Firewalls#

This guide explains how firewall rules work on the myDelska platform and how to create rules for a single virtual machine or apply a firewall policy to multiple VMs at once.

What details are provided in the Firewall section?#

The Firewall section of the Dashboard lists your existing firewall policies (if any) and lets you create new inbound or outbound policies.

What is the difference between a shared and a private firewall?#

A shared firewall hosts many users, while a private firewall is a dedicated service provided to a single user. A shared firewall comes with specific predefined controls; a private firewall offers more customization options and enhanced security.

What are inbound and outbound firewall rules?#

• Inbound rules control incoming traffic on the specified port.
• Outbound rules control outgoing traffic on the specified port.

Traffic that does not match a rule is blocked: assigning a port allows connections on that port and blocks all other traffic in that direction.

Where can I see my firewall rules?#

Firewall rules can be managed in two places:

• Dashboard » Firewall — create rules and reusable policies and apply them to the VMs in your Workspace.
• Dashboard » Instances » your VM » Firewall — view and edit the rules of that specific VM.

You can also see them in the Network Topology overview.

How to set up a firewall for a virtual machine (VM)#

To set up firewall rules for a single VM, follow the steps below:

1. Choose the virtual machine in the Dashboard.
2. Go to the Firewall section.
3. Choose to create Inbound or Outbound rules.
4. Click New rule.
5. Choose the protocol/service for the rule.
6. Set the Action, Protocol, Port, and Source/Destination IP or Network.

The example below shows a firewall rule set that allows HTTP and HTTPS from any source IP (the Internet) — all other network traffic is blocked:

Open the Firewall section in myDelska to configure your rules.

How to create a reusable firewall policy#

As a second option, you can apply firewall rules from a predefined firewall policy:

1. In the Dashboard Firewall section, create a New policy.
2. Choose an Inbound or Outbound policy.
3. Define the firewall rule criteria (Action/Protocol/Port/Source or Destination IP/Network).
4. Save the policy.

How to apply a firewall policy to multiple VMs#

1. In the Dashboard Firewall section, choose the predefined firewall policy.
2. Select the VMs.
3. Click Apply.

Please note: The applied policy will overwrite any custom rules the selected VMs may have set!

Next steps#

• Review your network topology
• Set monitoring alerts for your VMs
• Connect to your VM with SSH

Open in myDelska Platform#

Open Firewall in myDelska to create rules and policies for the Workspace, or open a VM's Firewall tab directly.