This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

DOH not working through VPN's

more options

I have found that DOH does not work through VPN like Protonvpn. why should a TLS connection be affected by a VPN?

I have found that DOH does not work through VPN like Protonvpn. why should a TLS connection be affected by a VPN?

All Replies (4)

more options

What is DOH?

more options

Mace2 said

I have found that DOH does not work through VPN like Protonvpn. why should a TLS connection be affected by a VPN?

Do you mean that Firefox doesn't use DoH when you are on your VPN, or that your DNS queries are all failing if DoH is enabled (with the strict setting of network.trr.mode=3, i.e., no fallback)?

more options

Correct. When I use Protonmail VPN DOH does not work when I go to the 1.1.1.1/help site for verification