Keeping safe on the internet Enable or block firewall access — You can control which programs can access the network. This helps to keep your computer secure. Commonly-used network ports — You need to specify the right network port to enable/disable network access for a program with your firewall. Do I need anti-virus software? — There are few Linux viruses, so you probably don’t need anti-virus software. Do I need to scan my emails for viruses? — Viruses are unlikely to infect your computer, but could infect the computers of people you email. More Information Networking, web & email — Connect to wireless and wired networks. Stay safe with a VPN. Create a wireless hotspot.