Eddy
9
https://www.avast.com/faq.php?article=AVKB63
Antivirus software protects you from malware, and a firewall blocks unauthorized access to your computer and data stored there, but a Virtual Private Network (VPN) protects data you upload and download from the Internet. Avast SecureLine allows you to connect to the Internet via an encrypted tunnel to protect your online identity, from eavesdropping. Only a VPN provides security for data after it leaves your computer and anonymizes your Internet activity. Avast SecureLine VPN offers many advantages
As I said before, opening/closing ports is done in a firewall.
A vpn doesn't have anything to do with ports used.
Please answer the questions I have asked you.