IPV6 and IPV4 fallback

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Level 1

9 points

IPV6 and IPV4 fallback

Hello everybody,

I am using a MacBook Pro Retina 15 from 2013. My ISP doesn't provide IPV6 connectivity yet, so I created a IPV6 tunnel using Hurricane Electric's service. I set up a Raspberry Pi to give IPV6 addresses on my subnet and everything works as expected. I have IPV6 connectivity on my MacBook and I can browse IPV6 sites. I did a test on http://ipv6-test.com . The results were positive but it was said that my browser (latest version of Google Chrome, but the problem is on Safari and Firefox too) doesn't have fallback compatibility. If I try the test again on Windows, Android, ecc. the warning message disappears.

The problem is that I can't browse all websites using my MacBook. For example, the Apple website wasn't appearing: I ran wireshark and Chrome was trying to load everything using IPV6, without success. Also trying to access https://eolo.it/ (my ISP website) generates errors: it doesn't always work on my MacBook, whereas opening it on Windows and IPV6 doesn't have any problems at all. I think that my MacBook (or in general OSX El Capitan) isn't able to fallback to iPV4 when the website has a IPV6 but it isn't working. I read about "Happy eyeballs" and I'd like to know how to solve my problem.

I know I could switch IPV6 off, but I'd prefer to have it and at the same I'd like to be able to use iPV6 when my ISP provides me an IPV6 address.

Thanks you in advance.

OS X El Capitan (10.11.5)

Posted on May 25, 2016 12:54 PM

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Answer 1

BDAqua

Level 10

251,201 points

May 25, 2016 1:07 PM in response to SteMax97

I can't remember, in Sys Prefs>Network>Advanced, is there still a way to set IPv6 to Automatic?

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Answer 2

SteMax97 Author

Level 1

9 points

May 25, 2016 1:13 PM in response to BDAqua

Yes.

It is on automatic and I have all the iPV6 address (as also shown by typing ifconfig). Ping6 and traceroute6 work as a charm, the only problem is with some websites (the one I said in the post).

Facebook through iPV6, google drive, ecc no problem at all.

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Answer 3

BDAqua

Level 10

251,201 points

May 30, 2016 12:43 AM in response to SteMax97

Are you using any AV software?

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Answer 4

appreciate

Level 4

1,278 points

May 28, 2016 12:15 PM in response to SteMax97

In the end of your post it is written you would like to use IPV6 when your ISP provides an IPV6 address.

To do the settings please go to air port utility via spotlight > click on base station > edit > internet > internet options

configure IPV6 as automatically , IPV6 as native and check the box enable IPV6 connection sharing .

Click on save and lastly on update .

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Answer 5

SteMax97 Author

Level 1

9 points

May 30, 2016 12:46 AM in response to BDAqua

In fact this is the problem. I have Eset Cybersecurity. Uninstalling it fixed the problem. If you want to have this antivirus, you should change the default ports to something higher you won't use,such as 65335. I know that this change makes internet protection useless, but at the same time doesn't completely disable antivirus functionality.

Thanks!

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