[Adguard for iOS] Full-tunnel mode breaks remote HomeKit Secure Video camera streams via Cellular connections

[agireud]

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AdGuard version

4.5.8

Browser version

N/A

OS version

iOS 18.2.1

Issue Details

Steps to reproduce:

1. Enable DNS protection in Adguard for iOS in Full-tunnel mode.
2. Open Apple Home app.
3. Attempt to view a remote live stream of a HomeKit Secure Video camera via a cellular connection. (i.e. a cellular connection to view a security camera stream in your home network.)

Expected Behavior

Viewing a remote HomeKit Secure Video Live stream should work when utilizing a cellular connection with DNS protection in Adguard for iOS enabled in full-tunnel mode.

DNS protection in Adguard for iOS in Split-tunnel mode works as expected.

Actual Behavior

DNS protection in Adguard for iOS in full-tunnel mode causes remote HomeKit Secure Video Live streams to fail to load. The Home app returns a No Response error with the following text: "This camera is not responding.".

Full-tunnel mode via cellular connection appears to be dropping packets (1,2) with destination UDP Ports 3478-3497 which are listed for nat-stun-port in Apple's documentation. I suspect these ports are used for viewing HKSV cameras remotely as well.

2025/02/03 19:52:06:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:06:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:06:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:06:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:06:818 [8615517(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:06:818 [8615517(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:06:818 [8615517(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:06:818 [8615517(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:07:782 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:07:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:07:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:07:783 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:07:817 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:07:817 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:07:818 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:07:818 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:09:780 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:09:781 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:09:781 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:09:781 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:09:815 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:09:816 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:09:816 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:09:816 [8615514(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:13:776 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:13:777 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:13:777 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16404 -> 17.188.183.14:3495
2025/02/03 19:52:13:777 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:13:811 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:13:812 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:13:812 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:16406 -> 17.188.182.142:3494
2025/02/03 19:52:13:812 [8615519(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: Dropping non-DNS packet
2025/02/03 19:52:15:751 [8615518(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:58913 -> 198.18.0.1:53
2025/02/03 19:52:15:751 [8615518(com.adguard.dnslibs.AGDnsProxy.queue)]  (DnsLibs) - AGDnsProxy handleIPv4Packet: 172.16.209.3:49823 -> 198.18.0.1:53

Additional Information

Related: AdguardTeam/AdguardForiOS#1666