Azure port connectivity is a game-changer for businesses looking to scale their operations. With Azure port, you can easily connect multiple networks and devices, making it easier to manage and secure your infrastructure.
One key benefit of Azure port is its ability to support up to 256 network interfaces, giving you the flexibility to scale your network as needed. This is especially useful for businesses that need to accommodate growing traffic or new applications.
By using Azure port, you can also create a virtual network hub that connects multiple locations and devices, making it easier to manage and troubleshoot your network. This can help reduce downtime and improve overall network performance.
Azure port also supports advanced features like network virtualization and load balancing, which can help improve network efficiency and reduce costs.
What is Azure Port
Azure Port is a managed service that enables developers to create and manage network resources in a cloud-based environment. It provides a centralized platform for managing network infrastructure.
Azure Port supports multiple networking protocols, including IPv4 and IPv6, allowing for flexibility and compatibility with various network configurations.
Azure Port is integrated with other Azure services, such as Azure Virtual Network and Azure Load Balancer, to provide a comprehensive networking solution.
Opening Ports
To open ports on your Azure Virtual Machine (VM), you'll need an Azure account with the right permissions, an existing Azure VM, and basic knowledge of the Azure portal navigation.
You can open ports by following these steps:
1. In the left-hand menu, click on "Virtual Machines".
2. Select the VM for which you want to open a port from the list of available VMs.
3. In the "Networking" blade, click on "Add inbound port rule".
4. Fill in the details for the inbound port rule.
You can open ports 80 (HTTP) and 443 (HTTPS) for specific IP addresses by entering the following details:
You can also open ports for any IP addresses by setting the source to "Any" and the destination port ranges to 80 and 443.
Ensure the inbound port rules are listed in the Networking settings of the VM, and you can verify the rules by attempting to access the VM through the newly opened ports.
Port Configuration
To open ports on your Azure Virtual Machine, you'll need an Azure account with the right permissions to manage network settings, an existing Azure Virtual Machine, and some basic knowledge of the Azure portal navigation.
You'll start by clicking on "Virtual Machines" in the left-hand menu and selecting the VM you want to open a port for from the list of available VMs.
To add an inbound port rule, click on "Networking" and then "Add inbound port rule" in the Networking blade.
You'll need to fill in the details for the inbound port rule, including source IP addresses or CIDR ranges, destination port ranges, and protocol. For example, to open ports 80 (HTTP) and 443 (HTTPS) for specific IP addresses, you'll enter the IP address or CIDR range in the "Source IP addresses/CIDR ranges" field.
Here are the specific details you'll need to enter for ports 80 (HTTP) and 443 (HTTPS) for specific IP addresses:
Alternatively, you can open ports 80 (HTTP) and 443 (HTTPS) for any IP address by selecting "Any" in the "Source" field and leaving the other details the same.
Once you've added the inbound port rule, it will appear in the list of inbound port rules and take effect immediately. You can verify the rule by attempting to access the VM through the newly opened ports.
Benefits and Scaling
Azure Bastion offers several key benefits that make it a game-changer for secure remote access to your virtual machines. You can get to your RDP and SSH sessions directly in the Azure portal using a single-click seamless experience.
Azure Bastion uses an HTML5-based web client that is automatically streamed to your local device, allowing your RDP/SSH session to be over TLS on port 443, which enables traffic to traverse firewalls more securely. This is a huge advantage over traditional methods, where you'd need to worry about managing public IP addresses and network security groups.
One of the most significant benefits of Azure Bastion is that it doesn't require a public IP address on your virtual machine, making it much more secure and easier to manage. This also means you don't need to apply any Network Security Groups (NSGs) to the Azure Bastion subnet, which removes the hassle of managing NSGs each time you need to securely connect to your virtual machines.
Here are some of the key benefits of Azure Bastion in a nutshell:
- No public IP address required on the Azure VM
- No hassle of managing Network Security Groups (NSGs)
- No need to manage a separate bastion host on a VM
- Protection against port scanning
- Hardening in one place only
- Protection against zero-day exploits
Azure Bastion also supports manual host scaling, allowing you to configure the number of host instances to manage the number of concurrent RDP/SSH connections. This means you can increase the number of host instances to support more concurrent sessions, or decrease it to reduce the number of supported sessions.
Key Benefits
Azure Bastion offers a seamless experience for accessing RDP and SSH sessions directly from the Azure portal with a single click.
This eliminates the need to manage a separate bastion host on a VM, as Azure Bastion is a fully managed platform PaaS service from Azure that is hardened internally to provide secure RDP/SSH connectivity.
Azure Bastion connects to your virtual machines over private IP, so you don't need a public IP address on your VM, reducing the hassle of managing Network Security Groups (NSGs) and making it easier to configure your NSGs to allow RDP/SSH from Azure Bastion only.
This approach also protects your VMs against port scanning by rogue and malicious users, as they don't need to be exposed to the internet.
Here are the key benefits of Azure Bastion at a glance:
Azure Bastion is also hardened to protect against zero-day exploits, keeping your virtual network secure and up to date.
Host Scaling
Host scaling is a powerful feature that allows you to manage the number of concurrent RDP/SSH connections Azure Bastion can support.
You can configure the number of host instances, also known as scale units, to control the number of concurrent sessions.
Increasing the number of host instances lets Azure Bastion manage more concurrent sessions, making it a great option for large-scale deployments.
Azure Bastion supports up to 50 host instances.
This feature is available for Standard SKU and higher, making it a valuable addition to your Azure Bastion setup.
By scaling your host instances, you can ensure that your Azure Bastion can handle the demands of your business, whether that's a small team or a large enterprise.
Frequently Asked Questions
What port does Azure use?
Azure uses port 443 and 22 for SFTP connections to Blob Storage accounts. For more information on setting up SFTP endpoints and authentication, click here.
Is port 25 open in Azure?
No, port 25 is blocked by default in Azure for security reasons. However, there are alternative ways to send email from Azure VMs.
Sources
- https://support.boldbi.com/kb/article/16188/add-inbound-port-in-azure-vm-for-bold-bi
- https://thomaslarock.com/2015/04/troubleshooting-azure-connectivity-ports-and-endpoints/
- https://learn.microsoft.com/en-us/azure/bastion/bastion-overview
- https://serverhealers.com/blog/open-ports-to-a-virtual-machine-in-microsoft-azure
- https://docs.megaport.com/api/api-vxc-azure/
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