Google Chrome has this neat protocol called QUIC (Quick UDP Internet Connections, which is another perfect acronym, right up there with MAD – Mutually Assured Destruction). The downside is that it can be very traffic intensive, especially on a busy network. This leaves you with essentially two options: disable the protocol in Chrome or block the application at your firewall. The second option is simple enough but it can have some unintended consequences. The first being that Google’s websites support this. So if you try to go to google.com, you’ll probably have a bad time. The first option, disabling it, can be a bit tricky as you’d probably have to manually update each computer to not use it. In a large network, this isn’t possible so we have the next best thing: Group Policy Objects.
Google Chrome GPOs
If you’re not using Chrome’s GPOs, you’re missing out on a lot. If you don’t have them, you can get the templates from here. Once you get the template imported, create a new GPO policy. You’ll want to go to User Configuration > Policies > Administrative Templates > Classic Administrative Templates > Google >Google Chrome. From here find the setting “Allows QUIC protocol” and set to Disabled.
After all or the majority of the computers receive the GPO update, you should begin to see QUIC traffic drop and speeds improve.