Canon Oce PlotWave 300 Administration Manual page 240

Applications, protocols and ports used in the Océ ColorWave 600 (Poster Printer) / Océ ColorWave 650 (Poster Printer) / Océ
ColorWave 550 systems
Notes:
(1)
TCP/IP port 443 must be opened and must allow response back on the IT infrastructure firewall.
240 Chapter 5 - Security on Océ ColorWave 550/600/650 (and Poster Printer)