保持安全的網際網路環境 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. 更多資訊 網路、網頁與電子郵件 — 連接無線與有線網路、透過 VPN 保障安全、建立無線熱點等。