Siemens Sinumerik 828D Connection Instructions page 7

Company network change:
 Select S7 communication(TCP/102)
 Select VNC access(TCP/5900)
 Select SSH(TCP/22)
 Select TCP/4840 (Additional ports)
If settings are all done, RESTART is necessary to activate the
new settings.
2018/9/17 Version: V1.4 Joseph.Sun