There are big problems with the Dota 2 matchmaking servers in North America because somebody accidentally cut a cable.
CS:GO players will also encounter some matchmaking issues today. However, this time it’s not a DDoS attack but a simple mistake where somebody, somewhere, chopped a cable. This information is also confirmed by Dota’s 2 official Twitter account.
The US East matchmaking server cluster is offline temporarily. There is a cut fiber cable causing a wide area outage in the hosting region. In the meantime we suggest queuing in other servers.
— DOTA 2 (@DOTA2) July 29, 2020
Twitter user wp494nerws (via PCGamesN) said the issue is also impacting Team Fortress 2 and CS:GO, although there’s been no official word of any problems from either of those accounts. Valve made another announcement, asking players to logout on North America servers and queue up on other servers for now. We don’t know yet when the problem will be fixed, but we will update the article as soon as we find more information.