On 3/08/19 5:20 PM, Cameron Simpson wrote:
> On 03Aug2019 08:52, DL Neil <PythonList at DancesWithMice.info> wrote:
>> On 3/08/19 8:32 AM, Terry Reedy wrote:
>>> 2. Do two systems connect directly peer-to-peer or through a server?
>> Exclusively the latter (thus far in the investigation).
> If one party is remote and both are behind a NAT (_very_ common in
> Australia, for example) then you always need an external intermediary.
> Even if that intermediary does no more than connect some sockets from
> each end together and blindly pass traffic.
As is the case with many of the A/V comms packages, if the software is,
or appears to be, a web-browser (IP port 80); then there should be no
particular problem with either NAT or firewalls.