Configure access and security for instances¶

Add a rule to the default security group¶

This procedure enables SSH and ICMP (ping) access to instances. The rules apply to all instances within a given project, and should be set for every project unless there is a reason to prohibit SSH or ICMP access to the instances.

This procedure can be adjusted as necessary to add additional security group rules to a project, if your cloud requires them.

1. Log in to the dashboard, choose a project, and click Access & Security. The Security Groups tab shows the security groups that are available for this project.

2. Select the default security group and click Edit Rules.

3. To allow SSH access, click Add Rule.

4. In the Add Rule dialog box, enter the following values:

   Rule	Remote
   SSH	CIDR

   Note

   To accept requests from a particular range of IP addresses, specify the IP address block in the CIDR box.

5. Click Add.

   Instances will now have SSH port 22 open for requests from any IP address.

6. To add an ICMP rule, click Add Rule.

7. In the Add Rule dialog box, enter the following values:

   Rule	Direction
   All ICMP	Ingress

8. Click Add.

   Instances will now accept all incoming ICMP packets.

Add a key pair¶

Create at least one key pair for each project.

1. Log in to the dashboard, choose a project, and click Access & Security.
2. Click the Keypairs tab, which shows the key pairs that are available for this project.
3. Click Create Keypair.
4. In the Create Keypair dialog box, enter a name for your key pair, and click Create Keypair.
5. Respond to the prompt to download the key pair.

Import a key pair¶

1. Log in to the dashboard, choose a project, and click Access & Security.

2. Click the Keypairs tab, which shows the key pairs that are available for this project.

3. Click Import Keypair.

4. In the Import Keypair dialog box, enter the name of your key pair, copy the public key into the Public Key box, and then click Import Keypair.

5. Save the *.pem file locally.

6. To change its permissions so that only you can read and write to the file, run the following command:

   $ chmod 0600 yourPrivateKey.pem
   

   Note

   If you are using the dashboard from a Windows computer, use PuTTYgen to load the *.pem file and convert and save it as *.ppk. For more information see the WinSCP web page for PuTTYgen.

7. To make the key pair known to SSH, run the ssh-add command.

   $ ssh-add yourPrivateKey.pem
   

The Compute database registers the public key of the key pair.

The dashboard lists the key pair on the Access & Security tab.

Allocate a floating IP address to an instance¶

When an instance is created in OpenStack, it is automatically assigned a fixed IP address in the network to which the instance is assigned. This IP address is permanently associated with the instance until the instance is terminated.

However, in addition to the fixed IP address, a floating IP address can also be attached to an instance. Unlike fixed IP addresses, floating IP addresses can have their associations modified at any time, regardless of the state of the instances involved. This procedure details the reservation of a floating IP address from an existing pool of addresses and the association of that address with a specific instance.

1. Log in to the dashboard, choose a project, and click Access & Security.

2. Click the Floating IPs tab, which shows the floating IP addresses allocated to instances.

3. Click Allocate IP to Project.

4. Choose the pool from which to pick the IP address.

5. Click Allocate IP.

6. In the Floating IPs list, click Associate.

7. In the Manage Floating IP Associations dialog box, choose the following options:

   1. The IP Address field is filled automatically, but you can add a new IP address by clicking the + button.

   2. In the Ports to be associated field, select a port from the list.

      The list shows all the instances with their fixed IP addresses.

8. Click Associate.

   Note

   To disassociate an IP address from an instance, click the Disassociate button.

To release the floating IP address back into the pool of addresses, click the More button and select the Release Floating IP option.