[asterisk-biz] Is ISP Blocking VoIP

[C F]

Speaking of ssh tunneling, current issue of 2600 (www.2600.com) has a
very interesting idea on Tunneling over ICMP. The author of the
article has written a program to do it, mainly for bypassing payment
on wifis that charge, since they usualy leave ICMP alone. Here is a
link:
http://www.cs.uit.no/~daniels/PingTunnel/


On 1/17/06, Bill Michaelson <bill at cosi.com> wrote:
> Try [ssh] tunneling VoIP with one of them, just to see what happens?
>
> J Thomas wrote:
>
> >I provide hosted PBX service to businesses. About a dozen of them. All
> >of them were working great, but this morning suddenly, 3 places have
> >gone dead. None of the phones from those three places would register
> >with my server :-(
> >
> >As the remaining 10 places are working just fine, hence I am reluctant
> >to blame this failure on Asterisk.
> >
> >Changes is firewall setting at customer site could be a cause, but very
> >unlikely that three of them decided to do that at the same time.
> >Moreover, I specifically asked all three of them and none of them have
> >messed up with their routers.
> >
> >Only thing common among them is that they all have business DSL from
> >Verizon. Could it be that, possibly inadvertently, Verizon is doing
> >something that is blocking VoIP? In any case, how to to find out why
> >VoIP is not working?
> >
> >In this case, all the clients have Polycom phones, about 30 among all
> >three.
> >
> >Thanks,
> >-- jt
> >
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