When quoting you should put your response after the quote tags :wink:
Like this

Is your firewall / network profile in Puplic or private mode?
How do I find this out?
Firewall - Network profiles >> https://help.avast.com/en/av_free/12/settings_fw_profiles.html
If I go to Firewall via Settings > Components > Firewall > Customise I only have the following options Default rules, Preferences and Packet Rules.

===========================================================

Does this help? If not, someone that use the firewall need to guide you and find that setting
https://help.avast.com/en/av_free/12/page_fw_settings.html