rethink-app
rethink-app copied to clipboard
celzero
Internet blocked when using hotspot of another phone
Using version 053h on android 9. When I connect to the internet through another phone's hotspot, everything gets blocked. The only things I've found to work are to pause or stop the app.
I have experienced this problem when trying to use the hotspot of various phones. I do not have these problems at all when connecting to a normal wifi connection.
Thanks for the bug report. If you're technical enough, you may answer these (if not, feel free to ignore):
-
Does the hotspot expose an ipv6-only gateway?
-
Is there a mismatch in MTUs (maximum transmission unit)? RethinkDNS app presets it to
1500. If the target network has MTU any lower than1500, then I can see why one'd face connectivity issues (though, I'd imagine TCP recovers, but who knows).
Thanks for the bug report. If you're technical enough, you may answer these (if not, feel free to ignore):
- Does the hotspot expose an ipv6-only gateway?
- Is there a mismatch in MTUs (maximum transmission unit)? RethinkDNS app presets it to
1500. If the target network has MTU any lower than1500, then I can see why one'd face connectivity issues (though, I'd imagine TCP recovers, but who knows).
The following was done while I had the app in pause and I was connected to a phone hotspot.
I went to an ipv6 test website and it said the connection I'm using does have IPv6. https://test-ipv6.com/
I also downloaded a terminal emulator and after entering ifconfig, I saw within wlan0 that there is an MTU of 1500.
For some odd reason, I am able to use the hotspot WiFi without having to use pause or stop now.
I see the same MTU value under wlan0, but when I go to the same site to test IPv6, it fails with these results
Test with IPv4 DNS record | | ok (1.417s) using ipv4
-- | -- | --
Test with IPv6 DNS record | | bad (0.019s)
Test with Dual Stack DNS record | | ok (1.555s) using ipv4
Test for Dual Stack DNS and large packet | | ok (1.619s) using ipv4
Test IPv6 large packet | | bad (0.016s)
Test if your ISP's DNS server uses IPv6 | | ok (1.825s) using ipv4
Find IPv4 Service Provider | | ok (1.241s) using ipv4 ASN 21928
Find IPv6 Service Provider | | bad (0.030s)
IPv6 isn't supported in any of the released versions as of today. It is in the upcoming version v053i(due launch anyday now) #380
v053i is a-go (download from the website for now, build/upload requests submitted to F-Droid and Play, should be available in 5 days or so).
Can you check if your hotspot now works (as RDNS supports IPv6 now, unless disabled explicitly).