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IPv6 is off, but AGH continues to listen to the port #2633

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opened 2026-03-04 02:10:00 -05:00 by deekerman · 6 comments

deekerman commented

2026-03-04 02:10:00 -05:00

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Originally created by @ammnt on GitHub (Apr 7, 2021).

Originally assigned to: @ainar-g on GitHub.

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Prerequisites

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I am running the latest version
I checked the documentation and found no answer
I checked to make sure that this issue has not already been filed

Issue Details

Version of AdGuard Home server:
- 0.105.2
How did you install AdGuard Home:
- Github release
How did you setup DNS configuration:
- VPS
Operating system and version:
- Debian 10

Expected Behavior

Actual Behavior

Adapter does not support IPv6. IPv6 is completely off, but AGH continues to listen to the port:

Additional Information

What is it? Some socket? For what? Why?😅

Originally created by @ammnt on GitHub (Apr 7, 2021). Originally assigned to: @ainar-g on GitHub. Have a question or an idea? Please search it [on our forum](https://github.com/AdguardTeam/AdGuardHome/discussions) to make sure it was not yet asked. If you cannot find what you had in mind, please [submit it here](https://github.com/AdguardTeam/AdGuardHome/discussions/new). ### Prerequisites Please answer the following questions for yourself before submitting an issue. **YOU MAY DELETE THE PREREQUISITES SECTION.** - [x] I am running the latest version - [x] I checked the documentation and found no answer - [x] I checked to make sure that this issue has not already been filed ### Issue Details  * **Version of AdGuard Home server:** * 0.105.2 * **How did you install AdGuard Home:** * Github release * **How did you setup DNS configuration:** * VPS * **Operating system and version:** * Debian 10 ### Expected Behavior  ### Actual Behavior Adapter does not support IPv6. IPv6 is completely off, but AGH continues to listen to the port: ![image](https://user-images.githubusercontent.com/45385632/113889443-eae58e00-97cb-11eb-8ac8-b75d479e2807.png) </details> ### Additional Information What is it? Some socket? For what? Why?😅

deekerman added the

enhancement

P4: Low

external libs

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2026-03-04 02:10:00 -05:00

deekerman commented

2026-03-04 02:10:06 -05:00

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@ainar-g commented on GitHub (Apr 7, 2021):

Hi, just to be clear, by “IPv6 is off” do you mean that aaaa_disabled in the configuration file is set to true or just that the hardware or the OS don't support it? Does it interfere with AGH's normal functioning, or is it just undesirable behaviour?

@ainar-g commented on GitHub (Apr 7, 2021): Hi, just to be clear, by “IPv6 is off” do you mean that `aaaa_disabled` in the configuration file is set to `true` or just that the hardware or the OS don't support it? Does it interfere with AGH's normal functioning, or is it just undesirable behaviour?

deekerman commented

2026-03-04 02:10:06 -05:00

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@ammnt commented on GitHub (Apr 7, 2021):

Hi, just to be clear, by “IPv6 is off” do you mean that aaaa_disabled in the configuration file is set to true or just that the hardware or the OS don't support it? Does it interfere with AGH's normal functioning, or is it just undesirable behaviour?

Yes, it's off at AGH through aaaa_disabled + my domain has no AAAA record + IPv6 is disabled via sysctl.conf:

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.eth0.disable_ipv6 = 1
net.ipv4.icmp_echo_ignore_all = 1

@ammnt commented on GitHub (Apr 7, 2021): > Hi, just to be clear, by “IPv6 is off” do you mean that `aaaa_disabled` in the configuration file is set to `true` or just that the hardware or the OS don't support it? Does it interfere with AGH's normal functioning, or is it just undesirable behaviour? Yes, it's off at AGH through `aaaa_disabled` + my domain has no AAAA record + IPv6 is disabled via sysctl.conf: ``` net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 net.ipv6.conf.eth0.disable_ipv6 = 1 net.ipv4.icmp_echo_ignore_all = 1 ```

deekerman commented

2026-03-04 02:10:06 -05:00

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@ammnt commented on GitHub (Apr 7, 2021):

@ainar-g , AGH is functioned normally, but i want to know what is it and i keep to close all unused ports and disable all unused daemons. Thank you.

@ammnt commented on GitHub (Apr 7, 2021): @ainar-g , AGH is functioned normally, but i want to know what is it and i keep to close all unused ports and disable all unused daemons. Thank you.

deekerman commented

2026-03-04 02:10:06 -05:00

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@ainar-g commented on GitHub (Apr 7, 2021):

I see, thanks. aaaa_disabled merely disables responding to AAAA queries, regardless of which protocol they came over. The part that controls which networks we're listening on is in one of our external libraries, so we'll probably won't be able to add this enhancement in this cycle, but we should probably do that some time after that.

@ainar-g commented on GitHub (Apr 7, 2021): I see, thanks. `aaaa_disabled` merely disables responding to `AAAA` queries, regardless of which protocol they came over. The part that controls which networks we're listening on is in one of our external libraries, so we'll probably won't be able to add this enhancement in this cycle, but we should probably do that some time after that.

deekerman commented

2026-03-04 02:10:06 -05:00

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@DandelionSprout commented on GitHub (Apr 10, 2021):

Adding ::/0 to Disallowed clients, should in theory accomplish OP's goal, except that the admin interface would remain available on IPv6.

@DandelionSprout commented on GitHub (Apr 10, 2021): Adding `::/0` to *Disallowed clients*, should in theory accomplish OP's goal, except that the admin interface would remain available on IPv6.

deekerman commented

2026-03-04 02:10:06 -05:00

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@ammnt commented on GitHub (Apr 24, 2021):

@ainar-g, it works really weird:

Now he listens only on the IPv6 protocol. At the same time, the IPv6 is still turned off and all DNS queries are only IPv4. The loopback IPv6 is not existed too...🤔

@ammnt commented on GitHub (Apr 24, 2021): @ainar-g, it works really weird: ![image](https://user-images.githubusercontent.com/45385632/115959136-4c6b6380-a513-11eb-8ea0-c3d85bcf800d.png) Now he listens only on the IPv6 protocol. At the same time, the IPv6 is still turned off and all DNS queries are only IPv4. The loopback IPv6 is not existed too...🤔

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