A website or app stopped working after enabling DPF — what should I do?

Deep Packet Filter (DPF) blocks unwanted domains, and occasionally a site or app relies on a domain that gets filtered. Here's how to sort it out.

First, confirm DPF is the cause: temporarily switch the affected device's DNS back to automatic (see our revert guide). If the site or app then works, DPF was blocking something it needs.

The fix — white-listing: rather than turning DPF off, add the required domain to your white-list using the admin tools. White-listed domains are always allowed to resolve, so the site or app works while everything else stays protected. Our guide to managing white-lists, black-lists and user blocking covers how.

Other things to check:

• Make sure you entered your DNS addresses correctly.
• Clear the device's DNS cache by reconnecting to the network or restarting.

Not sure which domain to allow? Our 24/7 UK support team can help identify what a site needs and get it white-listed. Reach us on 0808 304 8316 (free), by ticket, or at support@transcom.net.