Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

how to force ipv6 external ip? Make websites see only your ipv6

  • 2 replies
  • 2 have this problem
  • 28 views
  • Last reply by guigs

more options

my computer has both ipv4 and ipv6 addresses.

When I go to any website, the website will log my ipv4 address.

assuming the website is ipv6 ready, Is there a way to make firefox use ipv6 on that website so that the ipv6 address is logged instead of my ipv4?

Is there a proxy config or something?

my computer has both ipv4 and ipv6 addresses. When I go to any website, the website will log my ipv4 address. assuming the website is ipv6 ready, Is there a way to make firefox use ipv6 on that website so that the ipv6 address is logged instead of my ipv4? Is there a proxy config or something?

All Replies (2)

more options

By default network.dns.disable.IPv6 is not disabled.

I think that the ipv6 address needs to be specified on the site itself. In Firefox there is an about:config that is called network.http.fast-fallback-to-IPv4 that is set to true by default. You can try to change that to false, but I could not tell you the likelyhood of that where its not an option. I am pretty sure its a standard. I am pretty sure it it: https://tools.ietf.org/html/rfc4291

more options

I just confirmed. I will try ipv6 first. However if it is falling back it might suggest that the AAAA DNS record is not ipv6.