Pokusaj ovo da uradis:
Windows 7 / Windows 8 / Windows 10
1. Open the Control Panel from the Start menu
2. Type 'firewall' in the search bar
3. Click on Windows Firewall
4. On the left, find and click Advanced Settings (You may be asked for an administrator password. Enter it to move forward)
5. On the left, find and click Inbound Rules
6. On the right, find and click New Rule
7. The New Inbound Rule Wizard will open. Once it has opened, choose Port and click Next
8. Select TCP and in Specific local ports type: 5242, 4244, 5243, 9785, 80, and 443
9. In the next step select Allow the connection, then click Next
10. Keep all the options selected in the Profile page, then click Next
11. Name the rule as "Viber", then click Finish
12. You will see the port as you named it in the Inbound Rules page
Once you have completed this for TCP, also open a new rule for UDP:
1. On the right, find and click New Rule
2. The New Inbound Rule Wizard will open. Once it has opened, choose Port and click Next
3. Select UDP and in Specific local ports type: 5242, 4244, 5243, 9785, 80, and 443
4. Follow the same steps 9-12 above Repeat this process for each new port you would like to open.
edit:
https://support.viber.com/cust...pening-ports-for-viber-desktop
link ka informaciji