Free ports for WhatsApp with Proxy

Question

Hello, 
 we use a UTM 9 Version 9.506-2 and have to open the Ports for WhatsApp. 
 All tipps in the forum won't work for me. So i hope, that someone can help me. 
 I opened Port 5222, 5223, 5228-30. 
 Excluded the four Regex for Whatsapp... 
 But the communication is very unstable. 
 
 Anyone who has a solution? 
 
 Kind regards 
 Hendrik

Karlos · Answer

Hi Hendrik, 
 Do you have application control enabled? If so, you will need to allow WhatsApp. 
 If it's not enabled, you will need to add WhatsApp through your Transparent Skip List if using Transparent Mode. 
 If none of those methods work, please provide relevant lines from your logs for review. 
 Thanks, Karlos

apijnappels · Answer

While you are now using Cyberoam as a proxy (and not gateway), you should find your answer in your UTM firewall rules (especially since it starts to work when you allow everything). 
 Like BAlfson said above, have a look at your firewall live log and filter the log on the IP of your iPhone while trying to connect to Whatsapp. First disable the allow everything rule. After that you can see the blocked rules in red color very easily. These are most likely also showing which outbound ports you need to open. 
 In my situation I have the following ports open for Whatsapp (at least I have them specifically marked Whatsapp) 
 TCP 5222, TCP 5223, UDP 3478. 
 The UDP port is for calls through WA.