No Internet Connection in Iphone and IPad after entering manual dns

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Level 1

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No Internet Connection in Iphone and IPad after entering manual dns

Hi Community, this is my first post/question in the community, I hope I'll get my issue resolved.

I have Adguard installed on a Raspberry Pi and trying to block ads. I replaced my Netgear router's DNS with Adguard address which is an IP such as 192.168.0.21 which is static IP, I also updated ipv6 DNS as well. My windows and Linux computers are working fine, those are using custom DNS 192.168.0.21, however, apple devices (iPhone 11 and Ipad 9th generation) are not blocking ads. When checking Wifi properties I can see both ipv4 and v6 custom DNS as well as the ISP provider's v6 DNS under the configured DNS. By default, it was "Automatic" and the internet was working but it was not blocking the services that it was supposed to do. Then I changed the configuration to manual and deleted ISP's DNS and my internet stopped working. Below the Wifi name, I see a yellow message "No Internet Connection". How can I connect to the internet with a manual DNS? Thank you for your help.

iPad Pro 9.7-inch WiFi

Posted on Feb 5, 2023 6:55 PM

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Answer 1

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Dogcow-Moof

Level 8

36,539 points

Feb 5, 2023 10:38 PM in response to Lib22

The problem is the manual DNS you have entered is not properly resolving names.

The "No Internet Connection" does not really mean that, what it means is your phone tried to connect to an address and failed, in this case because DNS failed.

You may want to check your Adguard log and see which addresses it blocked on behalf of your iPhone; one or more may be needed for proper operation.

For example, if you have "iCloud Private Relay" enabled:

Prepare Your Network or Web Server for iCloud Private Relay - Support - Apple Developer

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Answer 2

Lib22 Author

Level 1

4 points

Feb 6, 2023 7:57 PM in response to Dogcow-Moof

When I changed it to manual DNS and checked adguard's log it was blocking Mozilla, so I unblocked it. However, the internet still won't work when I change the DNS setting to manual.

I think Private Relay work with Icloud+ however I don't have I cloud+ subscription. I still added "mask-h2.icloud.com" and "mask.icloud.com" in the allow dns list. I'm still get No internet connection error whenever I change dns setting from automatic to manual. Looks like it's not accepting my DNS (192.168.0.21)

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Answer 3

Dogcow-Moof

Level 8

36,539 points

Feb 6, 2023 8:08 PM in response to Lib22

Something in adguard is still blocking DNS resolution on the part of your iPhone, whatever it may be.

Out of curiosity, can you leave DNS resolution on the Pi turned on but shut adguard completely off?

That might be worth a shot to see if the issue is adguard or something else the Pi is (not) doing?

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Answer 4

Lib22 Author

Level 1

4 points

Feb 19, 2023 4:03 PM in response to Dogcow-Moof

I found out DNS service was enabled from the Adguard server's firewall. Port 53 was opened but it was TCP, I didn't know I had to open port 53/UDP or DNS service.

Is it possible to disable ipv6 from apple devices? My modem/router doesn't have the option to disable it.

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Answer 5

Dogcow-Moof

Level 8

36,539 points

Feb 19, 2023 6:46 PM in response to Lib22

You can shut off IPv6 on Macs but not on iOS devices.

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No Internet Connection in Iphone and IPad after entering manual dns

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