Ssh could not resolve hostname aws ec2

PuTTY installed in local machine. Using Amazon EC2 eliminates your need to invest in hardware up front, so you can develop and deploy applications faster. Amazon EC2 allows us to get compute power in cloud through the launching of virtual servers called instances. When you launch an instance, you can make use of the compute as you wish, just as you would with an on-premises server. Because you are paying for the computing power of the instance, you are charged per hour while the instance is running.

When you stop the instance, you are no longer charged. This is how EC2 Home page looks like. This is the place we land when we click EC2 link in the previous step Figure 1. Figure 1. This will start the instance creation wizard which will guide us through the following steps mainly: Selecting an OS Choosing the size of your virtual server Choosing the Extra attached storage we need for this instance Configuring details Reviewing your input and selecting a key pair for SSH Select AMI ā€” AMI stands for Amazon Machine Imageswhich is kind of a blue print of the instance that we will create, it tells about the Operating System of the Instance as well as the basic softwares that will be pre-installed.

So in this step, while choosing AMI, we are choosing the underlying Operating System OS and the preinstalled software bundles that would be available in the instance upfront. We need to choose AMI based on our need.

An AMI is the basis your virtual server starts from. We can also create custom AMI based on our need. Some AMIs are chargeable. Here for this exercise we will choose Ubuntu Server Figure 3. Instance Type indicates the computing power of the instance by allocating the amount of virtual hardware dedicated to the instance. On AWS, computing power is classified into instance types.

An instance type primarily describes the number of vCPUs and the amount of memory an instance will be allocated to once created. AWS has already defined many instance typeswe will now choose the t2. Once instance type is selected, click on button Next: Configure Instance Details in the bottom right corner of the page to proceed with the next steps. Figure 4. Here we will take all the default values and proceed with clicking Next: Add Storage button at the bottom right corner of the page.

Before proceeding to the next section please note few important things that we can modify here: Number of Instances we are going to create in this wizard. We can select the Spot Instance option, Spot Instances are idle compute capacity that AWS makes available based on bid prices from customers.

VPC is itself a large topic which is out of scope of this article. Please follow official AWS documentation for the same. Here some of them are chargeable option. We can Change those later also once the Instance has been created. Configure Instance Details screen will look like.

Figure 5. It is basically network-attached storage attached your virtual server. This page will help us to configure Storage that will be associated with the EC2 instance that we are going to launch. We will choose default values to avoid extra cost. Make sure you choose the capacity which falls under Free Tire Eligibility to avoid incurring extra cost.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. Now those hostnames will resolve. Note: Just copying the. You will also need to extract the public key from the key pair. The following command will extract the public key.

How to SSH to EC2 Linux Instance using PuTTY

Then "append" the contents of the public key to. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.

Could not resolve hostname datanode1: Name or service not known Ask Question. Asked 1 year, 7 months ago. Active 1 year, 7 months ago. Viewed 2k times. Salman Dalal Salman Dalal 3 3 bronze badges. You could add -v to your scp command. That should bring up a line similiar to Where do you issue your scp command?If you've got a moment, please tell us what we did right so we can do more of it. Thanks for letting us know this page needs work. We're sorry we let you down. If you've got a moment, please tell us how we can make the documentation better.

A DNS hostname is a name that uniquely and absolutely names a computer; it's composed of a host name and a domain name. We provide an Amazon DNS server. When you launch an instance into a default VPC, we provide the instance with public and private DNS hostnames that correspond to the public IPv4 and private IPv4 addresses for the instance.

An Amazon-provided private internal DNS hostname resolves to the private IPv4 address of the instance, and takes the form ip- private-ipv4-address. You can use the private DNS hostname for communication between instances in the same network, but we can't resolve the DNS hostname outside the network that the instance is in.

A public external DNS hostname takes the form ec2- public-ipv4-address. We resolve a public DNS hostname to the public IPv4 address of the instance outside the network of the instance, and to the private IPv4 address of the instance from within the network of the instance. If this attribute is truequeries to the Amazon provided DNS server at the If either or both of the attributes is set to falsethe following occurs:. If you are not using the Amazon-provided DNS server, your custom domain name servers must resolve the hostname as appropriate.

Each EC2 instance limits the number of packets that can be sent to the Amazon-provided DNS server to a maximum of packets per second per network interface.

This quota cannot be increased. The number of DNS queries per second supported by the Amazon-provided DNS server varies by the type of query, the size of response, and the protocol in use. You can view the DNS hostnames for a running instance or a network interface using the Amazon EC2 console or the command line.

You can use one of the following commands. Review the information in the Description tab. In this example, both settings are enabled. In the dialog box that opens, choose Yes or Noand then choose Save. A private hosted zone is a container that holds information about how you want to route traffic for a domain and its subdomains within one or more VPCs without exposing your resources to the Internet.

For example, if you want browser requests for example. From your instance, you can test that your resource in your private hosted zone is accessible from its custom DNS name by using the ping command; for example, ping mywebserver. You must ensure that your instance's security group rules allow inbound ICMP traffic for the ping command to work.

Otherwise, private hosted zones do not support transitive relationships outside of the VPC; for example, you cannot access your resources using their custom private DNS names from the other side of a VPN connection.

