Unless you're extremely big like Microsoft or whatnot, you don't run servers directly to the Internet. You run through a cloud service that will prevent DDoS, give you security and way other stuff.

Softlayer Technologies is one of the most successful security companies in the world. You should be worried if you see a direct connection to WhatsApp instead since you're gonna be hacked eventually.

WhatsApp Inc. uses Softlayer to protect themselves against DDoS and hacking. It's not something Yappari does; Yappari just connects to c.whatsapp.net like phones with the official WhatsApp client.


EDIT: By the way your post seems pretty offensive since you're insinuating I'm hacking people or acting as a middle man to hack phones. Yappari is 100% OpenSource you can read the code and compile it yourself. So please do me a personal favor and remove Yappari and stop using it.