What should I do if DNS/URL Threat filter service is unavailable on H series

Zyxel_Kevin

Symptom:

Sometimes for some reason the Firewall cannot query the type of website. It may cause delays in opening web pages

Solution:

With uOS 1.30, you can enable Category Query Fail-open. It bypass category check for DNS/URL Threat Filter, Content Filter when category service is unreachable.