Javascript is disabled or is unavailable in your browser. Please refer to your browser's Help pages for instructions. Did this page help you? Thanks for letting us know we're doing a good job! In the navigation pane, choose Instances. Select your instance from the list. To view DNS hostnames for an instance using the command line You can use one of the following commands. In the navigation pane, choose Network Interfaces.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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I am on windows 10 machine. I need to ssh to our Bastion and then do port forwarding to connect to AWS instance. I have a config file that I use to ssh.

My config file is as following:. I solved it. I recreated my private key and i moved to. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 1 year, 10 months ago. Active 1 year, 1 month ago. Viewed 3k times. HBruijn Salah Salah 21 1 1 silver badge 4 4 bronze badges. Active Oldest Votes.

It looks like a dns issue. To figure out, try in cmd. Then you have two option : add myhostname in your dns server Or add myhostname 1.

ssh could not resolve hostname aws ec2

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ssh could not resolve hostname aws ec2

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Using DNS with Your VPC

The following are possible problems you may have and error messages you may see while trying to connect to your instance. Check your security group rules. You need a security group rule that allows inbound traffic from your public IPv4 address on the proper port.

In the navigation pane, choose Instancesand then select your instance. In the Description tab at the bottom of the console page, next to Security groupsselect view inbound rules to display the list of rules that are in effect for the selected instance.

For Linux instances: When you select view inbound rulesa window will appear that displays the port s to which traffic is allowed. Verify that there is a rule that allows traffic from your computer to port 22 SSH. For Windows instances: When you select view inbound rulesa window will appear that displays the port s to which traffic is allowed.

Verify that there is a rule that allows traffic from your computer to port RDP. Each time you restart your instance, a new IP address and host name will be assigned. If your security group has a rule that allows inbound traffic from a single IP address, this address may not be static if your computer is on a corporate network or if you are connecting through an internet service provider ISP.

Instead, specify the range of IP addresses used by client computers. If your security group does not have a rule that allows inbound traffic as described in the previous step, add a rule to your security group. Check the route table for the subnet. In the navigation pane, choose Internet Gateways. Verify that there is an internet gateway attached to your VPC.

Otherwise, choose Create Internet Gateway to create an internet gateway. In the navigation pane, choose Subnetsand then select your subnet. On the Route Table tab, verify that there is a route with 0. Otherwise, do the following:. Choose the ID of the route table rtb- xxxxxxxx to navigate to the route table. On the Routes tab, choose Edit routes.

Choose Add routeuse 0. Check the network access control list ACL for the subnet. The network ACLs must allow inbound and outbound traffic from your local IP address on the proper port. The default network ACL allows all inbound and outbound traffic.

In the navigation pane, choose Subnets and select your subnet.If you've got a moment, please tell us what we did right so we can do more of it. Thanks for letting us know this page needs work.

We're sorry we let you down. If you've got a moment, please tell us how we can make the documentation better. After you launch your instance, you can connect to it and use it the way that you'd use a computer sitting in front of you. The following instructions explain how to connect to your instance using an SSH client.

If you receive an error while attempting to connect to your instance, see Troubleshooting Connecting to Your Instance. After you launch an instance, it can take a few minutes for the instance to be ready so that you can connect to it. Check that your instance has passed its status checks. You can view this information in the Status Checks column on the Instances page. Your local computer might have an SSH client installed by default.

You can verify this by typing ssh at the command line. If your compute doesn't recognize the command, you can install an SSH client. Use the following procedure to connect to your Linux instance using an SSH client. In a terminal window, use the ssh command to connect to the instance. You specify the path and file name of the private key.

To connect to your instance, do one of the following:. IPv6 Alternatively, if your instance has an IPv6 address, to connect using your instance's IPv6 address, enter the following command.

Optional Verify that the fingerprint in the security alert matches the fingerprint that you previously obtained in Optional Get the Instance Fingerprint. If these fingerprints don't match, someone might be attempting a "man-in-the-middle" attack.

ssh could not resolve hostname aws ec2

If they match, continue to the next step. One way to transfer files between your local computer and a Linux instance is to use the secure copy protocol SCP.

This section describes how to transfer files with SCP. The procedure is similar to the procedure for connecting to an instance with SSH. Verify the general prerequisites for transferring files to your instance. The general prerequisites for transferring files to an instance are the same as the general prerequisites for connecting to an instance. The following procedure steps you through using SCP to transfer a file.

If you've already connected to the instance with SSH and have verified its fingerprints, you can start with the step that contains the SCP command step 4. Transfer a file to your instance using the instance's public DNS name.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

AWS ec2 describe-instances without have to use credentials

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm trying login from local machine to aws ubuntu server but I'm unable to login on aws ubuntu server with hostname.

If you are own a domain, you can set the public IP of your server to myserver. Learn more. Ubuntu ssh: Could not resolve hostname myserver: Name or service not known Ask Question. Asked 8 months ago. Active 8 months ago. Viewed 3k times.

Please help me. Rajeev Rajeev 3 1 1 silver badge 5 5 bronze badges. Active Oldest Votes. The problem is, that your local computer do not know myserver. So you have several option: 1. You can also set myserver in.

Thomas Thomas 3 3 silver badges 12 12 bronze badges. Hi Thomas, Thank you for reply. I followed the first step now I'm able to login. Thanks again. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Unfriendly Robot: Automatically flagging unwelcoming comments.

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