[AusNOG] Optus Wifi calling assistance

[Alastair Watts]

Hi Alex,

WiFi Calling establishes an IPSec tunnel back to the mobile network, using a destination hostname based on the mobile country code and mobile network code under the 3gppnetwork.org <http://3gppnetwork.org/> domain.

So permitting UDP 500 and 4500, and IP Protocol 50 (if possible) should cover it, in addition to making sure resolution within the above domain is permitted.

Cheers,

Al


On 24 Jul 2022, at 16:49, Chard, Alex <Alex.Chard at origin.com.au> wrote:

Hi Noggers,
I’m looking for a contact at Optus (or not at Optus maybe?) who would be able to advise what we need to permit on our firewalls to get Wifi Calling working on the Optus network.
I have tried the normal customer support channels and they were predictably useless.
 
Thanks,
Alex Chard
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