WhatsApp Firewall Ports Posted by Andrew on December 2, 2016 If you need WhatsApp Voice Calling to work behind a firewall you will need to open the following ports. TCP: 4244,5222,5223,5228,5242 TCP/UDP: 59234, 50318 UDP: 3478,45395 Tweet Tags: Firewall, WhatsApp Posted in: Blog, Technical Leave a Comment (0) ↓