How To Check Open Ports In Fortigate Firewall Cli?

**How To Check Open Ports In Fortigate Firewall Cli?**

In today’s interconnected world, it’s more important than ever to secure your network from unauthorized access. One of the most important steps in securing your network is to ensure that all ports are closed that are not necessary. This will help to prevent attackers from gaining access to your network and exploiting vulnerabilities.

Fortinet’s FortiGate firewalls are a powerful tool for securing your network. They offer a wide range of features to help you protect your network from a variety of threats. One of these features is the ability to check which ports are open on your firewall. This can be a useful tool for troubleshooting problems or for simply verifying that your firewall is configured correctly.

In this article, we will show you how to check open ports on a FortiGate firewall using the CLI. We will also provide a brief overview of the different types of ports that are used on a firewall.

What are Ports?

A port is a logical connection point that allows data to flow between two devices on a network. Each port is identified by a number, and each type of traffic uses a specific port number. For example, HTTP traffic uses port 80, and HTTPS traffic uses port 443.

When you connect to a website, your browser sends a request to the website’s server on port 80. The server then sends back a response, which is also sent on port 80. This process is repeated for each request and response.

Ports can be either open or closed. An open port means that the firewall is allowing traffic to flow through that port. A closed port means that the firewall is blocking traffic from flowing through that port.

How to Check Open Ports on a FortiGate Firewall

There are a few different ways to check open ports on a FortiGate firewall. The easiest way is to use the CLI. To do this, follow these steps:

1. Log in to the FortiGate firewall CLI.
2. Type the following command:

diag sys net show tcp

This command will display a list of all the TCP ports that are open on the firewall.

You can also use the GUI to check open ports. To do this, follow these steps:

1. Log in to the FortiGate firewall GUI.
2. Go to **Firewall** > **Policy & Objects** > Services.
3. Click the Add button.
4. In the Name field, type a name for the service.
5. In the Protocol field, select TCP.
6. In the Port field, type the port number that you want to check.
7. Click the OK button.

The new service will be added to the list of services. If the port is open, the service will be enabled. If the port is closed, the service will be disabled.

Port	Protocol	Description
22	TCP	SSH
80	TCP	HTTP
443	TCP	HTTPS

How to Check Open Ports in Fortigate Firewall CLI?

A firewall is a network security device that controls the incoming and outgoing traffic of a network. It is used to protect a network from unauthorized access and malicious activity. Fortigate is a popular brand of firewall that offers a wide range of features and capabilities. One of the features that Fortigate provides is the ability to check for open ports. This can be useful for troubleshooting network issues or for security purposes.

In this guide, we will show you how to check open ports in Fortigate Firewall CLI. We will cover the following topics:

• Connecting to the Fortigate Firewall CLI
• Listing the open ports on the Fortigate Firewall
• Filtering the list of open ports
• Troubleshooting open ports

Step 1: Connect to the Fortigate Firewall CLI

The first step is to connect to the Fortigate Firewall CLI. To do this, you can use the following command:

ssh fortigate@

You will be prompted to enter the password for the Fortigate administrator account. Once you have entered the password, you will be logged into the Fortigate Firewall CLI.

Step 2: Listing the open ports on the Fortigate Firewall

To list the open ports on the Fortigate Firewall, you can use the following command:

show firewall status

This command will display a list of all the open ports on the Fortigate Firewall. The output of this command will look similar to the following:

Status: enabled

Interface: eth0

Protocol: tcp

Source address: any

Destination address: any

Source port: 22

Destination port: 22

State: established

This output shows that the port 22 is open on the Fortigate Firewall.

Step 3: Filtering the list of open ports

You can use the following command to filter the list of open ports:

show firewall status | grep

For example, to filter the list of open ports for port 22, you would use the following command:

show firewall status | grep 22

This command will display the following output:

Status: enabled

Interface: eth0

Protocol: tcp

Source address: any

Destination address: any

Source port: 22

Destination port: 22

State: established

Step 4: Troubleshooting open ports

If you are having trouble with a particular port, you can use the following command to troubleshoot the issue:

diag debug flow

For example, to troubleshoot the port 22, you would use the following command:

diag debug flow 22

This command will display a detailed log of all the traffic that is going through the port 22. This log can be used to troubleshoot any issues that you are having with the port.

In this guide, we have shown you how to check open ports in Fortigate Firewall CLI. We have covered the following topics:

• Connecting to the Fortigate Firewall CLI
• Listing the open ports on the Fortigate Firewall
• Filtering the list of open ports
• Troubleshooting open ports

We hope that this guide has been helpful. If you have any questions, please feel free to leave a comment below.

How To Check Open Ports In Fortigate Firewall Cli?

