Hi Madhan!We have come across this issue in the past and based on some tests we have the following information to share with you -The WhatsApp application sends non-SSL data over SSL port 443. Hi Madhan!We have come across this issue in the past and based on some tests we have the following information to share with you -The WhatsApp application sends non-SSL data over SSL port 443.
This is not working through the IronPort. So, we configured destination port based NAT for the port 5222 in the firewall to allow lan subnets destined to this port where whatsapp is required. So initial connection is made on 5222 without going through proxy and rest of the traffic goes on 443 via transparent proxy.
Hi Mustapha,We are following below workaround temporarily.Whatsapp initial connection is made on port 5222. This is not working through the IronPort. So, we configured destination port based NAT for the port 5222 in the firewall to allow lan subnets destined to this port where whatsapp is required.So initial connection is made on 5222 without going through proxy and rest of the traffic goes on 443 via transparent proxy.
![Whatsapp Whatsapp](http://jafarponnani.com/wp-content/uploads/2017/12/gbwhatsapp.png)
This works and we are able to send texts, images, videos etc.Regards,Madhan kumar G.