Security guides

A firewall plays a vital role in network security and needs to be properly configured to keep organizations protected from data leakage and cyberattacks. It is mandatory to configure a firewall on your computer equipment if you are going to use the I2SysBio’s network. Follow the guides below in order to configure and enable the firewall of your personal computer. In the case that you have to apply a more complex configuration and you do not know how to do it, contact with i2sysbiohpc@uv.es

The following guidelines will completely block the incoming connections to your computer. You will be able to continue accessing the rest of the remote computers but the access to your computer will not be allowed. This means that services like remote desktop (RDP,VNC), ftp, etc will be blocked. If you need to continue using these services contact with i2sysbiohpc@uv.es

Select a guide depending on the operating system you have installed:

Mac OS firewall

  1. On your Mac, choose Apple menu > System Preferences

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  1. Click on Security & Privacity

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  1. Select the tab firewall and click on the lock icon.

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  1. If you have an account with administrator permissions enter your credentials then click on: unlock

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  1. Click on Turn on firewall

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  1. Click on Firewall options

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  1. Enable the checkbox: Block all incoming connections . Click on: OK . Now the firewall is active and all the external connections to your computer will be blocked.

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Windows firewall

  1. On your Windows, type “firewall” in the searching bar. Then choose Windows Defender Firewall

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  1. Click on Turn Windows Defender Firewall on or off

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  1. Enable Turn on Windows Defender Firewall on for Private network settings and Public network settings. Then click on Block all incoming connections including those in the list of allowed apps . Finally click on OK.

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  1. Now the firewall is active and all the external connections to your computer will be blocked.

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Ubuntu firewall

  1. On your desktop, click on the dashboard button, then type “terminal” in the searching box. Click on the terminal icon.

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  1. Enable the ufw firewall

systemctl enable ufw
ufw enable

  1. Allow only connections by SSH

ufw allow 22/tcp

  1. Show all rules

ufw status

More complete firewall

  1. On your desktop, click on the dashboard button, then type “terminal” in the searching box. Click on the terminal icon.

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  1. To install the firewalld package you should have administrator permissions:

sudo apt -y install firewalld
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  1. Enable the firewall:

sudo systemctl enable firewalld
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  1. Start the firewall:

sudo systemctl start firewalld
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  1. Remove the ssh service from the firewall configuration:

sudo firewall-cmd --zone public --remove-service=ssh --permanent
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  1. Finally reload the firewall rules:

sudo firewall-cmd --reload
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