We've added an additional port for customers needing to use DNSFilter in an network where DNS Proxying is occurring.
  • 53 (udp/tcp)
  • 5353 (udp/tcp)
  • 5354 (udp)
    🆕
  • 853 (tcp)(DNS-over-TLS)
For more details, check out our knowledge base articles on Configuring Your Network and Transparent Proxying.