To block a port using UFW, you need to use ufw deny followed by the port number, then optionally the protocol.

UFW stands for uncomplicated firewall and comes pre-installed with all of the latest releases of Ubuntu and Ubuntu Server.

It is one of the easiest ways to set up a firewall on your device or server quickly.

Firewalls are an integral part of maintaining strong network security and are crucial for servers.

In this guide, we will show you how you can use UFW to allow, deny, or rate-limit the ports on your device.

It should be noted that by default UFW will block all incoming connections.

Open Port Check V6 How To Allow Access

Table of Contents Using UFW to Allow Access Through a Port Allowing Access Through a Port using UFW Specifying the Protocol for the Port to be Allowed On Allowing Access by Specifying a Service Name Allowing Access for a Specific IP Address Allowing Complete Access for a Certain IP Address Allowing Access to a Port for a Certain IP Address Denying Access Through Ports using UFW Denying Access Through a Port Denying Access Through a Port with a Specific Protocol Denying Access by using a Service Name Deny Access to a Specific IP Address Deny Complete Access to a Specific IP Address Deny Access through a Port to a Specific IP Address Rate Limiting Connections on a Port Deleting Existing Firewall Rules Deleting Using a known Firewall Rule Deleting Using the Rule Number Getting the Status of UFW Listing UFW Rules While Disabled How to Enable or Disable UFW Enabling UFW Disabling UFW Using UFW to Allow Access Through a Port One of the very first things you should learn to deal with is how to allow access through an individual port.

By allowing a port within UFW, connections will be able to be made through it.

This allows other devices to connect to yours through your network.

Using UFW, allowing a port is a straightforward process that requires one command.

Optionally you can also specify the protocol that the port should be allowed on, whether that be TCP, UDP, or another protocol.

If you dont specify a protocol, the port will be accessible through all available protocols.

Allowing Access Through a Port using UFW At its most straightforward usage, all you need to do it specify the port number you want traffic to be allowed through.

By specifying the protocol, you will not be able to access it using any other protocol.

For example, suppose we only wanted our SSH port to be accessible through the TCP protocol.

For example, if we wanted to allow access to SSH using UFW, we can run the following command.

Open Port Check V6 Full Access To

You can either allow the IP address to have full access to your device or only to a specific IP address.

This method uses a different syntax to allowing global access through a port.

Allowing Complete Access for a Certain IP Address The easiest way of specifying access for an IP address is to give it complete access to your device.

This isnt the best practice for security, as they would have a way of completely bypassing your firewall.

You can also optionally use this to specifying the protocol you want it to have access to.

Denying connections through a port using UFW is a very straightforward process.