"High ports" are the local ports usually ranging 32768-61000 on most Linux systems.Īllow both TCP ports 80 outbound to the Chromecast device. To cut to the chase, here's what you need:Īllow high UDP ports both incoming and outgoing. ![]() While it was quite useful, it was a lot of bla bla and also about wireless network tweaking which I wasn't really interested in. With the help of some extra googling I stumbled upon a document from Cisco: Chromecast Deployment Guide, Release 7.6. Finding the right firewall exemptionsĪt the point I noticed I couldn't access my Chromecast with this firewall policy, I found out using tcpdump and Wireshark that it was quite complicated, using mDNS, some other multicast UDP, random high UDP ports, TCP ports 80, etc. ![]() ![]() Then I'll be making the regular exemptions in my firewall for whatever doesn't work anymore.įor example, I'll see my DHCP is blocked, then my DNS requests, then HTTP, etc., and at some point I came to using the Chromecast from Chrome. Iptables -P INPUT DROP iptables -P OUTPUT DROP iptables -P FORWARD DROP
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