Feature request: `timeout` option for downloading dns lists

[qupig]

What's the feature 🧐

I think sometimes my network isn't fast enough so it keeps timing out when downloading the lists. I checked the wiki and couldn't find the relevant settings. I'm guessing it might be hardcoded or something?

Could you add a DNS option to set this timeout allowing users to set a higher duration based on network conditions?

2026-04-15T09:55:41Z INFO [dns] downloading hostnames and IP block lists
2026-04-15T09:55:56Z WARN [dns] cannot update filter block lists: scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body)
2026-04-15T09:55:56Z INFO [dns] attempting restart in 20s
2026-04-15T09:56:16Z INFO [dns] downloading hostnames and IP block lists
2026-04-15T09:56:31Z WARN [dns] cannot update filter block lists: scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body), scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body)
2026-04-15T09:56:31Z INFO [dns] attempting restart in 40s
2026-04-15T09:57:11Z INFO [dns] downloading hostnames and IP block lists
2026-04-15T09:57:26Z WARN [dns] cannot update filter block lists: scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body)
2026-04-15T09:57:26Z INFO [dns] attempting restart in 1m20s
2026-04-15T09:58:46Z INFO [dns] downloading hostnames and IP block lists
2026-04-15T09:59:01Z WARN [dns] cannot update filter block lists: scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body)
2026-04-15T09:59:01Z INFO [dns] attempting restart in 2m40s
2026-04-15T10:01:41Z INFO [dns] downloading hostnames and IP block lists
2026-04-15T10:01:56Z WARN [dns] cannot update filter block lists: scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body)
2026-04-15T10:01:56Z INFO [dns] attempting restart in 5m20s
2026-04-15T10:07:16Z INFO [dns] downloading hostnames and IP block lists
2026-04-15T10:07:31Z WARN [dns] cannot update filter block lists: scanning: context deadline exceeded (Client.Timeout or context cancellation while reading body)

Extra information and references

No response

[github-actions]

@qdm12 is more or less the only maintainer of this project and works on it in his free time.
Please:

• do not ask for updates, be patient
• 👍 the issue to show your support instead of commenting
  @qdm12 usually checks issues at least once a week, if this is a new urgent bug,
  revert to an older tagged container image

[qdm12]

Which version are you running?

The http client timeout is set to 35s in the latest image

https://github.com/qdm12/gluetun/blob/e1c182763a4d1e54dd8206e664a8425315bebf97/cmd/gluetun/main.go#L274

But yours seem to be only 15s? I think bumping it to 35s should fix it in all network conditions.

[qupig]

Not sure. Has pull the latest again, let's see what will go. Thanks.

[qupig]

@qdm12 It seems the DNS query timeout is still very short? I've seen some logs for both dot and doh:

DEBUG [dns] exchanging over tls connection (2004ms): context deadline exceeded
WARN [dns] exchanging over https connection (2003ms): context deadline exceeded

This ultimately led to the first healthycheck failing, and repeated restarts.