Why not just block client to client communications on the AP? On the UBNT AP go to advanced tab and check box "Enable Client Isolation".
No more abuse of your AP unless they can manage to hook up one device to one AP and one device to another. There is no simple way to block local traffic since it's not going through the router so if they cast from a tablet to a chromcast device this traffic never hit your router, the above will block that traffic if they both are on the same AP. If they are on separate APs you will have to block that traffic on the Switch that the APs are plugged into. / Eje Gustafsson ---------------------------------------- From: "ralph via Mikrotik-users" <[email protected]> Sent: Tuesday, September 27, 2016 3:08 PM To: "Mikrotik Users" <[email protected]> Subject: [Mikrotik Users] A new question- blocking Chromecast Lots of people are abusing the fact that I allow peer-to-peer connections on my APs (Ubiquiti). They are tying up bandwidth sending video, and then if they have a poor signal they are complaining to me. I want people to use a local router and set up a LAN on their boat, rather than using my WAN as their own personal LAN. I would like to block Chromecast but not restrict peer-to-peer. According to some information I found, the Chromecast protocol uses a UDP transmission to 239.255.255.250 on port 1900 for its discovery. How would I block that on the Mikrotik Hotspot? I know I should be more up on firewall rules but I never can find the time to get deep enough into it. The info I found (and it was all I could find) was on a Cisco site. http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/7-6/chrom ecastDG76/ChromecastDG76.html Thanks
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