Polls

Is there an unsecured wireless network near you?
 
Okay, Google: Why does Chromecast clobber Wi-Fi connections?
Monday, 15 January 2018 12:58

Wi-Fi router vendors have started issuing patches to defend their products against Google Chromecast devices.

TP-Link and Linksys were first out of the blocks with firmware fixes, and TP-Link has posted this explanation of the issue.

The bug is not in the routers, but in Google's "Cast" feature, used in Chromecast, Google Home, and other devices. Cast sends multicast DNS (MDNS) packets as a keep-alive for connections to products like Google Home, and it seems someone forgot to configure the feature to go quiet when Chromecast devices are sleeping.

That, at least, is how Vulture South reads the issue that TP-Link's engineer described:

It continues: “The longer your device is in 'sleep', the larger this packet burst will be.”

If left alone long enough, TP-Link warned, the burst will fill up the router's memory and leave a reboot the only option to restore connectivity.

As a poster to this Reddit thread noted, MDNS uses UDP – and UDP doesn't have congestion control.

Linksys posted its firmware update here, while Netgear acknowledged the issue and put up a beta firmware release here.

ASUS users may also be affected.

It should be noted that the router vendors' fixes are mitigations while the world waits for Google to patch Cast. ®

Source: http://bit.ly/2FDSkNP