Adguard Pro 4.5.0 (1002) failed with CoreDNS DNS-over-QUIC

[pengelana]

Prerequisites

Please answer the following questions for yourself before submitting an issue. YOU MAY DELETE THE PREREQUISITES SECTION.

• 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

• AdGuard version:
  • Adguard Pro 4.5.0 (1002)
• Device model and storage size:
  • iPhone 14 Pro
• Operating system and version:
  • iOS 16.6

DNS-over-QUIC supported by CoreDNS since v1.11.0 and working well with Adguard dnsproxy and dnslookup but failed with Adguard Pro.

Error log exported from Adguard Pro:

2023/08/21 12:56:28:064 [1191144(NewDnsServerController.dnsCheckQueue)]  (NetworkUtils) - upstreamIsValid; Error: Error Domain=com.adguard.dnsproxy Code=13 "Error at ag::dns::test_upstream_internal:51: Upstream exchange error: 
Caused by: Error at ag::dns::DoqUpstream::disconnect:1153: Connection error: " UserInfo={NSLocalizedDescription=Error at ag::dns::test_upstream_internal:51: Upstream exchange error: 
Caused by: Error at ag::dns::DoqUpstream::disconnect:1153: Connection error: }

[pengelana]

Hi @ameshkov,

Can you help with this issue?
Thanks

[ameshkov]

Is there any public CoreDNS-based server we can test it with?

[pengelana]

Hi @ameshkov,

Thank you for your reply, you can test with quic://doh.tiar.app at port 784 or port 853.

[ameshkov]

Thank you, we'll see what's wrong here: AdguardTeam/DnsLibs#204