Their HTTP request doesn't comply with HTTP standards and fails to pass my firewall's proxy:
Deny [RokuDeviceLANIP] 44.242.159.114 http/tcp 36712 80 Trusted External ProxyDeny: HTTP Invalid Request-Line format (HTTP-proxy-00) proc_id="http-proxy" rc="595" msg_id="1AFF-0005" proxy_act="Default-HTTP-Client" geo_dst="USA" line="{"advertisingid":"e297fd6d-83ba-5eb5-a2ec-cc34fa704256","audioguideenabled":false,"clientscenehash":"","clockformat":"12h","command":"start","connectiontype":"new","downloadcorecomponents":true,"event":"command","expiry":1643081155000,"externalip":"[ExternalWANIP]","firmwareversion":"10.5.0 (4208)","friendlyname":"Hagrid","header":{"client_sha1":"ea2c571f4d","client_version":"6.12.0-hbo.1","client_version_override":""},"hmac":"zOS4IoEsCMdgtNBygHjirItpSjdvM/K7T6A9ONcv6sw=","host":"hbomax-50-60.youidomain2.com","locale":"en_US","manufacturer":"Roku","modelnumber":"4800X","osname":"RokuOS","rokumodel":"Roku Ultra","serialnumber":"b4c21ae6-5710-53e4-ad39-777df0ac1857","timezone":"US/Eastern","uiresolution":{"height":1080,"name":"FHD","width":1920}}\x00{"event":"persistentStore"}\x00{"event":"ready"}\x00{"event":"MarkEvent","timespan":1474,"type":"boot"}\x00{"event":"ping"}\x00{"event":"ping"}\x00"
The IP addresses have been changed to [names of what those IP addresses are] to protect the privacy of... me.