Pondus
7
When quoting you should put your response after the quote tags 
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.
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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