSSH Server. So, let’s start our configuration step by step. It is safe to enable SSH on Ubuntu Machine How I can access a Ubuntu Machine Over the Internet? Step 5: Accessing Ubuntu from the Remote Machine.Step 4: Allowing SSH from UFW (Firewall) on Ubuntu Machine.Step 3: Getting the Network details from the Ubuntu Machine.Step 2: Enable the Open SSH Service on Ubuntu Machine.Step 1: Install the OpenSSH Server on Ubuntu Machine.
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