[asterisk-users] Do public wifi block IAX port 4569

[Martin Lima]

> But when I catch open wifi network in a mall or a Tim Horton "zoiper" fail
> to register.
> 
> Do they block IAX port 4569 or IAX protocol?

Sometimes they use a "Captive portal", you have to open a webpage first and 
confirm some agreement. Until you do, all the packets except those being 
redirected to this are dropped.
Sometimes they only allow some ports, eg. 80, 443, or protocols (http...)
Martin