<map><m x1="63" x2="181" y1="88" y2="126" ss="0" a="0" /><m x1="57" x2="181" y1="158"
y2="195" ss="0" a="0" /><m x1="62" x2="182" y1="228" y2="264" ss="0" a="0" /><m x1="60" x2="183" y1="301" y2="340" ss="0" a="0" /><m x1="62" x2="182" y1="370" y2="407" ss="0" a="0" /><m x1="672" x2="873" y1="170" y2="212" ss="1" a="0" /><m x1="672" x2="875" y1="258" y2="301" ss="1" a="0" /><c start="0" stop="0" /><c start="2" stop="1" /></map>
Explanation:

Transport Control Protocol (TCP), User Datagram Protocol (UDP) ports, and Protocol Numbers are important to TCP/IP networking, intranets, and the Internet. Ports and protocol numbers provide access to a host computer. However, they also create a security hazard by allowing uninvited access. Therefore, knowing which port to allow or disable increases a network's security. If the wrong ports or protocol numbers are disabled on a firewall, router, or proxy server as a security measure, essential services might become unavailable.
Port 443 is used for Audio, video and application sharing sessions as well as data sharing sessions - For HTTPS.
Port 5223 is used for mobile push notifications - Extensible Messaging and Presence Protocol (XMPP) client connection over SSL.