According to our tests, since we also noted these concerns in the editorial staff, the DNS of most of the operators are disturbed – Slack advises to use those of Google temporarily. In October 2021, the corporate instant messaging software Slack claimed that a problem with DNS was affecting its service. Often the report is initiated by multiple users manifested on social networks: in November 2020, a problem with the operator Orange, fixed or 4G, had been reported. Regardless of your operator, sometimes part of the web suddenly becomes inaccessible. Here’s how to change them on macOS, Windows, and Ubuntu. On October 1, 2021, Slack confirmed that there was an issue affecting some DNS around the world. If part of the web is inaccessible to you but you have no problem with your connection, you may have a problem with your operator’s DNS.