How to configure firewall
From OmemoWiki
1. Go to the Control Panel and open the "Security Center". Click on Windows Firewall. "
2. Click on the tab "Exceptions" and then press the "Add Program". Click on the Browse button and looking Omemo.exe. This usually located in "C: \ Program Files \ Omemo \ Omemo.exe"
3. Agrees to save the changes.

