[AusNOG] Telstra Mobile NAT64 Gateway dropping UDP?

[Troy]

Apologies for a non answer, but any app (at least with Apple) is required to support IPv6 only networks.

https://developer.apple.com/support/ipv6/

Rather than work on a 6 to 4 fix, why not put some energy into supporting IPv6?



**Regards, Troy**

Brevity is the elixir of life.


Father Hector McGrath, Pixie 2020






\-------- Original Message --------
On 4 Jan 2022, 9:03 pm, Matthew H < Matthew at marrold.co.uk> wrote:

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> Hi,
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> We are developing a WebRTC mobile app that sets up a media session via Web Socket and then sends the media via RTP over UDP. It's working on most networks but we've had users report issues with the app when their iPhone is connected to the Telstra Mobile network.
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> Unfortunately our network only supports IPv4, and after examining the available logs it appears their iPhone only gets an IPv6 address. The Web Socket communication is able to reach us so I assume a NAT64 gateway is in use, but we don't see any RTP / UDP arrive at our network edge.
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> We found a couple of posts that suggest users have had similar issues with UDP being dropped:
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> https://crowdsupport.telstra.com.au/t5/network-roaming/unable-to-stream-video-over-udp-on-ipv6-only-connection/td-p/933472
> https://crowdsupport.telstra.com.au/t5/network-roaming/ios-and-ipv6/td-p/931449
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> https://crowdsupport.telstra.com.au/t5/apple-ios/nordvpn-won-t-connect-on-4g-ios/td-p/932511
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> Is anyone aware of Telstra's NAT64 gateway dropping UDP?
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> Thanks
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> Matthew
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