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Managing Networks

Networks operations via GUI​

Internal Network and Subnetwork creation​

You can create a new internal network from the Network panel on Horizon.

Horizon offers you a quick way to do it from "Create Network" button Network > Networks > Create Network

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In the following steps of the wizard you must indicate the network name, the subnet name and additional configuration options for creating the network.

Step 1​

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Step 2​

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Step 3​

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After completing the steps we will have our new internal network that we can associate with instances.

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Networks operations via CLI​

Internal Network creation​

Type the following command to create an internal network in your project

$ openstack network create --internal <name>

Example:

$ openstack network create --internal nw_int_test

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Subnetwork creation​

Type the following command to create a subnet. You need to specify the internal network it will belong to and the DNS servers

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If you need to know what networks you have available in the project, use openstack network list

$ openstack subnet create --subnet-range <subnet-range> --network <`nw_int_projectname`> --dns-nameserver 172.26.100.102 --dns-nameserver 172.17.100.102 <name>

Example:

$ openstack subnet create --subnet-range 192.168.100.0/24 --network nw_int_test --dns-nameserver 172.26.100.102 --dns-nameserver 172.17.100.102 sn_test

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Managing Security Groups via GUI​

warning

Ensure that you review and modify security group rules according to your project's security requirements.

Create a Security Group​

You can create a new security group from the Network panel on Horizon.

Horizon offers you a quick way to do it from "Create Security Group" button Network > Security Group > Create Security Group

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Add Rules to a Security Group​

To allow specific traffic, you can add rules pushing "Add rule" button. For example, to allow SSH access

Step 1​

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Step 2​

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Result​

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Managing Security Groups via CLI​

warning

Ensure that you review and modify security group rules according to your project's security requirements.

Create a Security Group​

To create a new security group, use:

$ openstack security group create <name> --description "<description>"

Replace <name> with your desired name and <description> with a brief description.

List Security Groups​

To see all your security groups, run:

$ openstack security group list

Show Details of a Security Group​

To view details about a specific security group, use:

$ openstack security group show <group>

Replace <group> with the name or ID of the security group.

Add Rules to a Security Group​

To allow specific traffic, you can add rules. For example, to allow SSH access:

$ openstack security group rule create --proto tcp --dst-port 22 <group>

Delete a Security Group​

If you need to remove a security group, use:

$ openstack security group delete <group>