Hulu / ESPN: Commercial IP Address

Colin Johnston colinj at
Mon Oct 15 08:18:59 UTC 2018

nhs public wifi seems weird for hulu and wifi calling,  uses sophos i see so wondered if right rules enabled...


Sent from my iPod

> On 15 Oct 2018, at 09:10, Christian de Larrinaga <cdel at> wrote:
> Brandon, That is odd. Might this be an artefact of cellular carriers being fixated on revenue protection of their inter carrier rates. Are they (wrongly) assuming a public IP might be a grey market termination risk onto their networks?
> best 
> Christian
> Brandon Butterworth wrote:
>>> On Sat Oct 13, 2018 at 02:39:37PM -0400, Daniel Corbe wrote:
>>> I had a customer with a similar issue.   I statically assigned them a  
>>> different IP and it didn???t resolve it.   The problem turned out to be 
>>> tied  to their Hulu account.
>> I had a similar issue with wifi calling on O2 in the UK. it
>> worked on some wifi but not others. After pressing O2 support
>> for quite some time they admitted "you're on commercial IP space
>> which we don't support" but would say no more.
>> After a little puzzling I realised the working wifis were
>> NATed to 1918 so I added NAT to one that wasn't working and the
>> phone registered OK for wifi calling. The address it was NATed
>> to was the same range so it appears their test is for 1918 space
>> on the client.
>> I'm not saying HULU is the same, I've never has access to it,
>> but companies cook up some wierd ideas of what is accepable for
>> client access. I've still got no idea why having a public IP makes
>> it unnaceptable to make phone calls where their coverage is poor.
>> brandon
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