On Friday 26 Dec 2014 02:49:37 Bill Kenworthy wrote: > On 26/12/14 01:42, Joseph wrote: > > On 12/25/14 16:43, Bill Kenworthy wrote: > >> On 25/12/14 15:43, Joseph wrote: > >>> I've installed "zoiper" (this is an softphone app to connect to my > >>> Asterisk server) on my old phone and it works on my private network > >>> over wifi. > >>> I'm using standard IAX port 4569 to register, so this port is open on > >>> my firewall. > >>> > >>> But when I catch an open public wifi network in a Mall or a Tim Horton > >>> "zoiper" failed to register. > >>> > >>> Do they block outgoing ports of public WiFi networks? What are my > >>> alternatives? > >>> > >>> I can open any port on my DD-Wrt and redirect it to my Asterisk server. > >> > >> Quite often happens in this part of the world. I run an openvpn ssl vpn > >> on port 443 with an ssl multiplexor on the server end - route all the > >> voip traffic through the vpn. Doesnt work well if bandwidth is really > >> constrained but its the difference between having at least something or > >> nothing at all. > >> > >> BillK > > > > I do run VoIP over vpn but that is between two points on cable > > connection and it works very well. But running vpn over wifi plus VoIP > > will not work very well if at all. Voice will be very choppy. > > Not necessarily - it depends on bandwidth at both ends (my server is on > adsl.) The important point is port 443 and ssl for the VPN which gets > past all blocking I have encountered so far though I have not noticed > deep packet inspection using MITM yet. I am using self signed certs so > it should show up if its attempted. > > What I have encountered is excessive latency on some open WIFI networks > that makes voice conversation unpleasant.
Do you use QoS at both ends? It could make a difference with ADSL. -- Regards, Mick
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