The FortiGate firewall is a powerful tool that can be used to protect your network from a variety of threats. One of the most important things you can do to keep your network secure is to make sure that all of your ports are closed except for those that you need. This will help to prevent attackers from gaining access to your network.

Fortunately, checking the open ports on your FortiGate firewall is a relatively simple process. In this guide, we will show you how to do it using the FortiGate CLI.

1. Prerequisites

Before you can check the open ports on your FortiGate firewall, you will need to have the following:

• A FortiGate firewall
• A FortiGate CLI account
• The FortiGate CLI command line utility

If you do not have a FortiGate firewall or a FortiGate CLI account, you can create one by following the instructions in the FortiGate documentation.

Once you have the required prerequisites, you can proceed to the next step.

2. Log in to the FortiGate Firewall CLI

To log in to the FortiGate firewall CLI, you will need to open a terminal window and connect to the firewall using SSH.

To do this, use the following command:

ssh @

where:

• `` is the username for your FortiGate CLI account
• `` is the IP address of your FortiGate firewall

Once you have connected to the firewall, you will be prompted to enter your password. Enter your password and press Enter.

You will now be logged in to the FortiGate firewall CLI.

3. Check the open ports

To check the open ports on your FortiGate firewall, you can use the following command:

diag sys nf status

This command will display a list of all of the ports that are currently open on your firewall.

The output of this command will look similar to the following:

Status: OK

Port Protocol State
80 TCP ALLOW
443 TCP ALLOW
22 TCP ALLOW

In this example, the ports 80, 443, and 22 are all open on the firewall.

You can also use the following command to get more detailed information about a specific port:

diag sys nf status

For example, to get more information about port 80, you would use the following command:

diag sys nf status 80

The output of this command will look similar to the following:

Status: OK

Port Protocol State
80 TCP ALLOW

Source IP Address: Any
Source Port: Any
Destination IP Address: Any
Destination Port: 80

Policy: ALLOW
Application: HTTP

This output provides more detailed information about the port 80, including the source and destination IP addresses, the source and destination ports, and the policy that is applied to the port.

Checking the open ports on your FortiGate firewall is a simple process that can help you to keep your network secure. By following the steps in this guide, you can quickly and easily identify any open ports that you may not need.

Here are some additional tips for keeping your FortiGate firewall secure:

• Use strong passwords for your FortiGate CLI account and your firewall’s administrative account.
• Enable two-factor authentication for your FortiGate CLI account.
• Keep your FortiGate firewall up to date with the latest security patches.
• Use a firewall policy to block unauthorized access to your network.

By following these tips, you can help to keep your FortiGate firewall secure and protect your network from a variety of threats.

Q: How do I check open ports on a Fortigate firewall using the CLI?

A: To check open ports on a Fortigate firewall using the CLI, follow these steps:

1. Log in to the Fortigate firewall CLI.
2. Type the following command:

diag sys nf status

3. This command will display a list of all the open ports on the Fortigate firewall.

Q: What do the different columns in the output of the `diag sys nf status` command mean?

A: The different columns in the output of the `diag sys nf status` command have the following meanings:

• Protocol: The protocol of the open port.
• Port: The port number of the open port.
• State: The state of the open port.
• Direction: The direction of the open port.
• Source: The source IP address of the open port.
• Destination: The destination IP address of the open port.
• Service: The service associated with the open port.

**Q: How can I close a port on a Fortigate firewall using the CLI?

A: To close a port on a Fortigate firewall using the CLI, follow these steps:

1. Log in to the Fortigate firewall CLI.
2. Type the following command:

config firewall port
edit set status disable
end

3. This command will close the specified port on the Fortigate firewall.

**Q: How can I open a port on a Fortigate firewall using the CLI?

A: To open a port on a Fortigate firewall using the CLI, follow these steps:

1. Log in to the Fortigate firewall CLI.
2. Type the following command:

config firewall port
edit set status enable
end

3. This command will open the specified port on the Fortigate firewall.

**Q: What are the best practices for checking open ports on a Fortigate firewall?

A: The best practices for checking open ports on a Fortigate firewall include:

• Only checking open ports that are necessary for your network.
• Using a secure connection when checking open ports.
• Keeping your Fortigate firewall up to date with the latest security patches.
• Using a firewall rule to block all incoming traffic except for traffic that is explicitly allowed.

By following these best practices, you can help to protect your network from security threats.

In this blog post, we have discussed how to check open ports in Fortigate firewall CLI. We first introduced the concept of a port and explained why it is important to know which ports are open on your firewall. Then, we showed you how to use the CLI to list all open ports, and how to filter the list by protocol and port number. Finally, we provided some tips on how to secure your firewall by closing unused ports.

We hope that this blog post has been helpful. If you have any questions, please feel free to leave a comment below.