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.
