In this article

What we know

In some circumstances the macOS Roaming Client v1.8.6 will not restore the original DNS settings upon uninstall, leaving the DNSFilter IP—127.0.0.1—as the DNS configuration. 

The commonality among reports of this issue is the v1.8.6 agent has previously crashed or been manually stopped, leading to the original DNS setting being lost in the Roaming Client's memory.

When updating the to latest agent version (2.2.0+) if the previous version encountered this error, the device can lose network connectivity until the correct DNS settings are manually restored on the device.

Version 2.2.0+ is now a System Extension, which means it no longer modifies DNS settings on the device.

How to work around the issue

To help our engineers pinpoint the root cause of this issue, collect diagnostic logs from the impacted device and send to our Support team for review before manually restoring the device's original DNS settings to resolve the issue. 

Here are steps using Google's IP as example.

1. From the local device, navigate to System Settings and select Wi-Fi
2. Select Details of the connected Wi-Fi network
   
3. Tab to DNS. The DNSFilter IP 127.0.0.1 should be listed under DNS Servers
4. Highlight the IP (click it) and select the Minus key (➖) to remove the address
   
5. Select the Plus key (➕) and enter Google's IP: 8.8.8.8
6. Select OK to save the settings