Use Chromecast with a DD-WRT router
If you have a Chromecast, and router with the DD-WRT firmware, then you can follow this guide to use your Chromecast with the playmoTV gateway.
Step 1: Access the web-based setup page of your router (by visiting http://192.168.1.1 or http://192.168.0.1 in your browser). Default username is admin and the default password is admin.
Step 2: Go to Administration > Commands to add some firewall rules.
Step 3: Enter these rules in the Commands field:
iptables -t nat -A PREROUTING -d 18.104.22.168 -j DNAT --to-destination 22.214.171.124 iptables -t nat -A PREROUTING -d 126.96.36.199 -j DNAT --to-destination 188.8.131.52
Step 4: Once you have added all these rules, click Save Firewall
Step 5: Reboot your router by go to Administration > Management and click Reboot Router.