'DNS_PROBE_FINISHED_NXDOMAIN' error when browsing to websites
Last Updated February 06, 2019
While browsing the internet, you get an error message but the page will eventually load if you try it several times. This only happens when connected through Unified Agent (UA).
Web Security Service
This site can't be reached
This can be caused by recent versions of Windows preferring IPv6 over IPv4 and if the "Block IPv6 traffic" option is enabled in the Web Security Service (WSS) portal. If the computer prefers IPv6, DNS queries will be first attempted with AAAA DNS requests. If "Block IPv6 traffic" is enabled in the portal, IPv6 DNS queries will be blocked resulting in the error.
There are a few potential solutions to this issue and it may require a combination of these to fully resolve the issue.