Development discussion of WireGuard
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From: Kristof Mattei <kristofmattei@outlook.com>
To: "wireguard@lists.zx2c4.com" <wireguard@lists.zx2c4.com>
Subject: [iOS] IPv4 -> IPv6 transition
Date: Mon, 22 Aug 2022 23:40:28 +0000	[thread overview]
Message-ID: <BY5PR04MB68330EBD7FBB80A11907EDA9A2719@BY5PR04MB6833.namprd04.prod.outlook.com> (raw)
In-Reply-To: <DM6PR04MB6844F2C8516FF0607FF9F783A2719@DM6PR04MB6844.namprd04.prod.outlook.com>


Hi,
 
I’ve had a bug for the longest while when using Wireguard on T-Mobile USA (IPv6 only).
 
I have a VPN server listening to both IPv4 & IPv6. I have a DNS A and AAAA set on the same domain.
 
When making a connection from an IPv4-only WiFi network with Wireguard enabled and then walking away from the Wifi where we transition to a IPv6 network with 464XLAT we have the issue that Wireguard does not select the AAAA on the domain. 
 
It prefers IPv4, as shown here: https://git.zx2c4.com/wireguard-apple/tree/Sources/WireGuardKit/DNSResolver.swift#n46 and here: https://git.zx2c4.com/wireguard-apple/tree/Sources/WireGuardKit/DNSResolver.swift#n73
 
 
Would it be possible to get this change to prefer to use IPv6?
 
 
That said, if Wireguard has iOS development licenses, I’d be happy to submit a patch (my personal license doesn’t allow me to test VPNs…)

KM

           reply	other threads:[~2022-08-22 23:40 UTC|newest]

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