Crestron Flex Series - Page 8

4 • Crestron Flex Phones Security Reference Guide — Doc. 9313A
Function Destination Port From (Sender) To (Listener) Notes
HTTPS 443/TCP Device Microsoft
Portal
For Microsoft portal
services only and not
required for device
functionality. HTTPS
services such as routing
lookups and file transfers
may be used.
HTTPS 443/TCP Device Firmware
Server
Firmware upgrade path
HTTPS 443/TCP Device APKServer APKupgrade path
DHCP 67/UDP Device DHCP Server DHCP addressing
DHCP 68/UDP DHCP Server Device DHCP addressing
HTTP 80/TCP End User
Workstation
Device Web configuration
WPAD 80/TCP Device WPADFile
Server
Gets the PACfile from
the server.
Remote Syslog Configurable Device Remote Syslog
Server
Uses TLS
HTTPProxy Configurable Device Proxy Server
HTTPSProxy Configurable Device Proxy Server
Kerberos 88/TCP Device KDC(Key
Distribution
Center)
DNS 3/TCP/UDP Device DNSserver