Help & troubleshooting for network issues, including connecting your device to your home Wi-Fi network, connecting to public networks, troubleshooting wireless issues & ethernet connections, and optimizing streaming performance.
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Re: On which internet ports does the Roku Express communicate?
Most firewalls are only configured to block outside communications, and permit almost any outgoing port. When the response returns from the public side, the firewall allows the return because it matches the outbound query.
If you have a firewall configured that blocks all internal ports other than 80 and 443, you most likely have sufficient knowledge to run a network packet sniffer and determine what port is being attempted. I wouldn't be surprised to find that the outbound port is randomized in some way, but my networking knowledge is woefully lacking in that specific area.
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