Overview

While accessing online streaming, voice/video calls resources, online games, messengers through Kerio Control firewall, the users are getting frequent timeout errors every 2-3 minutes. The connection drops for 1 second or so, but that interrupts the services completely.

This article provides details on how to allow traffic for Viber, Facebook messenger, PUBG, Call of Duty, and Steam applications.

Solution

All the mentioned above apps require different ports for stable communication between the end-users (PCs, mobile phones, tablets, etc) and the Application servers. You can specify all the relevant service ports for each application and then create a Traffic Rule for allowing the traffic to pass.

1. In Kerio Control Webadmin navigate to Services and click Add.
2. Specify the necessary parameters for each messenger and game:
   1. Viber
      Protocol: TCP/UDP
      Source Port: Any
      Destination Port (List): 5242,4244,5243,7985,80,443
      
   2. Facebook messenger
      Protocol: TCP/UDP
      Source Port: Any
      Destination Port (List): 3478,40002,443
      
   3. PUBG
      Protocol: TCP/UDP
      Source Port: Any
      Destination Port (Equal to): 4380
      
   4. Call of Duty
      Protocol: TCP/UDP
      Source Port: Any
      Destination Port (List): 53,80,88,3074,500,3074,3075,3544,4500,1935,3478,3479,3480,4379,4380
      
   5. Steam
      Protocol: TCP/UDP
      Source Port: Any
      Destination Port (In Range): From 27000 to 27050
      
3. Click Apply to save the changes.
4. Navigate to Traffic Rules and create a new rule with the following values:
   Name: Allow Games/Messengers
   Source: Any
   Destination: Firewall
   Service: Viber, FB messenger, PUBG, Call of Duty, Steam
   IP version: Any
   Action: Allow
   

Testing

Access any of the mentioned applications or games, the traffic should pass smoothly, without frequently dropped connections.